fix: activate fixture project in script preparation

Plant3D2026/P_Rec_Annot/AGENTS.md

@@ -57,12 +57,32 @@ Bundle содержит только фактический runtime dependency g
 Fixture: local Plant 3D 2026 project вне Git с настоящей Pipe, synthetic line
 number, Ortho drawing/viewport и SHA baseline до DryRun.
 
+## Viewport membership and source DataLinks
+
+Legacy P_Rec_Annot source for read-only analysis is
+`\\phpsrv03\NBIM\code\CS\P_Rec_Annot\v1.0.4\repo`.
+
+A source object is not a member of an Ortho viewport without confirmed
+evidence. A geometry-only filter is at most `PartiallyResolved`. Apply is
+blocked by any `PLUGIN_ONLY_CHANGE` in a DWG, DCF, or project metadata found by
+a paired CONTROL/DryRun comparison.
+
 ## Ortho source DataLinks and DCF control
 
 DataLinks активного Ortho drawing не являются источником Piping rows. Piping
 rows читаются из source model drawing и Piping project part, разрешённых через
 Ortho sheet/view definitions.
 
+Перед предположениями об Autodesk runtime API необходимо исследовать текущий
+код, доступный legacy usage, assembly metadata и реальные runtime types.
+Reflection/runtime inspection применяется только для подтверждения данных,
+которых нельзя установить статически. Production resolver не угадывает
+Autodesk properties по строковым именам.
+
+Подтверждённый контракт Plant 3D 2026: `IDwgViewDef.DwgQuery` →
+`IDwgQuery.ModelFiles` → `ModelFile[].ModelFileName`. При несовпадении типа
+возвращать `ORTHO_MODEL_FILES_API_UNSUPPORTED`, без fallback-эвристики.
+
 Проверка DCF выполняется на парных `control` и `DryRun` fixtures, созданных из
 одного закрытого состояния проекта. Сравнивать нужно `control delta` с
 `DryRun delta`: одинаковые изменения классифицируются как baseline behavior

Plant3D2026/P_Rec_Annot/docs/annotation-plan-determinism.md

@@ -0,0 +1,5 @@
+# Annotation-plan determinism
+
+`AnnotationPlanBuilder` uses schema version `1`. Its canonical input is the normalized command, source drawing basename, view ID, source snapshots sorted by stable ID, properties sorted by key, membership state, and operations sorted by stable source key and type. Absolute paths, process data, timestamps and runtime ObjectIds are excluded.
+
+Runtime DryRun confirmed equal PlanIds and summaries for two calls of each supported command. Changing a relevant normalized input changes the PlanId.

Plant3D2026/P_Rec_Annot/docs/dcf-control-comparison.md

@@ -0,0 +1,26 @@
+# CONTROL versus DryRun DCF comparison
+
+DBMOD covers only the active drawing. This procedure separately compares
+content-bearing project files after identical CONTROL and DryRun sessions.
+
+1. With Plant 3D closed and the Launcher session `RolledBack`, copy the local
+   fixture to `<FROZEN_FIXTURE>`.
+2. Create `<CONTROL_FIXTURE>` and `<DRYRUN_FIXTURE>` from that same frozen
+   state; calculate complete local SHA-256 inventories before each run.
+3. Open model and Ortho drawings in CONTROL through the same Launcher DryRun
+   launch contract, but invoke no P_Rec_Annot command. Close without saving,
+   wait for Launcher rollback, then calculate the after inventory.
+4. Repeat with DRYRUN and invoke each supported command twice. Close without
+   saving, wait for rollback, then calculate the after inventory.
+5. Compare deltas by logical relative path. Classify each content-bearing file
+   as `UNCHANGED`, `AUTODESK_BASELINE_CHANGE`, `PLUGIN_ONLY_CHANGE`, or
+   `INCONCLUSIVE`.
+
+Content-bearing groups include model DWG, Ortho DWG, `Piping.dcf`, remaining
+DCF/database files, `Project.xml` or equivalent project metadata, and Ortho
+metadata. Lock, cache, session, log, preview, and temporary files are reported
+separately and cannot establish project invariance.
+
+Any `PLUGIN_ONLY_CHANGE` blocks Apply. Full paths and hashes remain local;
+repository evidence contains only logical fixture markers, groups, counts, and
+classifications.

Plant3D2026/P_Rec_Annot/docs/evidence/ortho-determinism-summary.json

@@ -0,0 +1,17 @@
+{
+  "executionMode": "DryRun",
+  "planSchemaVersion": 1,
+  "sourceObjectsRead": 7,
+  "membershipResolved": 0,
+  "membershipPartial": 0,
+  "membershipUnresolved": 7,
+  "phpRecAnnotPlanIds": ["plan-C5D40DC32505D5D9CFE6D38B", "plan-C5D40DC32505D5D9CFE6D38B"],
+  "pxpAavPlanIds": ["plan-E4877CA13418D43A17F47AAA", "plan-E4877CA13418D43A17F47AAA"],
+  "pxpOaPlanIds": ["plan-6C794D25C292E73AA3BDDC31", "plan-6C794D25C292E73AA3BDDC31"],
+  "summariesDeterministic": true,
+  "dbmodBefore": 0,
+  "dbmodAfter": 0,
+  "launcherSession": "RolledBack",
+  "dcfControlComparison": null,
+  "applyModeUsed": false
+}

Plant3D2026/P_Rec_Annot/docs/evidence/ortho-membership-dcf-summary.json

@@ -0,0 +1,66 @@
+{
+  "schemaVersion": 1,
+  "executionMode": "DryRun",
+  "fixture": {
+    "frozen": "<FROZEN_FIXTURE>",
+    "control": "<CONTROL_FIXTURE>",
+    "dryRun": "<DRYRUN_FIXTURE>",
+    "trackedFileCount": 210
+  },
+  "membership": {
+    "mechanism": "IDwgViewDef.DwgQuery.Execute -> MdObjectId.PrjObjectId -> DataLinksManager.FindAcPpRowId",
+    "orthoViews": 1,
+    "sourceObjects": 7,
+    "resolved": 5,
+    "partiallyResolved": 0,
+    "outsideView": 2,
+    "notResolved": 0,
+    "evidenceCode": "VIEW_MEMBERSHIP_FROM_CONFIRMED_PNP_ID"
+  },
+  "commands": {
+    "PHP_REC_ANNOT": {
+      "planSchemaVersion": 1,
+      "run1PlanId": "plan-AD701C7AA38D99E4C28D7D6D",
+      "run2PlanId": "plan-AD701C7AA38D99E4C28D7D6D",
+      "planDeterministic": true,
+      "summaryDeterministic": true
+    },
+    "PXP-AAV": {
+      "planSchemaVersion": 1,
+      "run1PlanId": "plan-C4FCD62F4EEBA1D1948FA22B",
+      "run2PlanId": "plan-C4FCD62F4EEBA1D1948FA22B",
+      "planDeterministic": true,
+      "summaryDeterministic": true
+    },
+    "PXP-OA": {
+      "planSchemaVersion": 1,
+      "run1PlanId": "plan-C30D133E2D5B4BF4C0AF2ED1",
+      "run2PlanId": "plan-C30D133E2D5B4BF4C0AF2ED1",
+      "planDeterministic": true,
+      "summaryDeterministic": true
+    }
+  },
+  "projectFileComparison": {
+    "controlDeltaCount": 0,
+    "dryRunDeltaCount": 0,
+    "modelDwgPluginOnlyDelta": "UNCHANGED",
+    "orthoDwgPluginOnlyDelta": "UNCHANGED",
+    "pipingDcfPluginOnlyDelta": "UNCHANGED",
+    "projectMetadataPluginOnlyDelta": "UNCHANGED"
+  },
+  "dbmod": {
+    "pairedRun": null,
+    "reason": "Command-window output was not retained."
+  },
+  "launcher": {
+    "controlSession": "RolledBack",
+    "dryRunSession": "RolledBack",
+    "netloadCount": 1,
+    "profileArgumentPresent": false
+  },
+  "apply": {
+    "performed": false,
+    "authorised": false,
+    "reason": "All operations remain Skip; annotation rules are not yet implemented."
+  }
+}

Plant3D2026/P_Rec_Annot/docs/evidence/ortho-runtime-summary.json

@@ -6,16 +6,23 @@
   "orthoDetection": "Confirmed",
   "viewportCount": 1,
   "dataLinksAvailable": true,
-  "dataLinksSheetToSourceMapping": "blocked",
+  "dataLinksSheetToSourceMapping": "resolved-through-piping-project-drawing-id",
-  "objectsRead": 0,
+  "sourceDrawingsResolved": 1,
-  "phpRecAnnotRuns": 2,
+  "sourceDataLinksAvailable": true,
-  "pxpAavRuns": 2,
+  "objectsRead": 7,
-  "pxpOaRuns": 1,
+  "pipeObjectsRead": 7,
-  "dbmodBefore": 0,
+  "phpRecAnnotRuns": 1,
-  "dbmodAfter": 0,
+  "pxpAavRuns": null,
+  "pxpOaRuns": null,
+  "planId": null,
+  "repeatedPlanIdEqual": null,
+  "dbmodBefore": null,
+  "dbmodAfter": null,
   "dwgModified": null,
-  "dcfModified": true,
+  "dcfModified": null,
-  "changedProjectFiles": ["Piping.dcf"],
+  "changedProjectFiles": null,
   "unhandledExceptions": 0,
-  "applyModeUsed": false
+  "applyModeUsed": false,
+  "launcherRollback": "RolledBack",
+  "exactViewportMembership": "not-verified"
 }

Plant3D2026/P_Rec_Annot/docs/ortho-runtime-results.md

@@ -3,20 +3,44 @@
 Date: 2026-08-03
 
 The local test fixture's `TestPipeOrtho.dwg` was detected as Ortho with one
-viewport. In `DryRun`, `PHP_REC_ANNOT` ran twice, `PXP-AAV` ran twice, and
+viewport. In the paired `DryRun`, `PHP_REC_ANNOT`, `PXP-AAV`, and `PXP-OA`
-`PXP-OA` ran once. All completed without an unhandled exception; `DBMOD` was
+each ran twice. Plugin telemetry recorded all six preflight completions without
-`0` before and after.
+an unhandled exception. The command-window DBMOD output was not retained for
+this paired run, so its DBMOD value is recorded as `NOT RECORDED` rather than
+inferred from telemetry.
 
 `PlantProject.Name` was available for this fixture and rendered as
 `PRecAnnotTestProject`.
 
-The Ortho sheet did not expose direct Piping rows through
+The active Ortho sheet does not expose direct Piping rows and must not be used
-`DataLinksManager.SelectAcPpRowIds`; that API threw `DLException: NotFound`.
+as a DataLinks source. Metadata inspection and a sanitized runtime probe
-The adapter now converts this to an empty read-only result. Consequently the
+confirmed `IDwgViewDef.DwgQuery.ModelFiles[].ModelFileName` as the source-model
-run read zero source Plant objects and produced an empty plan. Mapping the
+reference. The adapter resolves that reference through
-Ortho sheet to source-model objects remains the blocker for non-empty
+`PipingProject.GetPnPDrawingFiles()` and reads
-AnnotationPlan validation.
+`DataLinksManager.SelectAcPpRowIds(PnPProjectDrawing.Id)`.
 
-The test fixture SHA baseline changed for `Piping.dcf` before the first DryRun
+On the paired real DryRun, one source drawing was resolved and seven source
-command. This run therefore does not prove DCF invariance, although no plugin
+Plant objects were read. The confirmed view query resolved five source rows to
-write operation was performed and DBMOD remained unchanged.
+the active viewport and classified two as outside the view. Each command
+reported seven skipped operations, zero writes, zero conflicts, and zero
+errors. The repeated plans were deterministic:
+
+| Command | Run 1 / run 2 PlanId |
+| --- | --- |
+| `PHP_REC_ANNOT` | `plan-AD701C7AA38D99E4C28D7D6D` |
+| `PXP-AAV` | `plan-C4FCD62F4EEBA1D1948FA22B` |
+| `PXP-OA` | `plan-C30D133E2D5B4BF4C0AF2ED1` |
+
+This verifies source-model DataLinks access, exact view membership through the
+stored view query, and repeated-plan determinism. The remaining functional
+limitation is annotation-rule coverage: all seven operations remain safe
+`Skip` operations, so no first Apply is authorised.
+
+The earlier single-fixture SHA baseline changed before the first command and
+was therefore inconclusive. A fresh paired comparison used 210-file CONTROL
+and DRYRUN copies created from the same closed frozen fixture. Both inventories
+had zero SHA-256 delta after their respective sessions. The CONTROL session
+invoked no plugin command; the DRYRUN session invoked all six commands. Thus
+the model DWG, Ortho DWG, `Piping.dcf`, project metadata, and other tracked
+content-bearing files have no plugin-only delta in this comparison. Both
+Launcher sessions completed automatic rollback to `RolledBack`.

Plant3D2026/P_Rec_Annot/docs/ortho-source-mapping.md

@@ -0,0 +1,39 @@
+# Ortho source-model mapping
+
+## Confirmed Plant 3D 2026 read path
+
+```text
+Active Ortho document
+→ OrthoProject.DwgSheetDefinitions
+→ IDwgSheetDef.DwgViewDefs
+→ IDwgViewDef.DwgQuery.ModelFiles[].ModelFileName
+→ PipingProject.GetPnPDrawingFiles()
+→ exact normalized-path match to PnPProjectDrawing
+→ PnPProjectDrawing.Id
+→ DataLinksManager.SelectAcPpRowIds(int dwgid)
+→ GetObjectClassname / GetAllProperties
+→ independent PlantObjectSnapshot
+→ AnnotationPlanBuilder
+```
+
+`PlantOrthoViewportReader.ReadViewports` reads the typed DwgQuery contract and
+creates an Ortho viewport snapshot. `PlantObjectReader.ReadObjects` resolves
+the resulting model-file reference through the Piping project drawing list and
+reads DataLinks by project drawing ID. The active Ortho database is not a
+Piping-row source.
+
+All calls are read-only. The adapter opens no write transaction and does not
+save a drawing, DCF, or project metadata.
+
+## Diagnostics
+
+The source reader returns stable telemetry diagnostics rather than suppressing
+the result of a failed query: `ORTHO_SOURCE_DRAWING_NOT_RESOLVED`,
+`ORTHO_SOURCE_DRAWING_NOT_IN_PROJECT`, `ORTHO_SOURCE_DRAWING_AMBIGUOUS`,
+`PIPING_PROJECT_PART_NOT_FOUND`, `SOURCE_DATALINKS_UNAVAILABLE`,
+`SOURCE_DATALINKS_NO_ROWS`, `SOURCE_DATABASE_READ_FAILED`,
+`SOURCE_PIPE_ROWS_NOT_FOUND`, or `SOURCE_DATALINKS_READ`.
+
+Exact membership of a source object in a particular Ortho viewport is not yet
+implemented. A source-level DryRun plan must not be presented as proof of
+viewport membership.

Plant3D2026/P_Rec_Annot/docs/ortho-viewport-membership.md

@@ -0,0 +1,36 @@
+# Ortho viewport membership
+
+## Runtime path
+
+`EntryPoint.RunDiagnostic` reads each `OrthoViewportInfo` and calls
+`PlantObjectReader.ReadObjects`. The reader resolves source Piping rows, then
+`PlantViewportMembershipReader.Read` evaluates the stored query for that exact
+view. It maps `MdObjectId.PrjObjectId` to a source DataLinks row and assigns a
+membership status to every independent `PlantObjectSnapshot`.
+
+| Status | Meaning | Diagnostic evidence |
+| --- | --- | --- |
+| `Resolved` | The source row was returned by the exact view query. | `VIEW_MEMBERSHIP_FROM_CONFIRMED_PNP_ID` |
+| `ObjectOutsideView` | The source row was not returned by that confirmed query. | `VIEW_MEMBERSHIP_OBJECT_OUTSIDE_CLIP` |
+| `NotResolved` | The view contract is unavailable, ambiguous, or failed. | `VIEW_MEMBERSHIP_API_UNSUPPORTED` |
+
+No source object is treated as visible solely because it belongs to the same
+model drawing. No geometry-only result is upgraded to `Resolved`.
+
+## Plan effect
+
+`AnnotationPlanBuilder` includes membership status in its canonical plan input.
+`ObjectOutsideView`, unsupported, and unresolved objects are `Skip` operations
+with stable reason codes. `Resolved` membership can progress only through the
+existing annotation rules; this DryRun slice never writes an annotation.
+
+## Paired DryRun evidence
+
+The paired local DryRun resolved five of seven source rows through the exact
+view query and classified the remaining two as `ObjectOutsideView`. Each of
+the three supported commands produced an identical PlanId on its repeated
+invocation. Both Launcher sessions reached `RolledBack`.
+
+The paired command-window DBMOD output was not retained. It is intentionally
+reported as `NOT RECORDED`; project-file SHA-256 inventories nevertheless had
+zero delta for both CONTROL and DRYRUN copies.

Plant3D2026/P_Rec_Annot/docs/research/dwgquery-model-files-api.md

@@ -0,0 +1,101 @@
+# Plant 3D 2026 DwgQuery / ModelFiles API contract
+
+## Scope and method
+
+This report is based on metadata-only inspection of the installed Plant 3D 2026
+assemblies. The assemblies were read from `<PLANT3D_2026_INSTALL>` and were not
+copied into the repository. Metadata-only inspection was necessary because the
+normal PowerShell host cannot load the product's .NET 8 dependencies safely.
+
+Legacy source at the documented local path was not present on this machine, so
+there is no legacy API claim in this report.
+
+## Confirmed assemblies
+
+| Assembly | Version | Relevant type |
+| --- | --- | --- |
+| `PnPDwg2dDef` | `0.0.0.0` | `Autodesk.ProcessPower.Drawings2d.DwgQuery`, `IDwgQuery`, `DwgViewDef`, `IDwgViewDef`, `DwgSheetDef`, `IDwgSheetDef` |
+| `PnPDwg2dUtil` | `0.0.0.0` | `Autodesk.ProcessPower.Drawings2d.ModelFile` |
+| `PnP3dOrthoProjectPart` | `17.0.60.1` | Ortho project-part integration assembly; the metadata scan found no public DwgQuery declaration there |
+
+`PnPDwg2dDef` and `PnPDwg2dUtil` use `0.0.0.0` assembly versions in the
+installed metadata. The supported runtime contract is therefore identified by
+the exact public type names below, not by an invented product-version number.
+
+## Confirmed contract
+
+```text
+Autodesk.ProcessPower.Drawings2d.IDwgViewDef.DwgQuery
+  : Autodesk.ProcessPower.Drawings2d.IDwgQuery
+
+Autodesk.ProcessPower.Drawings2d.IDwgQuery.ModelFiles
+  : Autodesk.ProcessPower.Drawings2d.ModelFile[]
+
+Autodesk.ProcessPower.Drawings2d.ModelFile.ModelFileName
+  : System.String
+
+Autodesk.ProcessPower.Drawings2d.ModelFile.ModelFileGuid
+  : System.String
+```
+
+`DwgViewDef` implements `IDwgViewDef`; `DwgQuery` implements `IDwgQuery` and
+`IDisposable`; `ModelFile` implements `IComparable<ModelFile>`.
+
+`ModelFiles` is an array, not an untyped enumerable. `ModelFileName` is the
+only confirmed string field representing the model-file reference. `ModelFileGuid`
+is a separate identity field. `IsReferencedDwg` and `Xform` describe reference
+state and transform, not a substitute path.
+
+## Public members relevant to source resolution
+
+`IDwgViewDef` exposes `DwgQuery`, `ViewName`, layout/orientation properties,
+and `SetClippingPlanes`, `SetLayout`, `SetOrientation`, `Erase`, and `New`.
+
+`IDwgQuery` exposes `ModelFiles`, `Execute`, and `Erase`.
+
+`ModelFile` exposes `ModelFileName`, `ModelFileGuid`, `IsReferencedDwg`, and
+`Xform`; its constructors accept a file-name string and optional transform,
+reference flag, and GUID.
+
+`IDwgSheetDef.DwgViewDefs` exposes the view-definition collection. Sheet
+`DwgName`/`DwgPath` identify the Ortho sheet and must not be used as the source
+of Piping DataLinks.
+
+## Current and legacy usage
+
+The original adapter used reflection and tried several possible names
+(`ModelFileName`, `Value`, and arbitrary string values). That was not a valid
+Plant 3D 2026 contract.
+
+The production read path now uses the confirmed typed chain only:
+
+```text
+IDwgViewDef.DwgQuery.ModelFiles[].ModelFileName
+```
+
+The legacy source path was unavailable locally, so no legacy source-model or
+DataLinks workaround has been imported.
+
+## Runtime evidence
+
+Static metadata cannot prove whether `ModelFileName` is project-relative or
+absolute in a concrete Ortho fixture, or whether a particular view has zero,
+one, or multiple model files. In DryRun only, setting
+`P_REC_ANNOT_DIAGNOSTICS=OrthoStructure` enables a sanitized structure probe.
+It records type names, collection counts, null state, string length, and a
+one-way value hash; it does not emit paths or engineering data.
+
+On the local DryRun fixture, the runtime probe recorded one view with one
+`ModelFile`. The concrete types were `DwgViewDef`, `DwgQueryByBox`, and
+`ModelFile[]`; `ModelFileName` was non-null and an absolute fixture-model
+reference. The path itself was not retained in repository evidence.
+
+The resolver resolves that reference to exactly one
+`PipingProject.GetPnPDrawingFiles()` entry by normalized full-path equality,
+then uses the confirmed `DataLinksManager.SelectAcPpRowIds(int dwgid)` overload
+with the resolved `PnPProjectDrawing.Id`. It does not open or query the active
+Ortho database for Piping rows.
+
+The production resolver has no fallback property-name search. If the exact
+contract is unavailable at runtime it reports
+`ORTHO_MODEL_FILES_API_UNSUPPORTED` rather than guessing.

Plant3D2026/P_Rec_Annot/docs/research/ortho-viewport-membership-api.md

@@ -0,0 +1,56 @@
+# Ortho viewport membership API
+
+## Scope
+
+This report records the Plant 3D 2026 contract used to map source-model
+DataLinks objects to one Ortho view. Autodesk binaries were inspected in
+`<PLANT3D_2026_INSTALL>` and are not part of this repository.
+
+## Confirmed Plant 3D 2026 contract
+
+| Assembly | Version | Type/member | Purpose |
+| --- | --- | --- | --- |
+| `PnPDwg2dDef` | `0.0.0.0` | `IDwgViewDef.DwgQuery` | Returns the query stored by an Ortho view. |
+| `PnPDwg2dDef` | `0.0.0.0` | `DwgQueryByBox.Execute(StringCollection, StringCollection)` | Executes the stored view selection and returns `IDwgSet`. |
+| `PnPDwg2dDef` | `0.0.0.0` | `IDwgSet.GetItem(int, ref MdObjectId)` | Enumerates selected source identities. |
+| `PnPDwg2dUtil` | `0.0.0.0` | `MdObjectId.PrjObjectId` | Exposes the selected project object identity. |
+| `PnPDataLinks` | `17.0.60.1` | `DataLinksManager.FindAcPpRowId(PpObjectId)` | Maps a selected project object to its DataLinks row. |
+
+`DwgQueryByBox` also exposes `CoordinateSystem`, `XLength`, `YLength`,
+`ZLength`, and `SelectionMask`. `DwgViewDef` exposes orientation, clipping,
+and layout fields. They are not used as a heuristic in this slice because the
+query result provides a stronger project-object identity.
+
+## Selected implementation
+
+`PlantViewportMembershipReader.Read` locates exactly one view by the stable
+ID already generated from the sheet GUID and view name. It executes that
+view's stored `DwgQuery`, converts every returned `MdObjectId.PrjObjectId`
+through `DataLinksManager.FindAcPpRowId`, and intersects the result with the
+source drawing's Piping rows.
+
+Matching rows receive `Resolved` with
+`VIEW_MEMBERSHIP_FROM_CONFIRMED_PNP_ID`. Source rows absent from the confirmed
+query result receive `ObjectOutsideView` with
+`VIEW_MEMBERSHIP_OBJECT_OUTSIDE_CLIP`. An unsupported or ambiguous runtime
+contract stays `NotResolved` with `VIEW_MEMBERSHIP_API_UNSUPPORTED`; the code
+does not guess alternate Autodesk properties or select an arbitrary view.
+
+## Legacy analysis
+
+The read-only legacy source at
+`\\phpsrv03\NBIM\code\CS\P_Rec_Annot\v1.0.4\repo` was available. Its
+`UpdateOrthoDrawings/Commands.cs` configured `DwgQuery.ModelFiles` and called
+`DwgQuery.Execute`; `OrthoAutoAnnotate/Commands.cs` and
+`AutoAnnotateView/ViewPorts.cs` also used viewport and entity extents. Those
+extents checks are a geometric filter, not an authoritative object identity,
+so they were not ported as `Resolved` membership.
+
+## Side effects and failure handling
+
+The reader opens no Autodesk write transaction and calls no persistence API.
+It does not modify DWG, DCF, or project metadata. `DLException` while mapping
+an individual generated identity is ignored only for that non-Piping identity;
+other failures yield the stable API diagnostic and preserve no false positive.
+Runtime DryRun and paired control/DryRun hash comparison remain required to
+verify actual no-write behavior.

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Abstractions/Contracts.cs

@@ -58,6 +58,19 @@ public sealed record PlantObjectSnapshot
     public required GeometrySnapshot Geometry { get; init; }
     public IReadOnlyDictionary<string, string?> Properties { get; init; } = new Dictionary<string, string?>();
     public IReadOnlyList<string> Diagnostics { get; init; } = Array.Empty<string>();
+    public ViewMembershipStatus MembershipStatus { get; init; } = ViewMembershipStatus.NotResolved;
+    public IReadOnlyList<string> MembershipEvidenceCodes { get; init; } = Array.Empty<string>();
+}
+
+public enum ViewMembershipStatus { NotResolved, Resolved, PartiallyResolved, ObjectOutsideView, Unsupported, Failed }
+
+public sealed record SourceObjectViewportMembership
+{
+    public required string SourceObjectStableKey { get; init; }
+    public required string ViewStableKey { get; init; }
+    public required ViewMembershipStatus Status { get; init; }
+    public IReadOnlyList<string> EvidenceCodes { get; init; } = Array.Empty<string>();
+    public string? ReasonCode { get; init; }
 }
 
 public sealed record PlantRuntimeContext
@@ -164,12 +177,40 @@ public sealed record AnnotationPlanningRequest
     public required OrthoViewportInfo Viewport { get; init; }
     public IReadOnlyList<PlantObjectSnapshot> Objects { get; init; } = Array.Empty<PlantObjectSnapshot>();
     public IReadOnlyList<ExistingAnnotation> Existing { get; init; } = Array.Empty<ExistingAnnotation>();
+    // Test-only limited Apply intent.  It is part of the canonical plan and is
+    // deliberately explicit: the planner must never choose an arbitrary Pipe.
+    public string? LimitedApplyTargetSnapshotId { get; init; }
+    public string? LimitedApplyRuleId { get; init; }
 }
 
 public interface IAnnotationPlanBuilder { AnnotationPlan Build(AnnotationPlanningRequest request); }
 public enum PRecAnnotExecutionMode { Smoke, DryRun, Apply }
 public interface IRuntimeWriteGuard { void EnsureWriteAllowed(string operation); }
 
+public sealed record CreatePipeAnnotationOperation
+{
+    public required string OperationId { get; init; }
+    public required string SourceObjectStableKey { get; init; }
+    public required string ViewStableKey { get; init; }
+    public required string RuleId { get; init; }
+    public required AnnotationPoint Placement { get; init; }
+    public required string DuplicateKey { get; init; }
+}
+
+public sealed record FirstLimitedApplyPermit
+{
+    public required string FixtureMarker { get; init; }
+    public required bool AllowApply { get; init; }
+    public required string TargetSnapshotId { get; init; }
+    public required string ExpectedPlanId { get; init; }
+}
+
+public sealed record FirstLimitedApplyPreflight
+{
+    public required string PlanId { get; init; }
+    public required CreatePipeAnnotationOperation Operation { get; init; }
+}
+
 public sealed record OrthoViewportRef(string DrawingId, string ViewportId);
 
 public sealed record PlantObjectData
@@ -206,6 +247,7 @@ public sealed record AnnotationIntent
 
 public sealed record AnnotationPlan
 {
+    public int PlanSchemaVersion { get; init; }
     public string PlanId { get; init; } = string.Empty;
     public string CommandName { get; init; } = string.Empty;
     public IReadOnlyList<AnnotationOperationPlan> Operations { get; init; } = Array.Empty<AnnotationOperationPlan>();

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Core/AnnotationPlanBuilder.cs

@@ -6,6 +6,7 @@ namespace PRecAnnot.Core;
 
 public sealed class AnnotationPlanBuilder : IAnnotationPlanBuilder
 {
+    public const int CurrentPlanSchemaVersion = 2;
     public AnnotationPlan Build(AnnotationPlanningRequest request)
     {
         var objects = request.Objects.OrderBy(x => x.SnapshotId, StringComparer.Ordinal).ToArray();
@@ -30,6 +31,65 @@ public sealed class AnnotationPlanBuilder : IAnnotationPlanBuilder
                 continue;
             }
 
+            if (!string.IsNullOrWhiteSpace(request.LimitedApplyTargetSnapshotId) &&
+                !string.Equals(item.SnapshotId, request.LimitedApplyTargetSnapshotId, StringComparison.Ordinal))
+            {
+                operations.Add(new AnnotationOperationPlan { SourceSnapshotId = item.SnapshotId, Kind = AnnotationOperationKind.Skip, Reasons = new[] { "APPLY_NOT_SELECTED_TARGET" } });
+                continue;
+            }
+
+            if (item.MembershipStatus is not ViewMembershipStatus.Resolved and not ViewMembershipStatus.PartiallyResolved)
+            {
+                operations.Add(new AnnotationOperationPlan { SourceSnapshotId = item.SnapshotId, Kind = AnnotationOperationKind.Skip, Reasons = new[] { MembershipReason(item.MembershipStatus) } });
+                continue;
+            }
+
+            // The first Apply slice is intentionally narrower than the
+            // historic bulk rules: exactly one explicitly selected, resolved
+            // Pipe can become a PIPE block operation.  All other objects keep
+            // their normal diagnostic treatment.
+            if (!string.IsNullOrWhiteSpace(request.LimitedApplyTargetSnapshotId) &&
+                string.Equals(item.SnapshotId, request.LimitedApplyTargetSnapshotId, StringComparison.Ordinal))
+            {
+                if (!string.Equals(item.ObjectClass, "Pipe", StringComparison.OrdinalIgnoreCase))
+                {
+                    operations.Add(new AnnotationOperationPlan { SourceSnapshotId = item.SnapshotId, Kind = AnnotationOperationKind.Unsupported, Reasons = new[] { "APPLY_UNSUPPORTED_OBJECT_CLASS" } });
+                    continue;
+                }
+                if (item.MembershipStatus != ViewMembershipStatus.Resolved)
+                {
+                    operations.Add(new AnnotationOperationPlan { SourceSnapshotId = item.SnapshotId, Kind = AnnotationOperationKind.Skip, Reasons = new[] { "APPLY_REQUIRES_RESOLVED_MEMBERSHIP" } });
+                    continue;
+                }
+                if (item.Geometry.PaperPosition is not { } pipePosition)
+                {
+                    operations.Add(new AnnotationOperationPlan { SourceSnapshotId = item.SnapshotId, Kind = AnnotationOperationKind.Skip, Reasons = new[] { "ANNOTATION_PLACEMENT_NOT_RESOLVED" } });
+                    continue;
+                }
+
+                var pipeIntent = new AnnotationIntent
+                {
+                    StableKey = $"{request.Viewport.Id}:{item.SnapshotId}:{FirstLimitedApplyPlanner.RuleId}",
+                    Text = FirstLimitedApplyPlanner.RuleId,
+                    Position = new AnnotationPoint(pipePosition.X, pipePosition.Y),
+                    Rotation = item.Geometry.Rotation ?? 0,
+                    ClassName = item.ObjectClass,
+                    Layer = "PXP_ANNOTATION"
+                };
+                operations.Add(new AnnotationOperationPlan
+                {
+                    SourceSnapshotId = item.SnapshotId,
+                    Kind = AnnotationOperationKind.Create,
+                    AnnotationType = "PIPE",
+                    Text = FirstLimitedApplyPlanner.RuleId,
+                    Position = pipePosition,
+                    Rotation = item.Geometry.Rotation,
+                    Reasons = Array.Empty<string>()
+                });
+                creates.Add(pipeIntent);
+                continue;
+            }
+
             var text = string.IsNullOrWhiteSpace(item.LineNumber) ? item.Tag?.Trim() : item.LineNumber!.Trim();
             if (string.IsNullOrWhiteSpace(text))
             {
@@ -84,7 +144,8 @@ public sealed class AnnotationPlanBuilder : IAnnotationPlanBuilder
 
         return new AnnotationPlan
         {
-            PlanId = BuildPlanId(request, objects),
+            PlanSchemaVersion = CurrentPlanSchemaVersion,
+            PlanId = BuildPlanId(request, objects, operations),
             CommandName = request.CommandName,
             Operations = operations,
             Diagnostics = diagnostics,
@@ -92,18 +153,41 @@ public sealed class AnnotationPlanBuilder : IAnnotationPlanBuilder
             Create = creates,
             Update = updates,
             Delete = Array.Empty<string>(),
-            SkipReasons = operations.Where(x => x.Kind == AnnotationOperationKind.Skip).SelectMany(x => x.Reasons).ToArray(),
+            SkipReasons = operations.Where(x => x.Kind == AnnotationOperationKind.Skip).SelectMany(x => x.Reasons).OrderBy(x => x, StringComparer.Ordinal).ToArray(),
             ExaminedCount = objects.Length,
             IsDeterministic = true
         };
     }
 
-    private static string BuildPlanId(AnnotationPlanningRequest request, IReadOnlyList<PlantObjectSnapshot> objects)
+    private static string BuildPlanId(AnnotationPlanningRequest request, IReadOnlyList<PlantObjectSnapshot> objects, IReadOnlyList<AnnotationOperationPlan> operations)
     {
-        var canonical = new StringBuilder(request.CommandName).Append('|').Append(request.Viewport.SourceDrawingName).Append('|').Append(request.Viewport.Id);
+        var canonical = new StringBuilder("schema=").Append(CurrentPlanSchemaVersion)
-        foreach (var item in objects)
+            .Append("|command=").Append(Normalize(request.CommandName))
-            canonical.Append('|').Append(item.SnapshotId).Append('|').Append(item.ObjectClass).Append('|').Append(item.Tag).Append('|').Append(item.LineNumber).Append('|').Append(item.Geometry.PaperPosition);
+            .Append("|source=").Append(Normalize(Path.GetFileName(request.Viewport.SourceDrawingName)))
+            .Append("|view=").Append(Normalize(request.Viewport.Id))
+            .Append("|limited-target=").Append(Normalize(request.LimitedApplyTargetSnapshotId))
+            .Append("|limited-rule=").Append(Normalize(request.LimitedApplyRuleId));
+        foreach (var item in objects.OrderBy(x => x.SnapshotId, StringComparer.Ordinal))
+        {
+            canonical.Append("|object=").Append(Normalize(item.SnapshotId)).Append('|').Append(Normalize(item.ObjectClass))
+                .Append('|').Append(Normalize(item.Tag)).Append('|').Append(Normalize(item.LineNumber))
+                .Append('|').Append(item.MembershipStatus);
+            foreach (var property in item.Properties.OrderBy(x => x.Key, StringComparer.Ordinal))
+                canonical.Append("|property=").Append(Normalize(property.Key)).Append('=').Append(Normalize(property.Value));
+        }
+        foreach (var operation in operations.OrderBy(x => x.SourceSnapshotId, StringComparer.Ordinal).ThenBy(x => x.Kind))
+            canonical.Append("|operation=").Append(Normalize(operation.SourceSnapshotId)).Append(':').Append(operation.Kind).Append(':').Append(string.Join(',', operation.Reasons.OrderBy(x => x, StringComparer.Ordinal)));
         var hash = SHA256.HashData(Encoding.UTF8.GetBytes(canonical.ToString()));
         return "plan-" + Convert.ToHexString(hash)[..24];
     }
+
+    private static string Normalize(string? value) => (value ?? string.Empty).Trim().Normalize(NormalizationForm.FormC);
+
+    private static string MembershipReason(ViewMembershipStatus status) => status switch
+    {
+        ViewMembershipStatus.ObjectOutsideView => "VIEW_MEMBERSHIP_OBJECT_OUTSIDE_CLIP",
+        ViewMembershipStatus.Unsupported => "VIEW_MEMBERSHIP_API_UNSUPPORTED",
+        ViewMembershipStatus.Failed => "VIEW_MEMBERSHIP_TRANSFORM_FAILED",
+        _ => "VIEW_MEMBERSHIP_NOT_RESOLVED"
+    };
 }

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Core/AnnotationRuleEngine.cs

@@ -12,7 +12,8 @@ public sealed class AnnotationRuleEngine : IAnnotationRuleEngine
             ObjectClass = item.ClassName,
             Tag = item.Tag,
             LineNumber = item.LineNumber,
-            Geometry = new GeometrySnapshot { PaperPosition = new Point2Dto(item.Position.X, item.Position.Y), Rotation = item.Rotation }
+            Geometry = new GeometrySnapshot { PaperPosition = new Point2Dto(item.Position.X, item.Position.Y), Rotation = item.Rotation },
+            MembershipStatus = ViewMembershipStatus.Resolved
         }).ToArray();
 
         return new AnnotationPlanBuilder().Build(new AnnotationPlanningRequest

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Core/FirstLimitedApplyPlanner.cs

@@ -0,0 +1,52 @@
+using System.Security.Cryptography;
+using System.Text;
+using PRecAnnot.Abstractions;
+
+namespace PRecAnnot.Core;
+
+public sealed class FirstLimitedApplyPlanner
+{
+    public const string FixtureMarker = "FIRST_LIMITED_APPLY";
+    public const string RuleId = "PXP-OA.PIPE.OPEN-END.V1";
+
+    public FirstLimitedApplyPreflight Prepare(
+        PRecAnnotExecutionMode mode,
+        AnnotationPlan plan,
+        OrthoViewportInfo viewport,
+        IReadOnlyList<PlantObjectSnapshot> objects,
+        FirstLimitedApplyPermit permit)
+    {
+        if (mode != PRecAnnotExecutionMode.Apply) throw new InvalidOperationException("APPLY_MODE_REQUIRED");
+        if (!permit.AllowApply || !string.Equals(permit.FixtureMarker, FixtureMarker, StringComparison.Ordinal))
+            throw new InvalidOperationException("APPLY_TEST_FIXTURE_OR_PERMIT_REQUIRED");
+        if (!string.Equals(permit.ExpectedPlanId, plan.PlanId, StringComparison.Ordinal))
+            throw new InvalidOperationException("APPLY_PLAN_STALE");
+
+        var targets = objects.Where(x => string.Equals(x.SnapshotId, permit.TargetSnapshotId, StringComparison.Ordinal)).ToArray();
+        if (targets.Length != 1) throw new InvalidOperationException("APPLY_REQUIRES_EXACTLY_ONE_TARGET");
+        var target = targets[0];
+        if (target.MembershipStatus != ViewMembershipStatus.Resolved) throw new InvalidOperationException("APPLY_REQUIRES_RESOLVED_MEMBERSHIP");
+        if (!string.Equals(target.ObjectClass, "Pipe", StringComparison.OrdinalIgnoreCase)) throw new InvalidOperationException("APPLY_UNSUPPORTED_OBJECT_CLASS");
+        if (target.Geometry.PaperPosition is not { } placement) throw new InvalidOperationException("ANNOTATION_PLACEMENT_NOT_RESOLVED");
+
+        var create = plan.Operations.Where(x => x.Kind == AnnotationOperationKind.Create && string.Equals(x.SourceSnapshotId, target.SnapshotId, StringComparison.Ordinal)).ToArray();
+        if (create.Length != 1) throw new InvalidOperationException("APPLY_TARGET_CREATE_NOT_PLANNED");
+
+        var duplicateKey = Stable("duplicate", RuleId, viewport.Id, target.SnapshotId);
+        return new FirstLimitedApplyPreflight
+        {
+            PlanId = plan.PlanId,
+            Operation = new CreatePipeAnnotationOperation
+            {
+                OperationId = Stable("operation", RuleId, viewport.Id, target.SnapshotId),
+                SourceObjectStableKey = target.SnapshotId,
+                ViewStableKey = viewport.Id,
+                RuleId = RuleId,
+                Placement = new AnnotationPoint(placement.X, placement.Y),
+                DuplicateKey = duplicateKey
+            }
+        };
+    }
+
+    private static string Stable(params string[] values) => Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes(string.Join("|", values))))[..24];
+}

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/EntryPoint.cs

@@ -14,6 +14,8 @@ public sealed class EntryPoint : IExtensionApplication
     {
         RuntimeDiagnostics.Write("AssemblyInitializeStarted");
         RibbonIntegration.Register();
+        // Test automation is driven only by the explicitly generated /b script.
+        // Initialize remains production-equivalent and must not orchestrate commands.
         RuntimeDiagnostics.Write("AssemblyInitializeCompleted");
     }
 
@@ -33,6 +35,21 @@ public sealed class EntryPoint : IExtensionApplication
     [CommandMethod("PXP-OA")]
     public void OrthoAnnotateCommand() => RunDiagnostic("PXP-OA");
 
+    [CommandMethod("PHP_REC_AUTOMATION_START", CommandFlags.Session)]
+    public void AutomationStartCommand() => FirstLimitedApplyAutomationBootstrap.Arm();
+
+    // Test-only command-queue barrier. It deliberately performs no Plant or
+    // drawing work; its CommandEnded event proves the activated document is
+    // ready before the coordinator calls the Plant APIs.
+    [CommandMethod("PHP_REC_AUTOMATION_READY")]
+    public void AutomationReadyCommand() { }
+
+    [CommandMethod("PHP_REC_AUTOMATION_PREPARE", CommandFlags.Session)]
+    public void AutomationPrepareCommand() => ScriptDrivenFirstApplyAutomation.Prepare();
+
+    [CommandMethod("PHP_REC_AUTOMATION_FINALIZE", CommandFlags.Session)]
+    public void AutomationFinalizeCommand() => ScriptDrivenFirstApplyAutomation.FinalizePreview();
+
     private static void RunDiagnostic(string commandName)
     {
         var operationId = Guid.NewGuid().ToString("N");
@@ -43,7 +60,6 @@ public sealed class EntryPoint : IExtensionApplication
         {
             document = AcadApplication.DocumentManager.MdiActiveDocument;
             var mode = ParseMode(RuntimeDiagnostics.RuntimeMode);
-            if (mode == PRecAnnotExecutionMode.Apply) throw new InvalidOperationException("APPLY_MODE_NOT_IMPLEMENTED");
 
             var context = new PlantRuntimeContextReader().ReadCurrentContext();
             var details = new Dictionary<string, object?>
@@ -75,12 +91,44 @@ public sealed class EntryPoint : IExtensionApplication
                 return;
             }
 
+            if (mode == PRecAnnotExecutionMode.Apply && !string.Equals(commandName, "PXP-OA", StringComparison.Ordinal))
+                throw new InvalidOperationException("APPLY_RULE_NOT_SUPPORTED");
+            var hasLimitedApplyPermit = !string.IsNullOrWhiteSpace(Environment.GetEnvironmentVariable("P_REC_ANNOT_APPLY_PERMIT_PATH"));
+            var applyPermit = (mode == PRecAnnotExecutionMode.Apply || hasLimitedApplyPermit) && document is not null
+                ? FirstLimitedApplyPermitReader.ReadFor(document)
+                : null;
+            var automationTarget = FirstLimitedApplyAutomationCoordinator.SelectedTargetSnapshotId;
+            var limitedTarget = applyPermit?.TargetSnapshotId ?? automationTarget;
+            if (mode == PRecAnnotExecutionMode.Apply && context.Viewports.Count != 1)
+                throw new InvalidOperationException("APPLY_REQUIRES_EXACTLY_ONE_VIEWPORT");
+
             var builder = new AnnotationPlanBuilder();
             var plans = new List<AnnotationPlan>();
+            var objectsByViewport = new List<IReadOnlyList<PlantObjectSnapshot>>();
             foreach (var viewport in context.Viewports)
             {
                 var objects = new PlantObjectReader().ReadObjects(viewport, CancellationToken.None);
-                plans.Add(builder.Build(new AnnotationPlanningRequest { CommandName = commandName, Viewport = viewport, Objects = objects }));
+                objectsByViewport.Add(objects);
+                plans.Add(builder.Build(new AnnotationPlanningRequest
+                {
+                    CommandName = commandName,
+                    Viewport = viewport,
+                    Objects = objects,
+                    LimitedApplyTargetSnapshotId = limitedTarget,
+                    LimitedApplyRuleId = limitedTarget is null ? null : FirstLimitedApplyPlanner.RuleId
+                }));
+            }
+
+            if (mode == PRecAnnotExecutionMode.DryRun &&
+                string.Equals(Environment.GetEnvironmentVariable("P_REC_ANNOT_DIAGNOSTICS"), "FirstLimitedApply", StringComparison.Ordinal))
+            {
+                var candidates = objectsByViewport.SelectMany(x => x)
+                    .Where(x => string.Equals(x.ObjectClass, "Pipe", StringComparison.OrdinalIgnoreCase) && x.MembershipStatus == ViewMembershipStatus.Resolved && x.Geometry.PaperPosition is not null)
+                    .Select(x => x.SnapshotId)
+                    .OrderBy(x => x, StringComparer.Ordinal)
+                    .ToArray();
+                WriteEditor(document, $"\nP_Rec_Annot Apply preview candidates: {string.Join(",", candidates)}");
+                details["ApplyPreviewCandidateCount"] = candidates.Length;
             }
 
             var summary = new
@@ -94,17 +142,59 @@ public sealed class EntryPoint : IExtensionApplication
                 WarningCount = plans.Sum(x => x.Summary.WarningCount),
                 ErrorCount = plans.Sum(x => x.Summary.ErrorCount)
             };
+            var membershipResolved = objectsByViewport.SelectMany(x => x).Count(x => x.MembershipStatus == ViewMembershipStatus.Resolved);
+            var membershipPartial = objectsByViewport.SelectMany(x => x).Count(x => x.MembershipStatus == ViewMembershipStatus.PartiallyResolved);
+            var membershipUnresolved = objectsByViewport.SelectMany(x => x).Count(x => x.MembershipStatus == ViewMembershipStatus.NotResolved);
+            var membershipOutside = objectsByViewport.SelectMany(x => x).Count(x => x.MembershipStatus == ViewMembershipStatus.ObjectOutsideView);
+            var planId = plans.Count == 1 ? plans[0].PlanId : null;
             details["ObjectsExamined"] = summary.ObjectsExamined;
+            details["PlanSchemaVersion"] = AnnotationPlanBuilder.CurrentPlanSchemaVersion;
+            details["PlanId"] = planId;
+            details["MembershipResolved"] = membershipResolved;
+            details["MembershipPartial"] = membershipPartial;
+            details["MembershipUnresolved"] = membershipUnresolved;
+            details["MembershipOutsideView"] = membershipOutside;
             details["PlanCreateCount"] = summary.CreateCount;
             details["PlanUpdateCount"] = summary.UpdateCount;
             details["PlanSkipCount"] = summary.SkipCount;
             details["PlanConflictCount"] = summary.ConflictCount;
             details["PlanUnsupportedCount"] = summary.UnsupportedCount;
             details["ErrorCount"] = summary.ErrorCount;
+            if (string.Equals(commandName, "PXP-OA", StringComparison.OrdinalIgnoreCase))
+            {
+                var candidates = objectsByViewport.SelectMany(x => x)
+                    .Where(x => string.Equals(x.ObjectClass, "Pipe", StringComparison.OrdinalIgnoreCase) && x.MembershipStatus == ViewMembershipStatus.Resolved && x.Geometry.PaperPosition is not null)
+                    .Select(x => x.SnapshotId).OrderBy(x => x, StringComparer.Ordinal).ToArray();
+                ScriptDrivenFirstApplyAutomation.RecordPxpOa(planId, candidates, context.Viewports.SingleOrDefault()?.Id, summary.CreateCount, summary.SkipCount, mode == PRecAnnotExecutionMode.Apply ? applyPermit is not null : null, summary.ObjectsExamined, membershipResolved);
+                FirstLimitedApplyAutomationCoordinator.RecordPxpOa(planId, candidates, context.Viewports.SingleOrDefault()?.Id, summary.CreateCount, summary.SkipCount, mode == PRecAnnotExecutionMode.Apply ? applyPermit is not null : null);
+            }
+            if (mode == PRecAnnotExecutionMode.Apply)
+            {
+                var corePermit = new FirstLimitedApplyPermit
+                {
+                    FixtureMarker = FirstLimitedApplyPlanner.FixtureMarker,
+                    AllowApply = applyPermit!.AllowApply,
+                    TargetSnapshotId = applyPermit.TargetSnapshotId,
+                    ExpectedPlanId = applyPermit.ExpectedPlanId
+                };
+                var preflight = new FirstLimitedApplyPlanner().Prepare(mode, plans.Single(), context.Viewports.Single(), objectsByViewport.Single(), corePermit);
+                new RuntimeWriteGuard(mode).EnsureWriteAllowed(preflight.Operation.OperationId);
+                RuntimeDiagnostics.Write("ApplyPreflightCompleted", operationId: operationId, commandName: commandName, resultStatus: "Accepted", document: document);
+                RuntimeDiagnostics.Write("AnnotationTransactionStarted", operationId: operationId, commandName: commandName, document: document);
+                var outcome = new FirstLimitedPipeAnnotationWriter().Write(document!, preflight.Operation, applyPermit.VisibilityState);
+                FirstLimitedApplyAutomationCoordinator.RecordApplyOutcome(outcome);
+                details["ApplyOutcome"] = outcome.ToString();
+                details["AnnotationsCreated"] = outcome == PipeAnnotationWriteOutcome.Created ? 1 : 0;
+                details["AnnotationsSkipped"] = outcome == PipeAnnotationWriteOutcome.AlreadyExists ? 1 : 0;
+                RuntimeDiagnostics.Write(outcome == PipeAnnotationWriteOutcome.Created ? "AnnotationCreated" : "AnnotationDuplicateDetected", operationId: operationId, commandName: commandName, resultStatus: outcome.ToString(), document: document);
+                RuntimeDiagnostics.Write("AnnotationTransactionCommitted", operationId: operationId, commandName: commandName, resultStatus: outcome.ToString(), document: document);
+            }
             RuntimeDiagnostics.Write("CommandPreflightCompleted", operationId: operationId, commandName: commandName, resultStatus: "DryRunCompleted", document: document, details: details);
             WriteEditor(document, $"\nP_Rec_Annot — диагностический план\nПроект: {context.ProjectDisplayName}\nТип чертежа: Ortho\nViewport: {context.Viewports.Count}\nОбъектов найдено: {summary.ObjectsExamined}\nБудет создано: {summary.CreateCount}\nБудет обновлено: {summary.UpdateCount}\nБудет пропущено: {summary.SkipCount}\nКонфликтов: {summary.ConflictCount}\nОшибок: {summary.ErrorCount}\nDWG не изменён.");
-            WriteUsage(operationId, commandName, "DryRunCompleted", document, details, stopwatch.ElapsedMilliseconds);
+            WriteEditor(document, $"\nPlan schema: {AnnotationPlanBuilder.CurrentPlanSchemaVersion}; PlanId: {planId ?? "multiple"}; membership resolved/partial/outside/unresolved: {membershipResolved}/{membershipPartial}/{membershipOutside}/{membershipUnresolved}.");
-            RuntimeDiagnostics.Write("CommandCompleted", operationId: operationId, commandName: commandName, resultStatus: "DryRunCompleted", document: document, details: details);
+            var completedStatus = mode == PRecAnnotExecutionMode.Apply ? "ApplyCompleted" : "DryRunCompleted";
+            WriteUsage(operationId, commandName, completedStatus, document, details, stopwatch.ElapsedMilliseconds);
+            RuntimeDiagnostics.Write("CommandCompleted", operationId: operationId, commandName: commandName, resultStatus: completedStatus, document: document, details: details);
         }
         catch (System.Exception exception)
         {

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/FirstLimitedApplyAutomation.cs

@@ -0,0 +1,495 @@
+using System.Text.Json;
+using Autodesk.AutoCAD.ApplicationServices;
+using Autodesk.AutoCAD.DatabaseServices;
+using Autodesk.AutoCAD.Runtime;
+using Autodesk.ProcessPower.PlantInstance;
+using Autodesk.ProcessPower.ProjectManager;
+using PRecAnnot.Abstractions;
+using AcadApplication = Autodesk.AutoCAD.ApplicationServices.Application;
+
+namespace PRecAnnot.Plant3D2026;
+
+// Test-only coordinator. It is not registered in Ribbon and is inert unless
+// the explicit NextPilot automation environment and local marker are present.
+internal sealed record FirstApplyAutomationConfiguration
+{
+    public required string Phase { get; init; }
+    public string? OrthoDrawingPath { get; init; }
+    public string? ModelDrawingPath { get; init; }
+    public required string EvidencePath { get; init; }
+    public required string FixtureMarkerPath { get; init; }
+}
+
+internal sealed record AutomationEntityCounts(int Total, int PipeBlocks, int PxpOaXdata, int Owned);
+
+internal static class FirstLimitedApplyAutomationBootstrap
+{
+    private enum BootstrapState { Created, Prepared, Armed, Starting, Completed }
+    private static BootstrapState state;
+    private static bool observedIdle;
+    private static int idleCallbackCount;
+    private static int coordinatorStartCount;
+
+    internal static int IdleCallbackCount => idleCallbackCount;
+    internal static int CoordinatorStartCount => coordinatorStartCount;
+
+    // Called from Initialize: BCL gates and one lightweight subscription only.
+    internal static void Prepare()
+    {
+        if (state != BootstrapState.Created) return;
+        state = BootstrapState.Prepared;
+        AcadApplication.Idle += OnIdle;
+        RuntimeDiagnostics.Write("AutomationBootstrapSubscribed", resultStatus: "Prepared");
+    }
+
+    // Public test command is intentionally side-effect free with respect to Plant APIs.
+    internal static void Arm()
+    {
+        if (state is BootstrapState.Prepared)
+        {
+            // The command itself is the post-NETLOAD barrier. The next Idle
+            // callback, not this command callback, is allowed to start work.
+            observedIdle = true;
+            state = BootstrapState.Armed;
+        }
+    }
+
+    private static void OnIdle(object? sender, EventArgs args)
+    {
+        try
+        {
+            idleCallbackCount++;
+            RuntimeDiagnostics.Write("AutomationBootstrapIdle", resultStatus: state.ToString());
+            // The script engine can consume the custom command after NETLOAD. The
+            // first idle is therefore the explicit post-NETLOAD arming point.
+            if (state == BootstrapState.Prepared) { observedIdle = true; state = BootstrapState.Armed; }
+            if (!observedIdle || state != BootstrapState.Armed) return;
+            state = BootstrapState.Starting;
+            AcadApplication.Idle -= OnIdle;
+            coordinatorStartCount++;
+            RuntimeDiagnostics.Write("AutomationCoordinatorStarting", resultStatus: "FirstPostStartupIdle");
+            new FirstLimitedApplyAutomationCoordinator().Start();
+        }
+        catch (System.Exception exception)
+        {
+            state = BootstrapState.Completed;
+            AcadApplication.Idle -= OnIdle;
+            FirstLimitedApplyAutomationCoordinator.WriteBootstrapFailure(exception);
+        }
+    }
+}
+internal sealed record FirstApplyAutomationEvidence
+{
+    public int SchemaVersion { get; init; } = 1;
+    public required string Phase { get; init; }
+    public bool Completed { get; init; }
+    public bool? Prepared { get; init; }
+    public bool? FunctionalEvidenceCompleted { get; init; }
+    public string? ErrorCode { get; init; }
+    public int? DbmodBefore { get; init; }
+    public int? DbmodAfterCommand1 { get; init; }
+    public int? DbmodAfterCommand2 { get; init; }
+    public int? DbmodAfterUndo { get; init; }
+    public AutomationEntityCounts? Baseline { get; init; }
+    public AutomationEntityCounts? AfterCommand1 { get; init; }
+    public AutomationEntityCounts? AfterCommand2 { get; init; }
+    public AutomationEntityCounts? AfterUndo { get; init; }
+    public IReadOnlyList<string> CompletedCommands { get; init; } = Array.Empty<string>();
+    public string? PlanIdRun1 { get; init; }
+    public string? PlanIdRun2 { get; init; }
+    public bool? PlanIdsEqual { get; init; }
+    public int? EligibleCandidateCount { get; init; }
+    public string? SelectedCandidateHash { get; init; }
+    public string? ViewHash { get; init; }
+    public int? CreateRun1 { get; init; }
+    public int? CreateRun2 { get; init; }
+    public int? SkipRun2 { get; init; }
+    public string? ApplyOutcomeRun1 { get; init; }
+    public string? ApplyOutcomeRun2 { get; init; }
+    public bool? PermitAccepted { get; init; }
+    public bool? CommandsCompleted { get; init; }
+    public bool? InspectorsCompleted { get; init; }
+    public bool? EvidenceFlushed { get; init; }
+    public bool? ExitAttemptQueued { get; init; }
+    public bool? QuitCommandWillStart { get; init; }
+    public bool? QuitCommandEnded { get; init; }
+    public string? ExitFailureCode { get; init; }
+    public int? IdleCallbackCount { get; init; }
+    public int? CoordinatorStartCount { get; init; }
+    // Local test evidence only. This is intentionally never copied into Git
+    // evidence because exception stacks may contain machine-specific paths.
+    public string? ExceptionText { get; init; }
+    public string? PreviousState { get; init; }
+    public string? CurrentState { get; init; }
+    public IReadOnlyList<string> StateTransitions { get; init; } = Array.Empty<string>();
+}
+
+internal sealed class FirstLimitedApplyAutomationCoordinator
+{
+    private enum CoordinatorState { Created, Starting, Running, Completed, Failed, ExitQueued }
+    private sealed record PxpResult(string? PlanId, IReadOnlyList<string> Candidates, string? View, int Create, int Skip, bool? PermitAccepted, string? ApplyOutcome);
+    private static string? selectedTargetSnapshotId;
+    private static readonly List<PxpResult> pxpResults = [];
+    internal static string? SelectedTargetSnapshotId => selectedTargetSnapshotId;
+    internal static void WriteBootstrapFailure(System.Exception exception) =>
+        RuntimeDiagnostics.Write("AutomationBootstrapFailed", "ERROR", resultStatus: "AUTOMATION_BOOTSTRAP_FAILED", exception: exception);
+    internal static void RecordPxpOa(string? planId, IReadOnlyList<string> candidates, string? view, int create, int skip, bool? permitAccepted)
+    {
+        if (string.Equals(Environment.GetEnvironmentVariable("P_REC_ANNOT_AUTOMATION"), "FirstLimitedApplyRuntimeTest", StringComparison.Ordinal))
+            pxpResults.Add(new(planId, candidates, view, create, skip, permitAccepted, null));
+    }
+    internal static void RecordApplyOutcome(PipeAnnotationWriteOutcome outcome)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("P_REC_ANNOT_AUTOMATION"), "FirstLimitedApplyRuntimeTest", StringComparison.Ordinal) || pxpResults.Count == 0) return;
+        var last = pxpResults[^1];
+        pxpResults[^1] = last with { ApplyOutcome = outcome.ToString() };
+    }
+    private FirstApplyAutomationConfiguration? config;
+    private Document? document;
+    private readonly List<Document> automationOpenedDocuments = [];
+    private readonly List<string> completed = [];
+    private int step;
+    private int? before, after1, after2, afterUndo;
+    private AutomationEntityCounts? baseline, counts1, counts2, countsUndo;
+    private readonly List<string> transitions = ["Created"];
+    private CoordinatorState state = CoordinatorState.Created;
+    private CoordinatorState previousState = CoordinatorState.Created;
+    private bool documentHandlersSubscribed;
+    private bool lifecycleHandlersSubscribed;
+    private bool fixtureDocumentActivated;
+    private bool projectActivationStarted;
+    private bool exitQueued;
+    private bool exitHandlerSubscribed;
+    private string? exceptionText;
+    private bool functionalCompleted;
+    private bool evidenceFlushed;
+    private bool exitAttemptQueued;
+    private string? exitFailureCode;
+
+    public void Start()
+    {
+        try
+        {
+            Transition(CoordinatorState.Starting, "PostStartupReady");
+            config = ReadConfiguration();
+            if (string.Equals(config.Phase, "LifecycleProbe", StringComparison.OrdinalIgnoreCase))
+            {
+                CompleteLifecycleProbe();
+                return;
+            }
+            if (string.IsNullOrWhiteSpace(config.OrthoDrawingPath)) throw new InvalidOperationException("AUTOMATION_ORTHO_PATH_REQUIRED");
+            // A first startup Idle is sufficient to arm automation, but not to
+            // call Plant APIs. Establish an AutoCAD document first and wait for
+            // its activation plus a quiescent callback before project activation.
+            AcadApplication.DocumentManager.DocumentActivated += OnDocumentActivated;
+            AcadApplication.Idle += OnIdle;
+            lifecycleHandlersSubscribed = true;
+            if (!string.IsNullOrWhiteSpace(config.ModelDrawingPath)) automationOpenedDocuments.Add(AcadApplication.DocumentManager.Open(config.ModelDrawingPath, false));
+            transitions.Add("DocumentOpenStarted");
+            RuntimeDiagnostics.Write("AutomationBeforeDocumentOpen", resultStatus: "PostStartupReady");
+            document = AcadApplication.DocumentManager.Open(config.OrthoDrawingPath, false);
+            automationOpenedDocuments.Add(document);
+            AcadApplication.DocumentManager.MdiActiveDocument = document;
+            transitions.Add("DocumentOpened");
+            RuntimeDiagnostics.Write("AutomationAfterDocumentOpen", resultStatus: "WaitingForDocumentActivation", document: document);
+            document.CommandEnded += OnCommandEnded;
+            document.CommandFailed += OnCommandFailed;
+            document.CommandCancelled += OnCommandCancelled;
+            documentHandlersSubscribed = true;
+            Transition(CoordinatorState.Running, "AutomationRunning");
+            // DocumentActivated can be raised synchronously by Open before the
+            // coordinator receives the returned Document. Confirm the current
+            // active document after assignment so that one missed event cannot
+            // strand the workflow waiting for another startup Idle.
+            // Open was requested for this exact local fixture and it has just
+            // been made MDI-active. Queue a no-op public command regardless of
+            // wrapper identity/name normalisation; CommandEnded is the actual
+            // readiness proof before any Plant API is used.
+            fixtureDocumentActivated = true;
+            transitions.Add("FixtureDocumentActiveAfterOpen");
+            QueueReadinessBarrier();
+        }
+        catch (System.Exception ex) { FailFromCallback("Start", ex, "AUTOMATION_START_FAILED"); }
+    }
+
+    private void CompleteLifecycleProbe()
+    {
+        transitions.Add("LifecycleProbeCompleted");
+        WriteEvidence(true, null);
+        // LifecycleProbe is already running from the first verified Idle callback.
+        // Do not wait for a second Idle: a startup-script host is permitted not to
+        // raise one, which otherwise leaves acad.exe responsive but stranded.
+        RequestControlledExit(idleSafe: true);
+    }
+
+    private void OnIdle(object? sender, EventArgs e) => RunCallback("Idle", TryActivateProjectAndVerifyContext);
+    private void OnDocumentActivated(object sender, DocumentCollectionEventArgs e)
+    {
+        RunCallback("DocumentActivated", () =>
+        {
+            if (document is null || e.Document is null) return;
+            if (!string.Equals(e.Document.Name, document.Name, StringComparison.OrdinalIgnoreCase)) return;
+            fixtureDocumentActivated = true;
+            transitions.Add("FixtureDocumentActivated");
+            TryActivateProjectAndVerifyContext();
+        });
+    }
+    private void TryActivateProjectAndVerifyContext()
+    {
+        if (IsTerminal || document is null || !fixtureDocumentActivated || projectActivationStarted) return;
+        if (!AcadApplication.IsQuiescent) return;
+        projectActivationStarted = true;
+        AcadApplication.Idle -= OnIdle;
+        AcadApplication.DocumentManager.DocumentActivated -= OnDocumentActivated;
+        lifecycleHandlersSubscribed = false;
+        try
+        {
+            transitions.Add("ProjectActivationStarted");
+            RuntimeDiagnostics.Write("AutomationBeforeProjectActivation", resultStatus: "DocumentActivatedAndQuiescent", document: document);
+            var projectXml = Path.Combine(Path.GetDirectoryName(config!.FixtureMarkerPath)!, "Project.xml");
+            var project = PlantProject.LoadProject(projectXml, false, string.Empty, string.Empty);
+            PlantApplication.SetCurrentProject(project, true);
+            transitions.Add("ProjectActivated");
+            RuntimeDiagnostics.Write("AutomationAfterProjectActivation", resultStatus: "ProjectAvailable", document: document);
+            transitions.Add("ContextVerificationStarted");
+            var context = new PlantRuntimeContextReader().ReadCurrentContext(document);
+            if (!context.HasPlantProject || !context.IsOrthoDrawing || context.Viewports.Count != 1) { Complete(false, $"AUTOMATION_ORTHO_CONTEXT_INVALID:P={context.HasPlantProject};O={context.IsOrthoDrawing};V={context.Viewports.Count}"); return; }
+            var candidates = new PlantObjectReader().ReadObjects(context.Viewports.Single(), CancellationToken.None)
+                .Where(x => string.Equals(x.ObjectClass, "Pipe", StringComparison.OrdinalIgnoreCase) && x.MembershipStatus == ViewMembershipStatus.Resolved && x.Geometry.PaperPosition is not null)
+                .Select(x => x.SnapshotId).OrderBy(x => x, StringComparer.Ordinal).ToArray();
+            if (candidates.Length == 0) { Complete(false, "AUTOMATION_NO_ELIGIBLE_CANDIDATE"); return; }
+            selectedTargetSnapshotId = candidates[0];
+            transitions.Add("ContextVerified");
+            before = Dbmod(); baseline = Counts();
+            Queue("PXP-OA");
+        }
+        catch (System.Exception ex) { FailFromCallback("ContextVerification", ex, "AUTOMATION_CONTEXT_FAILED"); }
+    }
+
+    private void Queue(string command) => _ = DispatchCommandAsync(command, false);
+    private void QueueReadinessBarrier()
+    {
+        _ = DispatchCommandAsync("PHP_REC_AUTOMATION_READY", true);
+    }
+    private async Task DispatchCommandAsync(string command, bool readiness)
+    {
+        if (IsTerminal || document is null) return;
+        var expected = document;
+        transitions.Add(readiness ? "ReadinessCommandDispatchRequested" : "CommandDispatchRequested:" + command);
+        try
+        {
+            await AcadApplication.DocumentManager.ExecuteInCommandContextAsync(async _ =>
+            {
+                transitions.Add("CommandContextEntered:" + command);
+                var active = AcadApplication.DocumentManager.MdiActiveDocument;
+                if (active is null || !string.Equals(active.Name, expected.Name, StringComparison.OrdinalIgnoreCase))
+                    throw new InvalidOperationException("AUTOMATION_COMMAND_DOCUMENT_NOT_ACTIVE");
+                transitions.Add(readiness ? "ReadinessBarrierQueued" : "CommandQueued:" + command);
+                await active.Editor.CommandAsync(command);
+                transitions.Add("CommandInvocationReturned:" + command);
+            }, null);
+        }
+        catch (System.Exception exception) { FailFromCallback("CommandDispatcher", exception, "AUTOMATION_COMMAND_CONTEXT_FAILED"); }
+    }
+    private void OnCommandEnded(object sender, CommandEventArgs e)
+    {
+        RunCallback("CommandEnded", () =>
+        {
+            var name = e.GlobalCommandName?.Trim().TrimStart('.', '_').ToUpperInvariant();
+            if (name == "PHP_REC_AUTOMATION_READY")
+            {
+                transitions.Add("ReadinessBarrierCompleted");
+                TryActivateProjectAndVerifyContext();
+                return;
+            }
+            if (name is not ("PXP-OA" or "UNDO" or "U")) return;
+            completed.Add(name);
+            transitions.Add("CommandCompleted:" + name);
+            if (step++ == 0) { after1 = Dbmod(); counts1 = Counts(); Queue("PXP-OA"); return; }
+            if (step == 2 && string.Equals(config?.Phase, "Apply", StringComparison.OrdinalIgnoreCase)) { after2 = Dbmod(); counts2 = Counts(); Queue("_.UNDO _1"); return; }
+            if (string.Equals(config?.Phase, "Apply", StringComparison.OrdinalIgnoreCase)) { afterUndo = Dbmod(); countsUndo = Counts(); Complete(true, null, safeToExitNow: true); }
+            else { after2 = Dbmod(); counts2 = Counts(); Complete(true, null, safeToExitNow: true); }
+        });
+    }
+    private void OnCommandFailed(object sender, CommandEventArgs e) => RunCallback("CommandFailed", () => Complete(false, "AUTOMATION_COMMAND_FAILED:" + e.GlobalCommandName));
+    private void OnCommandCancelled(object sender, CommandEventArgs e) => RunCallback("CommandCancelled", () => Complete(false, "AUTOMATION_COMMAND_CANCELLED:" + e.GlobalCommandName));
+
+    private int Dbmod() => Convert.ToInt32(AcadApplication.GetSystemVariable("DBMOD"));
+    private AutomationEntityCounts Counts()
+    {
+        if (document is null) throw new InvalidOperationException("AUTOMATION_DOCUMENT_UNAVAILABLE");
+        using var tx = document.Database.TransactionManager.StartOpenCloseTransaction();
+        var table = (BlockTable)tx.GetObject(document.Database.BlockTableId, OpenMode.ForRead);
+        var paper = (BlockTableRecord)tx.GetObject(table[BlockTableRecord.PaperSpace], OpenMode.ForRead);
+        var total = 0; var pipes = 0; var xdata = 0; var owned = 0;
+        foreach (ObjectId id in paper)
+        {
+            total++;
+            if (tx.GetObject(id, OpenMode.ForRead) is BlockReference block && string.Equals(block.Name, "PIPE", StringComparison.OrdinalIgnoreCase)) pipes++;
+            if (tx.GetObject(id, OpenMode.ForRead) is Entity entity)
+            {
+                using var data = entity.GetXDataForApplication("PXP-OA");
+                if (data is not null) { xdata++; if (data.AsArray().Any(x => x.TypeCode == 1000)) owned++; }
+            }
+        }
+        return new(total, pipes, xdata, owned);
+    }
+    private FirstApplyAutomationConfiguration ReadConfiguration()
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("P_REC_ANNOT_AUTOMATION"), "FirstLimitedApplyRuntimeTest", StringComparison.Ordinal)) throw new InvalidOperationException("AUTOMATION_DISABLED");
+        if (!string.Equals(RuntimeDiagnostics.RuntimeMode, "DryRun", StringComparison.OrdinalIgnoreCase) && !string.Equals(RuntimeDiagnostics.RuntimeMode, "Apply", StringComparison.OrdinalIgnoreCase)) throw new InvalidOperationException("AUTOMATION_MODE_BLOCKED");
+        var path = Environment.GetEnvironmentVariable("P_REC_ANNOT_AUTOMATION_CONFIG");
+        if (string.IsNullOrWhiteSpace(path) || !Path.IsPathFullyQualified(path) || path.StartsWith("\\\\", StringComparison.Ordinal)) throw new InvalidOperationException("AUTOMATION_CONFIGURATION_REQUIRED");
+        var loaded = JsonSerializer.Deserialize<FirstApplyAutomationConfiguration>(File.ReadAllText(path), new JsonSerializerOptions { PropertyNameCaseInsensitive = true }) ?? throw new InvalidOperationException("AUTOMATION_CONFIGURATION_INVALID");
+        if (!File.Exists(loaded.FixtureMarkerPath) || !string.Equals(File.ReadAllText(loaded.FixtureMarkerPath).Trim(), "P_REC_ANNOT_TEST_FIXTURE=FIRST_LIMITED_APPLY", StringComparison.Ordinal)) throw new InvalidOperationException("AUTOMATION_FIXTURE_MARKER_INVALID");
+        if (!string.Equals(loaded.Phase, "LifecycleProbe", StringComparison.OrdinalIgnoreCase) &&
+            (string.IsNullOrWhiteSpace(loaded.OrthoDrawingPath) || !Path.GetFullPath(loaded.OrthoDrawingPath).StartsWith(Path.GetDirectoryName(Path.GetFullPath(loaded.FixtureMarkerPath))! + Path.DirectorySeparatorChar, StringComparison.OrdinalIgnoreCase)))
+            throw new InvalidOperationException("AUTOMATION_FIXTURE_OUTSIDE_MARKER_ROOT");
+        return loaded;
+    }
+    private void Complete(bool success, string? error, bool safeToExitNow = false)
+    {
+        if (IsTerminal) return;
+        functionalCompleted = success;
+        Transition(success ? CoordinatorState.Completed : CoordinatorState.Failed, success ? "Completed" : "Failed");
+        UnsubscribeHandlers();
+        TryWriteEvidence(success, error);
+        selectedTargetSnapshotId = null;
+        pxpResults.Clear();
+        RequestControlledExit(safeToExitNow);
+    }
+
+    // The managed Application.Quit call can leave a startup-script host alive
+    // when it is invoked from a CommandEnded callback. Queue AutoCAD's native
+    // QUIT command instead; the command processor runs it after the current
+    // public PXP-OA command has fully returned and discards every open drawing.
+    private void RequestControlledExit(bool idleSafe = false)
+    {
+        if (exitQueued) return;
+        exitQueued = true;
+        Transition(CoordinatorState.ExitQueued, "ExitQueued");
+        if (idleSafe)
+        {
+            DispatchNativeQuit();
+            return;
+        }
+        AcadApplication.Idle += OnExitIdle;
+        exitHandlerSubscribed = true;
+    }
+
+    private void OnExitIdle(object? sender, EventArgs args)
+    {
+        RunCallback("ControlledExitIdle", DispatchNativeQuit);
+    }
+
+    private void DispatchNativeQuit()
+    {
+        try
+        {
+            if (exitHandlerSubscribed) AcadApplication.Idle -= OnExitIdle;
+            exitHandlerSubscribed = false;
+            exitAttemptQueued = true;
+            if (!AcadApplication.IsQuiescent)
+            {
+                transitions.Add("QuitDispatchDeferredNotQuiescent");
+                TryWriteEvidence(functionalCompleted, null);
+                return;
+            }
+            // LifecycleProbe opens no fixture document, but the real startup
+            // document is available at this point (observed as Drawing1.dwg).
+            // Use that live document only to queue native QUIT; never retain it
+            // past this callback or use it for fixture/Plant work.
+            var exitDocument = AcadApplication.DocumentManager.MdiActiveDocument;
+            if (exitDocument is null)
+            {
+                exitFailureCode = "AUTOMATION_EXIT_DOCUMENT_UNAVAILABLE";
+                transitions.Add("QuitDispatchSkippedNoLiveDocument");
+                TryWriteEvidence(functionalCompleted, null);
+                return;
+            }
+            transitions.Add("QuitDispatchAttempted");
+            // Persist the exit boundary before handing control back to AutoCAD;
+            // process termination can otherwise prevent the final evidence flush.
+            TryWriteEvidence(functionalCompleted, null);
+            exitDocument.SendStringToExecute("_.QUIT _N\n", true, true, false);
+            document = null;
+            automationOpenedDocuments.Clear();
+        }
+        catch (System.Exception exception)
+        {
+            // This is terminal cleanup: contain the exception and leave process
+            // cleanup to Launcher rather than re-entering document APIs.
+            // A failed graceful-exit dispatch is not a failure of already
+            // completed PXP-OA/UNDO work. Launcher owns bounded forced cleanup.
+            exitFailureCode = "AUTOMATION_CONTROLLED_EXIT_FAILED:" + exception.GetType().Name;
+            transitions.Add("QuitDispatchFailed");
+            TryWriteEvidence(functionalCompleted, null);
+        }
+    }
+
+    private bool IsTerminal => state is CoordinatorState.Completed or CoordinatorState.Failed or CoordinatorState.ExitQueued;
+
+    private void Transition(CoordinatorState next, string transition)
+    {
+        previousState = state;
+        state = next;
+        transitions.Add(transition);
+    }
+
+    private void RunCallback(string callback, Action action)
+    {
+        if (IsTerminal && callback != "ControlledExitIdle") return;
+        try { action(); }
+        catch (System.Exception exception) { FailFromCallback(callback, exception, "AUTOMATION_CALLBACK_FAILED"); }
+    }
+
+    private void FailFromCallback(string callback, System.Exception exception, string code)
+    {
+        exceptionText = exception.ToString();
+        RuntimeDiagnostics.Write("AutomationCallbackFailed", "ERROR", resultStatus: code + ":" + callback, exception: exception);
+        if (!IsTerminal) Complete(false, code + ":" + callback + ":" + exception.GetType().Name);
+        else
+        {
+            UnsubscribeHandlers();
+            if (functionalCompleted)
+            {
+                exitFailureCode = code + ":" + callback + ":" + exception.GetType().Name;
+                transitions.Add("ExitCallbackFailed");
+                TryWriteEvidence(true, null);
+            }
+            else TryWriteEvidence(false, code + ":" + callback + ":" + exception.GetType().Name);
+        }
+    }
+
+    private void UnsubscribeHandlers()
+    {
+        if (documentHandlersSubscribed && document is not null)
+        {
+            try { document.CommandEnded -= OnCommandEnded; document.CommandFailed -= OnCommandFailed; document.CommandCancelled -= OnCommandCancelled; }
+            catch (System.Exception exception) { RuntimeDiagnostics.Write("AutomationHandlerUnsubscribeFailed", "ERROR", resultStatus: "AUTOMATION_UNSUBSCRIBE_FAILED", exception: exception); }
+        }
+        documentHandlersSubscribed = false;
+        if (lifecycleHandlersSubscribed)
+        {
+            try { AcadApplication.DocumentManager.DocumentActivated -= OnDocumentActivated; AcadApplication.Idle -= OnIdle; }
+            catch (System.Exception exception) { RuntimeDiagnostics.Write("AutomationHandlerUnsubscribeFailed", "ERROR", resultStatus: "AUTOMATION_UNSUBSCRIBE_FAILED", exception: exception); }
+        }
+        lifecycleHandlersSubscribed = false;
+    }
+
+    private bool TryWriteEvidence(bool success, string? error)
+    {
+        try { evidenceFlushed = true; WriteEvidence(success, error); return true; }
+        catch (System.Exception exception) { evidenceFlushed = false; RuntimeDiagnostics.Write("AutomationEvidenceWriteFailed", "ERROR", resultStatus: "AUTOMATION_EVIDENCE_WRITE_FAILED", exception: exception); return false; }
+    }
+
+    private void WriteEvidence(bool success, string? error)
+    {
+        if (config is null) return;
+        var first = pxpResults.ElementAtOrDefault(0); var second = pxpResults.ElementAtOrDefault(1);
+        var expectedCommands = string.Equals(config.Phase, "Apply", StringComparison.OrdinalIgnoreCase) ? 3 : 2;
+        var evidence = new FirstApplyAutomationEvidence { Phase = config.Phase, Completed = success, ErrorCode = error, DbmodBefore = before, DbmodAfterCommand1 = after1, DbmodAfterCommand2 = after2, DbmodAfterUndo = afterUndo, Baseline = baseline, AfterCommand1 = counts1, AfterCommand2 = counts2, AfterUndo = countsUndo, CompletedCommands = completed, PlanIdRun1 = first?.PlanId, PlanIdRun2 = second?.PlanId, PlanIdsEqual = first is not null && second is not null ? string.Equals(first.PlanId, second.PlanId, StringComparison.Ordinal) : null, EligibleCandidateCount = first?.Candidates.Count, SelectedCandidateHash = selectedTargetSnapshotId, ViewHash = first?.View, CreateRun1 = first?.Create, CreateRun2 = second?.Create, SkipRun2 = second?.Skip, ApplyOutcomeRun1 = first?.ApplyOutcome, ApplyOutcomeRun2 = second?.ApplyOutcome, PermitAccepted = first?.PermitAccepted, CommandsCompleted = completed.Count >= expectedCommands, InspectorsCompleted = baseline is not null && counts1 is not null && counts2 is not null && (!string.Equals(config.Phase, "Apply", StringComparison.OrdinalIgnoreCase) || countsUndo is not null), EvidenceFlushed = evidenceFlushed, ExitAttemptQueued = exitAttemptQueued, ExitFailureCode = exitFailureCode, IdleCallbackCount = FirstLimitedApplyAutomationBootstrap.IdleCallbackCount, CoordinatorStartCount = FirstLimitedApplyAutomationBootstrap.CoordinatorStartCount, ExceptionText = exceptionText, PreviousState = previousState.ToString(), CurrentState = state.ToString(), StateTransitions = transitions };
+        Directory.CreateDirectory(Path.GetDirectoryName(config.EvidencePath)!);
+        File.WriteAllText(config.EvidencePath, JsonSerializer.Serialize(evidence));
+    }
+}

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/FirstLimitedApplyRuntime.cs

@@ -0,0 +1,113 @@
+using System.Text.Json;
+using Autodesk.AutoCAD.ApplicationServices;
+using Autodesk.AutoCAD.DatabaseServices;
+using Autodesk.AutoCAD.Geometry;
+using PRecAnnot.Abstractions;
+
+namespace PRecAnnot.Plant3D2026;
+
+// This file is deliberately runtime-only.  Core receives only the anonymised
+// permit and canonical operation; no AutoCAD handle, database or project path
+// crosses the adapter boundary.
+internal sealed record FirstLimitedApplyRuntimePermit
+{
+    public required bool AllowApply { get; init; }
+    public required string FixtureMarkerPath { get; init; }
+    public required string TargetSnapshotId { get; init; }
+    public required string ExpectedPlanId { get; init; }
+    public required string VisibilityState { get; init; }
+}
+
+internal static class FirstLimitedApplyPermitReader
+{
+    private const string MarkerContent = "P_REC_ANNOT_TEST_FIXTURE=FIRST_LIMITED_APPLY";
+
+    public static FirstLimitedApplyRuntimePermit ReadFor(Document document)
+    {
+        var path = Environment.GetEnvironmentVariable("P_REC_ANNOT_APPLY_PERMIT_PATH");
+        if (string.IsNullOrWhiteSpace(path) || !Path.IsPathFullyQualified(path) || path.StartsWith("\\\\", StringComparison.Ordinal))
+            throw new InvalidOperationException("APPLY_PERMIT_PATH_REQUIRED");
+        if (!File.Exists(path)) throw new InvalidOperationException("APPLY_PERMIT_MISSING");
+
+        var permit = JsonSerializer.Deserialize<FirstLimitedApplyRuntimePermit>(File.ReadAllText(path), new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
+        if (permit is null || !permit.AllowApply || string.IsNullOrWhiteSpace(permit.TargetSnapshotId) || string.IsNullOrWhiteSpace(permit.ExpectedPlanId) || string.IsNullOrWhiteSpace(permit.VisibilityState))
+            throw new InvalidOperationException("APPLY_TEST_FIXTURE_OR_PERMIT_REQUIRED");
+        if (!Path.IsPathFullyQualified(permit.FixtureMarkerPath) || permit.FixtureMarkerPath.StartsWith("\\\\", StringComparison.Ordinal) || !File.Exists(permit.FixtureMarkerPath))
+            throw new InvalidOperationException("APPLY_TEST_FIXTURE_OR_PERMIT_REQUIRED");
+        if (!string.Equals(File.ReadAllText(permit.FixtureMarkerPath).Trim(), MarkerContent, StringComparison.Ordinal))
+            throw new InvalidOperationException("APPLY_TEST_FIXTURE_OR_PERMIT_REQUIRED");
+
+        var root = Path.GetDirectoryName(Path.GetFullPath(permit.FixtureMarkerPath))!;
+        var drawing = Path.GetFullPath(document.Name);
+        if (!drawing.StartsWith(root + Path.DirectorySeparatorChar, StringComparison.OrdinalIgnoreCase))
+            throw new InvalidOperationException("APPLY_TEST_FIXTURE_OR_PERMIT_REQUIRED");
+        return permit;
+    }
+}
+
+internal enum PipeAnnotationWriteOutcome { Created, AlreadyExists }
+
+internal sealed class FirstLimitedPipeAnnotationWriter
+{
+    private const string BlockName = "PIPE";
+    private const string XdataApplication = "PXP-OA";
+
+    public PipeAnnotationWriteOutcome Write(Document document, CreatePipeAnnotationOperation operation, string visibilityState)
+    {
+        var database = document.Database;
+        using var transaction = database.TransactionManager.StartTransaction();
+        var table = (BlockTable)transaction.GetObject(database.BlockTableId, OpenMode.ForRead);
+        if (!table.Has(BlockName)) throw new InvalidOperationException("ANNOTATION_TEMPLATE_BLOCK_MISSING");
+
+        var paper = (BlockTableRecord)transaction.GetObject(table[BlockTableRecord.PaperSpace], OpenMode.ForWrite);
+        if (HasOwnedAnnotation(transaction, paper, operation.DuplicateKey)) return PipeAnnotationWriteOutcome.AlreadyExists;
+        EnsureRegApp(transaction, database);
+
+        using var annotation = new BlockReference(
+            new Point3d(operation.Placement.X, operation.Placement.Y, operation.Placement.Z),
+            table[BlockName]);
+        paper.AppendEntity(annotation);
+        transaction.AddNewlyCreatedDBObject(annotation, true);
+        SetConfirmedVisibility(annotation, visibilityState);
+        annotation.XData = new ResultBuffer(
+            new TypedValue((int)DxfCode.ExtendedDataRegAppName, XdataApplication),
+            new TypedValue((int)DxfCode.ExtendedDataAsciiString, operation.DuplicateKey),
+            new TypedValue((int)DxfCode.ExtendedDataAsciiString, operation.RuleId));
+        transaction.Commit();
+        return PipeAnnotationWriteOutcome.Created;
+    }
+
+    private static bool HasOwnedAnnotation(Transaction transaction, BlockTableRecord paper, string duplicateKey)
+    {
+        foreach (ObjectId id in paper)
+        {
+            if (transaction.GetObject(id, OpenMode.ForRead) is not BlockReference reference) continue;
+            using var xdata = reference.GetXDataForApplication(XdataApplication);
+            if (xdata?.AsArray().Any(value => value.TypeCode == (int)DxfCode.ExtendedDataAsciiString && string.Equals(value.Value as string, duplicateKey, StringComparison.Ordinal)) == true)
+                return true;
+        }
+        return false;
+    }
+
+    private static void EnsureRegApp(Transaction transaction, Database database)
+    {
+        var apps = (RegAppTable)transaction.GetObject(database.RegAppTableId, OpenMode.ForRead);
+        if (apps.Has(XdataApplication)) return;
+        apps.UpgradeOpen();
+        using var record = new RegAppTableRecord { Name = XdataApplication };
+        apps.Add(record);
+        transaction.AddNewlyCreatedDBObject(record, true);
+    }
+
+    // The "V" property and allowed values are the confirmed legacy PXP-OA
+    // dynamic-block contract.  Failure is pre-commit and leaves no entity.
+    private static void SetConfirmedVisibility(BlockReference annotation, string visibilityState)
+    {
+        var property = annotation.DynamicBlockReferencePropertyCollection
+            .Cast<DynamicBlockReferenceProperty>()
+            .SingleOrDefault(value => string.Equals(value.PropertyName, "V", StringComparison.Ordinal));
+        if (property is null || !property.GetAllowedValues().OfType<string>().Contains(visibilityState, StringComparer.Ordinal))
+            throw new InvalidOperationException("ANNOTATION_VISIBILITY_STATE_UNSUPPORTED");
+        property.Value = visibilityState;
+    }
+}

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/OrthoRuntimeStructureInspector.cs

@@ -0,0 +1,81 @@
+using System.Collections;
+using System.Reflection;
+using System.Security.Cryptography;
+using System.Text;
+using Autodesk.ProcessPower.Drawings2d;
+
+namespace PRecAnnot.Plant3D2026;
+
+// This is a diagnostic-only probe. It is never part of source resolution and is
+// called only by the explicit DryRun/OrthoStructure environment flag combination.
+internal static class OrthoRuntimeStructureInspector
+{
+    public static void Inspect(IDwgViewDef view)
+    {
+        if (!RuntimeDiagnostics.IsOrthoStructureDiagnosticsEnabled) return;
+
+        try
+        {
+            var query = view.DwgQuery;
+            var modelFiles = query?.ModelFiles;
+            var details = new Dictionary<string, object?>
+            {
+                ["ViewRuntimeType"] = TypeName(view.GetType()),
+                ["DwgQueryRuntimeType"] = query is null ? null : TypeName(query.GetType()),
+                ["ModelFilesDeclaredType"] = typeof(ModelFile[]).FullName,
+                ["ModelFilesRuntimeType"] = modelFiles?.GetType().AssemblyQualifiedName,
+                ["ModelFilesCount"] = modelFiles?.Length ?? 0,
+                ["ModelFileElements"] = modelFiles?.Select(DescribeModelFile).ToArray() ?? Array.Empty<IReadOnlyDictionary<string, object?>>()
+            };
+            RuntimeDiagnostics.Write("OrthoRuntimeStructureInspected", resultStatus: "Captured", details: details);
+        }
+        catch (Exception exception)
+        {
+            RuntimeDiagnostics.Write("OrthoRuntimeStructureInspectionFailed", "WARNING", resultStatus: "Failed", exception: exception);
+        }
+    }
+
+    private static IReadOnlyDictionary<string, object?> DescribeModelFile(ModelFile? modelFile)
+    {
+        if (modelFile is null)
+        {
+            return new Dictionary<string, object?> { ["IsNull"] = true };
+        }
+
+        var properties = modelFile.GetType()
+            .GetProperties(BindingFlags.Instance | BindingFlags.Public)
+            .Where(property => property.CanRead && property.GetIndexParameters().Length == 0)
+            .OrderBy(property => property.Name, StringComparer.Ordinal)
+            .Select(property => DescribeProperty(modelFile, property))
+            .ToArray();
+        return new Dictionary<string, object?>
+        {
+            ["RuntimeType"] = TypeName(modelFile.GetType()),
+            ["Properties"] = properties
+        };
+    }
+
+    private static IReadOnlyDictionary<string, object?> DescribeProperty(ModelFile modelFile, PropertyInfo property)
+    {
+        object? value;
+        try { value = property.GetValue(modelFile); }
+        catch { value = null; }
+        return new Dictionary<string, object?>
+        {
+            ["PropertyName"] = property.Name,
+            ["PropertyType"] = property.PropertyType.FullName,
+            ["ValueKind"] = value?.GetType().FullName ?? "null",
+            ["IsNull"] = value is null,
+            ["StringLength"] = value is string text ? text.Length : null,
+            ["PathKind"] = property.Name == "ModelFileName" && value is string path
+                ? (Path.IsPathRooted(path) ? "Absolute" : "ProjectRelative")
+                : null,
+            ["CollectionCount"] = value is ICollection collection ? collection.Count : null,
+            ["StableHash"] = value is null ? null : Hash(value.ToString() ?? string.Empty)
+        };
+    }
+
+    private static string TypeName(Type type) => $"{type.FullName}, {type.Assembly.GetName().Name}, {type.Assembly.GetName().Version}";
+
+    private static string Hash(string value) => Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes(value)))[..16];
+}

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/PRecAnnot.Plant3D2026.csproj

@@ -14,7 +14,9 @@
     <Reference Include="PnPDataObjects"><HintPath>$(AutoCAD2026ManagedDir)\PnPDataObjects.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
     <Reference Include="PnPProjectManagerMgd"><HintPath>$(Plant3D2026ManagedDir)\PnPProjectManagerMgd.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
     <Reference Include="PnP3dObjectsMgd"><HintPath>$(Plant3D2026ManagedDir)\PnP3dObjectsMgd.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
+    <Reference Include="PnP3dProjectPartsMgd"><HintPath>$(Plant3D2026ManagedDir)\PnP3dProjectPartsMgd.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
     <Reference Include="PnP3dOrthoProjectPart"><HintPath>$(Plant3D2026ManagedDir)\PnP3dOrthoProjectPart.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
     <Reference Include="PnPDwg2dDef"><HintPath>$(Plant3D2026ManagedDir)\PnPDwg2dDef.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
+    <Reference Include="PnPDwg2dUtil"><HintPath>$(Plant3D2026ManagedDir)\PnPDwg2dUtil.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
   </ItemGroup>
 </Project>

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/PlantReadPath.cs

@@ -1,8 +1,11 @@
 using System.Security.Cryptography;
+using System.Collections.Specialized;
 using System.Text;
 using Autodesk.AutoCAD.ApplicationServices;
 using Autodesk.AutoCAD.DatabaseServices;
 using Autodesk.ProcessPower.DataLinks;
+using Autodesk.ProcessPower.Drawings2d;
+using Autodesk.ProcessPower.PnP3dObjects;
 using Autodesk.ProcessPower.P3dProjectParts;
 using Autodesk.ProcessPower.PlantInstance;
 using Autodesk.ProcessPower.ProjectManager;
@@ -13,9 +16,11 @@ namespace PRecAnnot.Plant3D2026;
 
 internal sealed class PlantRuntimeContextReader : IPlantRuntimeContextReader
 {
-    public PlantRuntimeContext ReadCurrentContext()
+    public PlantRuntimeContext ReadCurrentContext() => ReadCurrentContext(null);
+
+    public PlantRuntimeContext ReadCurrentContext(Document? explicitDocument = null)
     {
-        var document = AcadApplication.DocumentManager.MdiActiveDocument;
+        var document = explicitDocument ?? AcadApplication.DocumentManager.MdiActiveDocument;
         if (document is null)
         {
             return Empty(false, false, "NO_ACTIVE_DOCUMENT", "Активный документ отсутствует.");
@@ -151,50 +156,136 @@ internal sealed class PlantOrthoViewportReader : IOrthoViewportReader
         return "vp-" + Convert.ToHexString(hash)[..20];
     }
 
-    private static string? ReadSourceDrawingPath(object view)
+    private static string? ReadSourceDrawingPath(IDwgViewDef view)
     {
-        // The Plant 3D 2026 view definition owns a DwgQuery. Its ModelFiles are
+        // Confirmed Plant 3D 2026 contract (PnPDwg2dDef/PnPDwg2dUtil):
-        // the authoritative source-model references; sheet.DwgName is the Ortho
+        // IDwgViewDef.DwgQuery -> IDwgQuery.ModelFiles -> ModelFile.ModelFileName.
-        // sheet and must not be used for Piping DataLinks.
+        // The Ortho sheet is never used as a Piping DataLinks source.
         try
         {
-            var query = view.GetType().GetProperty("DwgQuery")?.GetValue(view);
+            if (!OrthoModelFilesContract.IsSupported(view, out var diagnostic))
-            var files = query?.GetType().GetProperty("ModelFiles")?.GetValue(query) as System.Collections.IEnumerable;
-            if (files is null) return null;
-            foreach (var file in files)
             {
-                var value = file as string
+                RuntimeDiagnostics.Write("OrthoModelFilesContractRejected", "WARNING", resultStatus: diagnostic.Code, details: diagnostic.Details);
-                    ?? file?.GetType().GetProperty("ModelFileName")?.GetValue(file)?.ToString()
+                return null;
-                    ?? file?.GetType().GetProperty("Value")?.GetValue(file)?.ToString();
-                if (!string.IsNullOrWhiteSpace(value)) return value;
             }
+
+            if (RuntimeDiagnostics.IsOrthoStructureDiagnosticsEnabled)
+            {
+                OrthoRuntimeStructureInspector.Inspect(view);
+            }
+
+            return view.DwgQuery?.ModelFiles
+                .Select(file => file.ModelFileName)
+                .FirstOrDefault(value => !string.IsNullOrWhiteSpace(value));
+        }
+        catch (Exception exception)
+        {
+            RuntimeDiagnostics.Write("OrthoModelFilesReadFailed", "WARNING", resultStatus: "ORTHO_MODEL_FILES_API_UNSUPPORTED", exception: exception);
         }
-        catch { }
         return null;
     }
 }
 
+internal static class OrthoModelFilesContract
+{
+    private const string ExpectedViewType = "Autodesk.ProcessPower.Drawings2d.DwgViewDef";
+    private const string ExpectedQueryType = "Autodesk.ProcessPower.Drawings2d.DwgQueryByBox";
+    private const string ExpectedModelFileType = "Autodesk.ProcessPower.Drawings2d.ModelFile";
+    private const string ExpectedDefAssembly = "PnPDwg2dDef";
+    private const string ExpectedUtilAssembly = "PnPDwg2dUtil";
+    private const string ExpectedVersion = "0.0.0.0";
+
+    public static bool IsSupported(IDwgViewDef view, out OrthoModelFilesContractDiagnostic diagnostic)
+    {
+        var query = view.DwgQuery;
+        var files = query?.ModelFiles;
+        var valid = HasExpectedType(view, ExpectedViewType, ExpectedDefAssembly) &&
+                    query is not null && HasExpectedType(query, ExpectedQueryType, ExpectedDefAssembly) &&
+                    files is not null && files.GetType() == typeof(ModelFile[]) &&
+                    files.All(file => file is not null && HasExpectedType(file, ExpectedModelFileType, ExpectedUtilAssembly));
+        diagnostic = new OrthoModelFilesContractDiagnostic(
+            valid ? "ORTHO_MODEL_FILES_API_SUPPORTED" : "ORTHO_MODEL_FILES_API_UNSUPPORTED",
+            new Dictionary<string, object?>
+            {
+                ["ExpectedViewType"] = ExpectedViewType,
+                ["ActualViewType"] = TypeName(view),
+                ["ExpectedQueryType"] = ExpectedQueryType,
+                ["ActualQueryType"] = query is null ? null : TypeName(query),
+                ["ExpectedModelFileType"] = ExpectedModelFileType,
+                ["ActualModelFilesType"] = files?.GetType().AssemblyQualifiedName,
+                ["ExpectedAssemblyVersion"] = ExpectedVersion,
+                ["ActualViewAssemblyVersion"] = view.GetType().Assembly.GetName().Version?.ToString(),
+                ["ActualQueryAssemblyVersion"] = query?.GetType().Assembly.GetName().Version?.ToString(),
+                ["ActualModelFilesAssemblyVersion"] = files?.GetType().Assembly.GetName().Version?.ToString()
+            });
+        return valid;
+    }
+
+    private static bool HasExpectedType(object value, string expectedType, string expectedAssembly) =>
+        string.Equals(value.GetType().FullName, expectedType, StringComparison.Ordinal) &&
+        string.Equals(value.GetType().Assembly.GetName().Name, expectedAssembly, StringComparison.Ordinal) &&
+        string.Equals(value.GetType().Assembly.GetName().Version?.ToString(), ExpectedVersion, StringComparison.Ordinal);
+
+    private static string TypeName(object value) => $"{value.GetType().FullName}, {value.GetType().Assembly.GetName().Name}, {value.GetType().Assembly.GetName().Version}";
+}
+
+internal sealed record OrthoModelFilesContractDiagnostic(string Code, IReadOnlyDictionary<string, object?> Details);
+
 internal sealed class PlantObjectReader : IPlantObjectReader
 {
     public IReadOnlyList<PlantObjectSnapshot> ReadObjects(OrthoViewportInfo viewport, CancellationToken cancellationToken)
     {
-        var document = AcadApplication.DocumentManager.MdiActiveDocument;
+        if (string.IsNullOrWhiteSpace(viewport.SourceDrawingName))
-        if (document is null || string.IsNullOrWhiteSpace(viewport.SourceDrawingName)) return Array.Empty<PlantObjectSnapshot>();
+        {
+            WriteOutcome("ORTHO_SOURCE_DRAWING_NOT_RESOLVED", viewport);
+            return Array.Empty<PlantObjectSnapshot>();
+        }
+
+        PipingProject? pipingProject;
+        try { pipingProject = PlantApplication.ProjectPart("Piping") as PipingProject; }
+        catch (Exception exception)
+        {
+            WriteOutcome("PIPING_PROJECT_PART_NOT_FOUND", viewport, exception);
+            return Array.Empty<PlantObjectSnapshot>();
+        }
+        if (pipingProject is null)
+        {
+            WriteOutcome("PIPING_PROJECT_PART_NOT_FOUND", viewport);
+            return Array.Empty<PlantObjectSnapshot>();
+        }
+
+        var sourceDrawing = ResolveProjectDrawing(pipingProject, viewport.SourceDrawingName);
+        if (sourceDrawing is null) return Array.Empty<PlantObjectSnapshot>();
 
         DataLinksManager? dataLinks;
-        try { dataLinks = PlantApplication.ProjectPart("Piping")?.DataLinksManager; }
+        try { dataLinks = pipingProject.DataLinksManager; }
-        catch { return Array.Empty<PlantObjectSnapshot>(); }
+        catch (Exception exception)
-        if (dataLinks is null) return Array.Empty<PlantObjectSnapshot>();
+        {
-
+            WriteOutcome("SOURCE_DATALINKS_UNAVAILABLE", viewport, exception);
-        if (!Path.IsPathRooted(viewport.SourceDrawingName) || !File.Exists(viewport.SourceDrawingName)) return Array.Empty<PlantObjectSnapshot>();
+            return Array.Empty<PlantObjectSnapshot>();
+        }
+        if (dataLinks is null)
+        {
+            WriteOutcome("SOURCE_DATALINKS_UNAVAILABLE", viewport);
+            return Array.Empty<PlantObjectSnapshot>();
+        }
 
         var snapshots = new List<PlantObjectSnapshot>();
         try
         {
-            using var sourceDatabase = new Database(false, true);
+            // Confirmed Plant 3D 2026 contract: resolve the source model to the
-            sourceDatabase.ReadDwgFile(viewport.SourceDrawingName, FileShare.ReadWrite, true, null);
+            // Piping project drawing record, then read its DataLinks by drawing Id.
-            sourceDatabase.CloseInput(true);
+            // The active Ortho database is deliberately never passed to DataLinks.
-            foreach (var rowId in dataLinks.SelectAcPpRowIds(sourceDatabase))
+            var rowIds = dataLinks.SelectAcPpRowIds(sourceDrawing.Id);
+            if (rowIds.Count == 0)
+            {
+                WriteOutcome("SOURCE_DATALINKS_NO_ROWS", viewport, details: new Dictionary<string, object?> { ["ProjectDrawingResolved"] = true });
+                return Array.Empty<PlantObjectSnapshot>();
+            }
+
+            var membership = PlantViewportMembershipReader.Read(viewport, dataLinks, rowIds);
+
+            foreach (var rowId in rowIds)
             {
                 try
                 {
@@ -212,25 +303,85 @@ internal sealed class PlantObjectReader : IPlantObjectReader
                         LineNumber = Value("Line Number", "LineNumber", "LINENUMBER"),
                         SupportNumber = Value("Support Number", "SupportNumber"),
                         EquipmentNumber = Value("Equipment Number", "EquipmentNumber"),
-                        Geometry = new GeometrySnapshot(),
+                        Geometry = membership.GeometryFor(rowId),
                         Properties = properties.ToDictionary(x => x.Key, x => (string?)x.Value, StringComparer.OrdinalIgnoreCase),
-                        Diagnostics = new[] { "GEOMETRY_NOT_MAPPED" }
+                        Diagnostics = new[] { "GEOMETRY_NOT_MAPPED" },
+                        MembershipStatus = membership.StatusFor(rowId),
+                        MembershipEvidenceCodes = membership.EvidenceFor(rowId)
                     });
                 }
-                catch
+                catch (Exception exception)
                 {
-                    // Keep the read path best-effort; no write operation is attempted.
+                    RuntimeDiagnostics.Write("SourceDataLinksRowReadFailed", "WARNING", resultStatus: "SOURCE_DATABASE_READ_FAILED", exception: exception);
                 }
             }
         }
-        catch (DLException)
+        catch (DLException exception)
         {
-            // An Ortho sheet can have no direct Piping DataLinks rows. The caller
+            WriteOutcome("SOURCE_DATALINKS_UNAVAILABLE", viewport, exception);
-            // receives an empty read-only result rather than a command failure.
         }
+        catch (Exception exception)
+        {
+            WriteOutcome("SOURCE_DATABASE_READ_FAILED", viewport, exception);
+        }
+
+        WriteOutcome(snapshots.Count == 0 ? "SOURCE_PIPE_ROWS_NOT_FOUND" : "SOURCE_DATALINKS_READ", viewport,
+            details: new Dictionary<string, object?> { ["SourcePlantObjectsRead"] = snapshots.Count, ["PipeObjectsRead"] = snapshots.Count });
         return snapshots.OrderBy(x => x.SnapshotId, StringComparer.Ordinal).ToArray();
     }
 
+    private static PnPProjectDrawing? ResolveProjectDrawing(PipingProject pipingProject, string sourceDrawingPath)
+    {
+        if (!Path.IsPathRooted(sourceDrawingPath))
+        {
+            WriteOutcome("ORTHO_SOURCE_DRAWING_NOT_IN_PROJECT", null);
+            return null;
+        }
+
+        string normalizedSource;
+        try { normalizedSource = Path.GetFullPath(sourceDrawingPath); }
+        catch (Exception exception)
+        {
+            WriteOutcome("ORTHO_SOURCE_DRAWING_NOT_RESOLVED", null, exception);
+            return null;
+        }
+
+        var matches = pipingProject.GetPnPDrawingFiles()
+            .Where(drawing => MatchesSourcePath(drawing, normalizedSource))
+            .OrderBy(drawing => drawing.Id)
+            .ToArray();
+        if (matches.Length == 1)
+        {
+            RuntimeDiagnostics.Write("SourceProjectDrawingResolved", resultStatus: "SOURCE_FROM_PROJECT_DRAWING_ROW", details: new Dictionary<string, object?> { ["ProjectDrawingResolved"] = true });
+            return matches[0];
+        }
+
+        WriteOutcome(matches.Length == 0 ? "ORTHO_SOURCE_DRAWING_NOT_IN_PROJECT" : "ORTHO_SOURCE_DRAWING_AMBIGUOUS", null,
+            details: new Dictionary<string, object?> { ["CandidateCount"] = matches.Length });
+        return null;
+    }
+
+    private static bool MatchesSourcePath(PnPProjectDrawing drawing, string normalizedSource) =>
+        EquivalentPath(drawing.AbsoluteFileName, normalizedSource) ||
+        EquivalentPath(drawing.ResolvedFilePath, normalizedSource);
+
+    private static bool EquivalentPath(string? candidate, string normalizedSource)
+    {
+        if (string.IsNullOrWhiteSpace(candidate)) return false;
+        try { return string.Equals(Path.GetFullPath(candidate), normalizedSource, StringComparison.OrdinalIgnoreCase); }
+        catch { return false; }
+    }
+
+    private static void WriteOutcome(string code, OrthoViewportInfo? viewport, Exception? exception = null, IReadOnlyDictionary<string, object?>? details = null)
+    {
+        var sanitizedDetails = new Dictionary<string, object?>
+        {
+            ["SourceResolved"] = viewport?.SourceDrawingName is not null
+        };
+        if (details is not null) foreach (var detail in details) sanitizedDetails[detail.Key] = detail.Value;
+        RuntimeDiagnostics.Write("SourceDataLinksReadCompleted", code == "SOURCE_DATALINKS_READ" ? "INFO" : "WARNING", resultStatus: code, exception: exception, details: sanitizedDetails);
+    }
+
     private static string StableId(string drawingName, int rowId, string? className)
     {
         var hash = SHA256.HashData(Encoding.UTF8.GetBytes($"{drawingName}|{rowId}|{className}"));
@@ -238,11 +389,139 @@ internal sealed class PlantObjectReader : IPlantObjectReader
     }
 }
 
+internal sealed class PlantViewportMembershipReader
+{
+    internal readonly record struct MembershipReadResult(
+        IReadOnlySet<int> SelectedRows,
+        ViewMembershipStatus DefaultStatus,
+        string DefaultCode,
+        IReadOnlyDictionary<int, GeometrySnapshot>? Geometry = null)
+    {
+        public ViewMembershipStatus StatusFor(int rowId) =>
+            DefaultStatus == ViewMembershipStatus.Resolved && !SelectedRows.Contains(rowId)
+                ? ViewMembershipStatus.ObjectOutsideView
+                : DefaultStatus;
+
+        public IReadOnlyList<string> EvidenceFor(int rowId) =>
+            DefaultStatus == ViewMembershipStatus.Resolved && !SelectedRows.Contains(rowId)
+                ? new[] { "VIEW_MEMBERSHIP_OBJECT_OUTSIDE_CLIP" }
+                : new[] { DefaultCode };
+
+        public GeometrySnapshot GeometryFor(int rowId) =>
+            Geometry is not null && Geometry.TryGetValue(rowId, out var geometry)
+                ? geometry
+                : new GeometrySnapshot();
+    }
+
+    internal static MembershipReadResult Read(OrthoViewportInfo viewport, DataLinksManager dataLinks, Autodesk.ProcessPower.DataObjects.PnPRowIdArray sourceRows)
+    {
+        try
+        {
+            var project = PlantApplication.ProjectPart("Ortho") as OrthoProject;
+            if (project is null) return Unsupported("VIEW_MEMBERSHIP_API_UNSUPPORTED");
+
+            var candidates = project.DwgSheetDefinitions.AsArray()
+                .SelectMany(sheet => sheet.DwgViewDefs.AsArray()
+                    .Where(view => string.Equals(StableId(sheet.DwgGuid.ToString(), view.ViewName), viewport.Id, StringComparison.Ordinal))
+                    .Select(view => (sheet, view)))
+                .ToArray();
+            if (candidates.Length != 1) return Unsupported("VIEW_MEMBERSHIP_API_UNSUPPORTED");
+
+            var view = candidates[0].view;
+            if (!OrthoModelFilesContract.IsSupported(view, out var diagnostic))
+            {
+                RuntimeDiagnostics.Write("ViewportMembershipContractRejected", "WARNING", resultStatus: diagnostic.Code, details: diagnostic.Details);
+                return Unsupported("VIEW_MEMBERSHIP_API_UNSUPPORTED");
+            }
+
+            var selectedRows = new HashSet<int>();
+            var geometry = new Dictionary<int, GeometrySnapshot>();
+            var selected = view.DwgQuery.Execute(new StringCollection(), new StringCollection());
+            for (var index = 0; index < selected.Count; index++)
+            {
+                Autodesk.ProcessPower.Drawings2d.MdObjectId sourceId = default;
+                if (!selected.GetItem(index, ref sourceId) || sourceId.IsNull || sourceId.PrjObjectId.IsNull) continue;
+                try
+                {
+                    var rowId = dataLinks.FindAcPpRowId(sourceId.PrjObjectId);
+                    if (sourceRows.Contains(rowId))
+                    {
+                        selectedRows.Add(rowId);
+                        if (TryReadPipePlacement(sourceId, dataLinks, out var placement)) geometry[rowId] = placement;
+                    }
+                }
+                catch (DLException)
+                {
+                    // A generated entity without a Piping DataLinks row is outside this reader's source set.
+                }
+            }
+
+            RuntimeDiagnostics.Write("ViewportMembershipReadCompleted", "INFO", resultStatus: "VIEW_MEMBERSHIP_FROM_CONFIRMED_PNP_ID", details: new Dictionary<string, object?>
+            {
+                ["SelectedSourceRows"] = selectedRows.Count,
+                ["SourceRows"] = sourceRows.Count
+            });
+            return new MembershipReadResult(selectedRows, ViewMembershipStatus.Resolved, "VIEW_MEMBERSHIP_FROM_CONFIRMED_PNP_ID", geometry);
+        }
+        catch (Exception exception)
+        {
+            RuntimeDiagnostics.Write("ViewportMembershipReadCompleted", "WARNING", resultStatus: "VIEW_MEMBERSHIP_API_UNSUPPORTED", exception: exception);
+            return Unsupported("VIEW_MEMBERSHIP_API_UNSUPPORTED");
+        }
+    }
+
+    private static MembershipReadResult Unsupported(string code) => new(new HashSet<int>(), ViewMembershipStatus.NotResolved, code);
+
+    // Confirmed Plant 3D 2026 linkage: DwgQuery.Execute returns MdObjectId,
+    // whose PrjObjectId identifies the source entity and whose Xform projects
+    // that source entity into the particular Ortho view.  This is not a sheet
+    // coordinate heuristic.
+    private static bool TryReadPipePlacement(MdObjectId sourceId, DataLinksManager dataLinks, out GeometrySnapshot geometry)
+    {
+        geometry = new GeometrySnapshot();
+        try
+        {
+            var openedByQuery = false;
+            var sourceDatabase = sourceId.GetDatabase(false, ref openedByQuery);
+            try
+            {
+                using var transaction = sourceDatabase.TransactionManager.StartOpenCloseTransaction();
+                var objectId = dataLinks.MakeAcDbObjectId(sourceId.PrjObjectId, sourceDatabase);
+                if (transaction.GetObject(objectId, OpenMode.ForRead) is not Pipe pipe) return false;
+                var point = pipe.StartPoint.TransformBy(sourceId.Xform);
+                geometry = new GeometrySnapshot
+                {
+                    PaperPosition = new Point2Dto(point.X, point.Y),
+                    Rotation = 0
+                };
+                return true;
+            }
+            finally
+            {
+                if (openedByQuery) sourceDatabase.Dispose();
+            }
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    // Ortho viewport IDs are generated by PlantOrthoViewportReader from exactly this pair.
+    // Only an exact regenerated ID is accepted; the reader never chooses an arbitrary view.
+    private static string StableId(string sheetId, string? viewName)
+    {
+        var hash = SHA256.HashData(Encoding.UTF8.GetBytes(sheetId + "|" + (viewName ?? string.Empty)));
+        return "vp-" + Convert.ToHexString(hash)[..20];
+    }
+
+}
+
 internal sealed class RuntimeWriteGuard(PRecAnnotExecutionMode mode) : IRuntimeWriteGuard
 {
     public void EnsureWriteAllowed(string operation)
     {
-        if (mode == PRecAnnotExecutionMode.Apply) throw new InvalidOperationException("APPLY_MODE_NOT_IMPLEMENTED");
+        if (mode == PRecAnnotExecutionMode.Apply) return;
         throw new InvalidOperationException("SMOKE_WRITE_BLOCKED");
     }
 }

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/RuntimeDiagnostics.cs

@@ -14,6 +14,10 @@ internal static class RuntimeDiagnostics
 
     public static string RuntimeMode => Environment.GetEnvironmentVariable("P_REC_ANNOT_RUNTIME_MODE") ?? "Normal";
 
+    public static bool IsOrthoStructureDiagnosticsEnabled =>
+        string.Equals(RuntimeMode, "DryRun", StringComparison.OrdinalIgnoreCase) &&
+        string.Equals(Environment.GetEnvironmentVariable("P_REC_ANNOT_DIAGNOSTICS"), "OrthoStructure", StringComparison.OrdinalIgnoreCase);
+
     public static void Write(
         string eventType,
         string level = "INFO",

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/ScriptDrivenFirstApplyAutomation.cs

@@ -0,0 +1,141 @@
+using System.Text.Json;
+using Autodesk.AutoCAD.ApplicationServices;
+using Autodesk.AutoCAD.DatabaseServices;
+using Autodesk.AutoCAD.Runtime;
+using Autodesk.ProcessPower.PlantInstance;
+using Autodesk.ProcessPower.ProjectManager;
+using AcadApplication = Autodesk.AutoCAD.ApplicationServices.Application;
+
+namespace PRecAnnot.Plant3D2026;
+
+// Test-only observer. The AutoCAD /b processor, never this type, drives PXP-OA.
+internal static class ScriptDrivenFirstApplyAutomation
+{
+    private sealed record Config(string Phase, string OrthoDrawingPath, string EvidencePath, string FixtureMarkerPath);
+    private sealed record Run(int Sequence, string? PlanId, IReadOnlyList<string> Candidates, string? View, int Create, int Skip, int? DbmodBefore, int? DbmodAfter, AutomationEntityCounts? Before, AutomationEntityCounts? After, bool WillStart, bool Ended, bool Failed, bool Cancelled, int? SourceRows, int? MembershipResolved);
+    private static Config? config;
+    private static Document? fixture;
+    private static Database? database;
+    private static AutomationEntityCounts? baseline;
+    private static int? dbmodBaseline;
+    private static readonly List<Run> runs = [];
+    private static readonly List<string> transitions = [];
+    private static bool prepared;
+    private static bool terminal;
+
+    internal static void Prepare()
+    {
+        try
+        {
+            if (terminal) return;
+            config = ReadConfig();
+            RequireGate(config);
+            var active = AcadApplication.DocumentManager.MdiActiveDocument ?? throw new InvalidOperationException("AUTOMATION_ACTIVE_DOCUMENT_MISSING");
+            if (!SamePath(active.Name, config.OrthoDrawingPath)) throw new InvalidOperationException("AUTOMATION_UNEXPECTED_ACTIVE_FIXTURE");
+            fixture = active;
+            database = active.Database ?? throw new InvalidOperationException("AUTOMATION_FIXTURE_DATABASE_MISSING");
+            fixture.CommandWillStart += OnWillStart;
+            fixture.CommandEnded += OnEnded;
+            fixture.CommandFailed += OnFailed;
+            fixture.CommandCancelled += OnCancelled;
+            var projectXml = Path.Combine(Path.GetDirectoryName(config.FixtureMarkerPath)!, "Project.xml");
+            if (!File.Exists(projectXml)) throw new InvalidOperationException("AUTOMATION_PROJECT_XML_MISSING");
+            var project = PlantProject.LoadProject(projectXml, false, string.Empty, string.Empty);
+            PlantApplication.SetCurrentProject(project, true);
+            var context = new PlantRuntimeContextReader().ReadCurrentContext(fixture);
+            if (!context.HasPlantProject || !context.IsOrthoDrawing || context.Viewports.Count != 1)
+                throw new InvalidOperationException("AUTOMATION_ORTHO_CONTEXT_INVALID");
+            dbmodBaseline = Dbmod();
+            baseline = Counts(database);
+            prepared = true;
+            transitions.Add("Prepared");
+            Write(false, null);
+        }
+        catch (System.Exception exception) { Fail("AUTOMATION_PREPARE_FAILED", exception); }
+    }
+
+    internal static void RecordPxpOa(string? planId, IReadOnlyList<string> candidates, string? view, int create, int skip, bool? permitAccepted, int sourceRows, int membershipResolved)
+    {
+        if (!prepared || terminal || runs.Count == 0) return;
+        var last = runs[^1];
+        if (!last.WillStart || last.PlanId is not null) return;
+        runs[^1] = last with { PlanId = planId, Candidates = candidates, View = view, Create = create, Skip = skip, SourceRows = sourceRows, MembershipResolved = membershipResolved };
+    }
+
+    internal static void FinalizePreview()
+    {
+        try
+        {
+            if (!prepared) throw new InvalidOperationException("AUTOMATION_NOT_PREPARED");
+            if (runs.Count != 2) throw new InvalidOperationException("AUTOMATION_EXPECTS_EXACTLY_TWO_PXP_OA");
+            if (runs.Any(x => !x.WillStart || !x.Ended || x.Failed || x.Cancelled)) throw new InvalidOperationException("AUTOMATION_PXP_OA_NOT_ENDED");
+            if (runs.Any(x => string.IsNullOrWhiteSpace(x.PlanId)) || !string.Equals(runs[0].PlanId, runs[1].PlanId, StringComparison.Ordinal)) throw new InvalidOperationException("AUTOMATION_PLAN_IDS_DIFFER");
+            if (runs.Any(x => x.Create != 1)) throw new InvalidOperationException("AUTOMATION_PREVIEW_CREATE_NOT_ONE");
+            if (runs[0].Candidates.Count == 0) throw new InvalidOperationException("AUTOMATION_NO_ELIGIBLE_CANDIDATE");
+            if (Dbmod() != dbmodBaseline || !Equals(Counts(database!), baseline)) throw new InvalidOperationException("AUTOMATION_INSPECTOR_INVARIANCE_FAILED");
+            terminal = true;
+            transitions.Add("PreviewCompleted");
+            Write(true, null);
+            Unsubscribe();
+        }
+        catch (System.Exception exception) { Fail("PREVIEW_ACCEPTANCE_FAILED", exception); }
+    }
+
+    private static void OnWillStart(object sender, CommandEventArgs args)
+    {
+        Guard(() =>
+        {
+            if (!IsFixture(sender) || !IsPxp(args.GlobalCommandName) || runs.Count >= 2) return;
+            runs.Add(new Run(runs.Count + 1, null, [], null, 0, 0, Dbmod(), null, Counts(database!), null, true, false, false, false, null, null));
+            transitions.Add("PxpOaWillStart:" + runs.Count);
+        });
+    }
+    private static void OnEnded(object sender, CommandEventArgs args) => Finish(sender, args, false, false);
+    private static void OnFailed(object sender, CommandEventArgs args) => Finish(sender, args, true, false);
+    private static void OnCancelled(object sender, CommandEventArgs args) => Finish(sender, args, false, true);
+    private static void Finish(object sender, CommandEventArgs args, bool failed, bool cancelled)
+    {
+        Guard(() =>
+        {
+            if (!IsFixture(sender) || !IsPxp(args.GlobalCommandName) || runs.Count == 0) return;
+            var last = runs[^1];
+            if (last.Ended || last.Failed || last.Cancelled) return;
+            runs[^1] = last with { Ended = !failed && !cancelled, Failed = failed, Cancelled = cancelled, DbmodAfter = Dbmod(), After = Counts(database!) };
+            transitions.Add(failed ? "PxpOaFailed" : cancelled ? "PxpOaCancelled" : "PxpOaEnded:" + last.Sequence);
+            Write(false, null);
+        });
+    }
+    private static bool IsFixture(object sender) => !terminal && fixture is not null && ReferenceEquals(sender, fixture) && database is not null && ReferenceEquals(fixture.Database, database);
+    private static bool IsPxp(string name) => string.Equals(name.TrimStart('.', '_'), "PXP-OA", StringComparison.OrdinalIgnoreCase);
+    private static void Guard(Action action) { try { if (!terminal) action(); } catch (System.Exception ex) { Fail("AUTOMATION_EVENT_HANDLER_FAILED", ex); } }
+    private static void Fail(string code, System.Exception exception) { if (terminal) return; terminal = true; transitions.Add("Failed:" + code); try { Write(false, code + ":" + exception); } finally { Unsubscribe(); } }
+    private static void Unsubscribe() { if (fixture is null) return; try { fixture.CommandWillStart -= OnWillStart; fixture.CommandEnded -= OnEnded; fixture.CommandFailed -= OnFailed; fixture.CommandCancelled -= OnCancelled; } catch { } }
+    private static int? Dbmod() { try { return Convert.ToInt32(AcadApplication.GetSystemVariable("DBMOD")); } catch { return null; } }
+    private static AutomationEntityCounts Counts(Database db)
+    {
+        using var tx = db.TransactionManager.StartTransaction();
+        var space = (BlockTableRecord)tx.GetObject(db.CurrentSpaceId, OpenMode.ForRead);
+        var total = 0; var pipes = 0; var xdata = 0; var owned = 0;
+        foreach (ObjectId id in space) { if (tx.GetObject(id, OpenMode.ForRead) is not Entity entity) continue; total++; if (entity is BlockReference br && string.Equals(br.Name, "PIPE", StringComparison.OrdinalIgnoreCase)) pipes++; if (entity.XData is not null) { foreach (TypedValue value in entity.XData) if (value.Value is string text && string.Equals(text, "PXP-OA", StringComparison.OrdinalIgnoreCase)) { xdata++; owned++; break; } } }
+        return new(total, pipes, xdata, owned);
+    }
+    private static Config ReadConfig()
+    {
+        var path = Environment.GetEnvironmentVariable("P_REC_ANNOT_AUTOMATION_CONFIG") ?? throw new InvalidOperationException("AUTOMATION_CONFIG_MISSING");
+        using var json = JsonDocument.Parse(File.ReadAllText(path)); var root = json.RootElement;
+        return new(root.GetProperty("phase").GetString() ?? "Preview", root.GetProperty("orthoDrawingPath").GetString() ?? throw new InvalidOperationException("AUTOMATION_ORTHO_PATH_REQUIRED"), root.GetProperty("evidencePath").GetString() ?? throw new InvalidOperationException("AUTOMATION_EVIDENCE_PATH_REQUIRED"), root.GetProperty("fixtureMarkerPath").GetString() ?? throw new InvalidOperationException("AUTOMATION_MARKER_PATH_REQUIRED"));
+    }
+    private static void RequireGate(Config value)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("P_REC_ANNOT_AUTOMATION"), "FirstLimitedApplyRuntimeTest", StringComparison.Ordinal) || !string.Equals(Environment.GetEnvironmentVariable("P_REC_ANNOT_LAUNCHER_MODE"), "NextPilot", StringComparison.Ordinal) || !File.Exists(value.FixtureMarkerPath)) throw new InvalidOperationException("AUTOMATION_GATE_REJECTED");
+    }
+    private static bool SamePath(string left, string right) => string.Equals(Path.GetFullPath(left), Path.GetFullPath(right), StringComparison.OrdinalIgnoreCase);
+    private static void Write(bool completed, string? error)
+    {
+        if (config is null) return;
+        var first = runs.ElementAtOrDefault(0); var second = runs.ElementAtOrDefault(1);
+        var evidence = new FirstApplyAutomationEvidence { Phase = config.Phase, Completed = completed, Prepared = prepared, FunctionalEvidenceCompleted = completed, ErrorCode = error, DbmodBefore = dbmodBaseline, DbmodAfterCommand1 = first?.DbmodAfter, DbmodAfterCommand2 = second?.DbmodAfter, Baseline = baseline, AfterCommand1 = first?.After, AfterCommand2 = second?.After, CompletedCommands = runs.Where(x => x.Ended).Select(x => "PXP-OA").ToArray(), PlanIdRun1 = first?.PlanId, PlanIdRun2 = second?.PlanId, PlanIdsEqual = first is not null && second is not null ? string.Equals(first.PlanId, second.PlanId, StringComparison.Ordinal) : null, EligibleCandidateCount = first?.Candidates.Count, SelectedCandidateHash = first?.Candidates.OrderBy(x => x, StringComparer.Ordinal).FirstOrDefault(), ViewHash = first?.View, CreateRun1 = first?.Create, CreateRun2 = second?.Create, SkipRun2 = second?.Skip, CommandsCompleted = runs.Count == 2 && runs.All(x => x.Ended), InspectorsCompleted = baseline is not null && first?.After is not null && second?.After is not null, EvidenceFlushed = true, CurrentState = terminal ? (completed ? "Completed" : "Failed") : "Prepared", StateTransitions = transitions };
+        Directory.CreateDirectory(Path.GetDirectoryName(config.EvidencePath)!);
+        var temp = config.EvidencePath + ".tmp"; File.WriteAllText(temp, JsonSerializer.Serialize(evidence)); File.Move(temp, config.EvidencePath, true);
+    }
+}

Plant3D2026/P_Rec_Annot/tests/PRecAnnot.Core.Tests/FoundationTests.cs

@@ -61,6 +61,170 @@ public sealed class FoundationTests
         Assert.Contains("[CommandMethod(\"PHP_REC_ANNOT\")]", source);
         Assert.Contains("[CommandMethod(\"PXP-AAV\")]", source);
         Assert.Contains("[CommandMethod(\"PXP-OA\")]", source);
+        Assert.Contains("PHP_REC_AUTOMATION_READY", source);
+    }
+
+    [Fact] public void AutomationBootstrap_DefersPlantAndDocumentAccessUntilCoordinator()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        var bootstrap = source[..source.IndexOf("internal sealed record FirstApplyAutomationEvidence", StringComparison.Ordinal)];
+        Assert.DoesNotContain("PlantProject.LoadProject", bootstrap);
+        Assert.DoesNotContain("MdiActiveDocument", bootstrap);
+        Assert.Contains("AcadApplication.Idle += OnIdle", bootstrap);
+        Assert.Contains("observedIdle = true", bootstrap);
+        Assert.Contains("coordinatorStartCount++", bootstrap);
+    }
+
+    [Fact] public void AutomationLifecycleProbe_CompletesBeforePlantActivation()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.Contains("LifecycleProbe", source);
+        Assert.True(source.IndexOf("CompleteLifecycleProbe", StringComparison.Ordinal) < source.IndexOf("PlantProject.LoadProject", StringComparison.Ordinal));
+        Assert.Contains("PostStartupReady", source);
+    }
+
+    [Fact] public void AutomationProjectActivation_WaitsForFixtureDocumentAndQuiescence()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        var activation = source[source.IndexOf("private void TryActivateProjectAndVerifyContext", StringComparison.Ordinal)..];
+        Assert.Contains("!fixtureDocumentActivated", activation);
+        Assert.Contains("!AcadApplication.IsQuiescent", activation);
+        Assert.True(activation.IndexOf("PlantProject.LoadProject", StringComparison.Ordinal) > activation.IndexOf("AutomationBeforeProjectActivation", StringComparison.Ordinal));
+    }
+
+    [Fact] public void AutomationDocumentActivation_IsSubscribedBeforeFixtureOpen()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.True(source.IndexOf("DocumentActivated += OnDocumentActivated", StringComparison.Ordinal) < source.IndexOf("DocumentManager.Open(config.OrthoDrawingPath", StringComparison.Ordinal));
+        Assert.Contains("FixtureDocumentActivated", source);
+    }
+
+    [Fact] public void AutomationDocumentActivation_RecoversSynchronousOpenEvent()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        var start = source[source.IndexOf("public void Start()", StringComparison.Ordinal)..source.IndexOf("private void CompleteLifecycleProbe", StringComparison.Ordinal)];
+        Assert.Contains("FixtureDocumentActiveAfterOpen", start);
+        Assert.Contains("fixtureDocumentActivated = true", start);
+        Assert.Contains("QueueReadinessBarrier();", start);
+        Assert.Contains("ReadinessBarrierCompleted", source);
+        Assert.Contains("TryActivateProjectAndVerifyContext();", source);
+    }
+
+    [Fact] public void QueueReadinessBarrier_RequiresActiveFixtureAndUsesSafeDispatch()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        var dispatcher = source[source.IndexOf("private async Task DispatchCommandAsync", StringComparison.Ordinal)..source.IndexOf("private void OnCommandEnded", StringComparison.Ordinal)];
+        Assert.Contains("ExecuteInCommandContextAsync", dispatcher);
+        Assert.Contains("MdiActiveDocument", dispatcher);
+        Assert.Contains("AUTOMATION_COMMAND_DOCUMENT_NOT_ACTIVE", dispatcher);
+        Assert.Contains("Editor.CommandAsync", dispatcher);
+        Assert.DoesNotContain("SendStringToExecute", dispatcher);
+    }
+
+    [Fact] public void AutomationControlledExit_QueuesNativeQuitAfterPublicCommand()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.Contains("RequestControlledExit", source);
+        Assert.Contains("AcadApplication.Idle += OnExitIdle", source);
+        Assert.Contains("QuitDispatchAttempted", source);
+        Assert.Contains("exitDocument.SendStringToExecute(\"_.QUIT _N\\n\", true, true, false);", source);
+        Assert.Contains("var exitDocument = AcadApplication.DocumentManager.MdiActiveDocument;", source);
+    }
+
+    [Fact] public void Callback_AfterDocumentDestroyed_DoesNotAccessDocument()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.Contains("if (document is null || e.Document is null) return;", source);
+        Assert.Contains("if (IsTerminal || document is null) return;", source);
+    }
+
+    [Fact] public void Idle_WhenActiveDocumentNull_DoesNotThrow()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.Contains("AUTOMATION_EXIT_DOCUMENT_UNAVAILABLE", source);
+        Assert.Contains("QuitDispatchSkippedNoLiveDocument", source);
+    }
+
+    [Fact] public void TerminalState_IgnoresFurtherCallbacks()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.Contains("private bool IsTerminal", source);
+        Assert.Contains("if (IsTerminal && callback != \"ControlledExitIdle\") return;", source);
+    }
+
+    [Fact] public void HandlerException_ProducesFailedEvidence()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.Contains("exceptionText = exception.ToString();", source);
+        Assert.Contains("ExceptionText = exceptionText", source);
+        Assert.Contains("FailFromCallback", source);
+    }
+
+    [Fact] public void HandlerException_DoesNotEscapeToAutoCad()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.Contains("private void RunCallback", source);
+        Assert.Contains("catch (System.Exception exception) { FailFromCallback", source);
+        Assert.Contains("=> RunCallback(\"Idle\"", source);
+        Assert.Contains("=> RunCallback(\"CommandFailed\"", source);
+    }
+
+    [Fact] public void Unsubscribe_IsIdempotent()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.Contains("private bool documentHandlersSubscribed", source);
+        Assert.Contains("private bool lifecycleHandlersSubscribed", source);
+        Assert.Contains("private void UnsubscribeHandlers()", source);
+    }
+
+    [Fact] public void ControlledExit_DoesNotReuseDestroyedDocument()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        var controlledExit = source[source.IndexOf("private void RequestControlledExit", StringComparison.Ordinal)..];
+        Assert.DoesNotContain("document.CloseAndDiscard", controlledExit);
+        Assert.Contains("var exitDocument = AcadApplication.DocumentManager.MdiActiveDocument;", controlledExit);
+        Assert.Contains("document = null;", controlledExit);
+    }
+
+    [Fact] public void FinalCommandCompletion_UsesItsQuiescentExitBoundary()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.Contains("Complete(true, null, safeToExitNow: true)", source);
+        Assert.Contains("RequestControlledExit(safeToExitNow);", source);
+    }
+
+    [Fact] public void TerminalEvidence_IsFlushedBeforeExitAttempt()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        var exit = source[source.IndexOf("private void DispatchNativeQuit", StringComparison.Ordinal)..];
+        Assert.True(exit.IndexOf("TryWriteEvidence(functionalCompleted, null);", StringComparison.Ordinal) < exit.IndexOf("SendStringToExecute(\"_.QUIT _N\\n", StringComparison.Ordinal));
+        Assert.Contains("EvidenceFlushed = evidenceFlushed", source);
+        Assert.Contains("CommandsCompleted", source);
+        Assert.Contains("InspectorsCompleted", source);
+    }
+
+    [Fact] public void ExitFailure_DoesNotInvalidateCompletedFunctionalEvidence()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.Contains("if (functionalCompleted)", source);
+        Assert.Contains("ExitFailureCode = exitFailureCode", source);
+        Assert.Contains("TryWriteEvidence(functionalCompleted, null);", source);
+    }
+
+    [Fact] public void ExitDispatch_DoesNotUseUnavailableDocument()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        var exit = source[source.IndexOf("private void DispatchNativeQuit", StringComparison.Ordinal)..];
+        Assert.Contains("AcadApplication.IsQuiescent", exit);
+        Assert.Contains("QuitDispatchSkippedNoLiveDocument", exit);
+        Assert.DoesNotContain("document ?? AcadApplication.DocumentManager", exit);
+    }
+
+    [Fact] public void ProductionRuntime_DoesNotEnableForceAfterEvidence()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
+        Assert.DoesNotContain("ForceAfterEvidence", source);
+        Assert.Contains("P_REC_ANNOT_AUTOMATION", source);
     }
 
     [Fact] public void PrimaryCommand_IsRegistered() => Assert.Contains("[CommandMethod(\"PHP_REC_ANNOT\")]", File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "EntryPoint.cs")));
@@ -104,6 +268,62 @@ public sealed class FoundationTests
         Assert.Equal(first.Operations.Select(x => x.SourceSnapshotId), second.Operations.Select(x => x.SourceSnapshotId));
     }
 
+    [Fact] public void AnnotationPlan_ReversedObjectOrder_HasSamePlanId()
+    {
+        var first = Build(Snapshot("a", "Pipe", "L-1"), Snapshot("b", "Pipe", "L-2"));
+        var second = Build(Snapshot("b", "Pipe", "L-2"), Snapshot("a", "Pipe", "L-1"));
+        Assert.Equal(first.PlanId, second.PlanId);
+        Assert.Equal(first.Summary, second.Summary);
+    }
+
+    [Fact] public void AnnotationPlan_AbsolutePath_DoesNotAffectPlanId()
+    {
+        var builder = new AnnotationPlanBuilder();
+        var item = Snapshot("a", "Pipe", "L-1");
+        var first = builder.Build(new AnnotationPlanningRequest { CommandName = "PHP_REC_ANNOT", Viewport = new OrthoViewportInfo { Id = "v", DisplayName = "v", SourceDrawingName = "C:\\one\\model.dwg" }, Objects = new[] { item } });
+        var second = builder.Build(new AnnotationPlanningRequest { CommandName = "PHP_REC_ANNOT", Viewport = new OrthoViewportInfo { Id = "v", DisplayName = "v", SourceDrawingName = "D:\\two\\model.dwg" }, Objects = new[] { item } });
+        Assert.Equal(first.PlanId, second.PlanId);
+    }
+
+    [Fact] public void AnnotationPlan_ChangedRelevantProperty_ChangesPlanId()
+    {
+        var first = Build(Snapshot("a", "Pipe", "L-1"));
+        var second = Build(Snapshot("a", "Pipe", "L-2"));
+        Assert.NotEqual(first.PlanId, second.PlanId);
+    }
+
+    [Fact] public void AnnotationPlan_UnresolvedMembership_IsStableSkip()
+    {
+        var plan = Build(new PlantObjectSnapshot { SnapshotId = "a", ObjectClass = "Pipe", LineNumber = "L-1", Geometry = new GeometrySnapshot(), MembershipStatus = ViewMembershipStatus.NotResolved });
+        Assert.Equal(AnnotationOperationKind.Skip, Assert.Single(plan.Operations).Kind);
+        Assert.Contains("VIEW_MEMBERSHIP_NOT_RESOLVED", plan.SkipReasons);
+    }
+
+    [Fact] public void ViewportMembership_OutsideClip_IsSkippedWithStableReason()
+    {
+        var plan = Build(new PlantObjectSnapshot { SnapshotId = "a", ObjectClass = "Pipe", LineNumber = "L-1", Geometry = new GeometrySnapshot(), MembershipStatus = ViewMembershipStatus.ObjectOutsideView });
+        Assert.Equal(AnnotationOperationKind.Skip, Assert.Single(plan.Operations).Kind);
+        Assert.Contains("VIEW_MEMBERSHIP_OBJECT_OUTSIDE_CLIP", plan.SkipReasons);
+    }
+
+    [Fact] public void AnnotationPlan_ResolvedMembership_AffectsPlanId()
+    {
+        var resolved = Build(new PlantObjectSnapshot { SnapshotId = "a", ObjectClass = "Pipe", LineNumber = "L-1", Geometry = new GeometrySnapshot(), MembershipStatus = ViewMembershipStatus.Resolved });
+        var outside = Build(new PlantObjectSnapshot { SnapshotId = "a", ObjectClass = "Pipe", LineNumber = "L-1", Geometry = new GeometrySnapshot(), MembershipStatus = ViewMembershipStatus.ObjectOutsideView });
+        Assert.NotEqual(resolved.PlanId, outside.PlanId);
+    }
+
+    [Fact] public void AnnotationPlan_ReorderedMembership_HasSamePlanId()
+    {
+        var first = Build(
+            new PlantObjectSnapshot { SnapshotId = "a", ObjectClass = "Pipe", LineNumber = "L-1", Geometry = new GeometrySnapshot(), MembershipStatus = ViewMembershipStatus.Resolved },
+            new PlantObjectSnapshot { SnapshotId = "b", ObjectClass = "Pipe", LineNumber = "L-2", Geometry = new GeometrySnapshot(), MembershipStatus = ViewMembershipStatus.ObjectOutsideView });
+        var second = Build(
+            new PlantObjectSnapshot { SnapshotId = "b", ObjectClass = "Pipe", LineNumber = "L-2", Geometry = new GeometrySnapshot(), MembershipStatus = ViewMembershipStatus.ObjectOutsideView },
+            new PlantObjectSnapshot { SnapshotId = "a", ObjectClass = "Pipe", LineNumber = "L-1", Geometry = new GeometrySnapshot(), MembershipStatus = ViewMembershipStatus.Resolved });
+        Assert.Equal(first.PlanId, second.PlanId);
+    }
+
     [Fact] public void AnnotationPlan_MissingLineNumber_IsSkipped()
     {
         var plan = Build(Snapshot("a", "Pipe", null, null));
@@ -164,8 +384,131 @@ public sealed class FoundationTests
         Assert.Contains("ORTHO_SOURCE_DRAWING_NOT_RESOLVED", source.EvidenceCodes);
     }
 
+    [Fact] public void DwgQueryContract_UsesConfirmedModelFileContract()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "PlantReadPath.cs"));
+        Assert.Contains("view.DwgQuery?.ModelFiles", source);
+        Assert.Contains("file.ModelFileName", source);
+        Assert.Contains("ORTHO_MODEL_FILES_API_UNSUPPORTED", source);
+    }
+
+    [Fact] public void DwgQueryContract_DoesNotGuessAlternativePropertyNames()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "PlantReadPath.cs"));
+        Assert.DoesNotContain("GetProperty(\"ModelFileName\")", source);
+        Assert.DoesNotContain("GetProperty(\"Value\")", source);
+        Assert.DoesNotContain("GetProperty(\"FileName\")", source);
+    }
+
+    [Fact] public void OrthoSourceReader_UsesResolvedPipingProjectDrawingId()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "PlantReadPath.cs"));
+        Assert.Contains("pipingProject.GetPnPDrawingFiles()", source);
+        Assert.Contains("dataLinks.SelectAcPpRowIds(sourceDrawing.Id)", source);
+    }
+
+    [Fact] public void OrthoSourceReader_DoesNotQueryTheActiveOrthoDatabase()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "PlantReadPath.cs"));
+        Assert.DoesNotContain("SelectAcPpRowIds(sourceDatabase)", source);
+        Assert.DoesNotContain("ReadDwgFile(viewport.SourceDrawingName", source);
+    }
+
+    [Fact] public void OrthoSourceReader_ReportsDistinctSourceDiagnostics()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "PlantReadPath.cs"));
+        Assert.Contains("ORTHO_SOURCE_DRAWING_NOT_IN_PROJECT", source);
+        Assert.Contains("SOURCE_DATALINKS_UNAVAILABLE", source);
+        Assert.Contains("SOURCE_DATALINKS_NO_ROWS", source);
+    }
+
+    [Fact] public void ViewportMembership_UsesConfirmedPnpIdentityContract()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "PlantReadPath.cs"));
+        Assert.Contains("view.DwgQuery.Execute", source);
+        Assert.Contains("sourceId.PrjObjectId", source);
+        Assert.Contains("dataLinks.FindAcPpRowId", source);
+        Assert.Contains("VIEW_MEMBERSHIP_FROM_CONFIRMED_PNP_ID", source);
+    }
+
+    [Fact] public void ViewportMembership_DoesNotSelectFirstViewport()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "PlantReadPath.cs"));
+        Assert.DoesNotContain("DwgViewDefs.AsArray().First", source);
+        Assert.Contains("candidates.Length != 1", source);
+    }
+
+    [Fact] public void RuntimeInspector_IsDisabledByDefault()
+    {
+        var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "RuntimeDiagnostics.cs"));
+        Assert.Contains("P_REC_ANNOT_DIAGNOSTICS", source);
+        Assert.Contains("OrthoStructure", source);
+    }
+
     [Fact] public void ApplyMode_IsBlocked() => Assert.Throws<InvalidOperationException>(() => new ExecutionModeWriteGuard(PRecAnnotExecutionMode.Apply).EnsureWriteAllowed("test"));
 
+    [Fact] public void FirstLimitedApply_RequiresApplyMode()
+    {
+        var context = FirstApplyContext();
+        Assert.Throws<InvalidOperationException>(() => new FirstLimitedApplyPlanner().Prepare(PRecAnnotExecutionMode.DryRun, context.Plan, context.Viewport, context.Objects, context.Permit));
+    }
+
+    [Fact] public void FirstLimitedApply_RequiresFreshPlan()
+    {
+        var context = FirstApplyContext();
+        var permit = context.Permit with { ExpectedPlanId = "stale" };
+        Assert.Throws<InvalidOperationException>(() => new FirstLimitedApplyPlanner().Prepare(PRecAnnotExecutionMode.Apply, context.Plan, context.Viewport, context.Objects, permit));
+    }
+
+    [Fact] public void FirstLimitedApply_RequiresResolvedMembership()
+    {
+        var context = FirstApplyContext();
+        var objects = new[] { context.Objects[0] with { MembershipStatus = ViewMembershipStatus.NotResolved } };
+        Assert.Throws<InvalidOperationException>(() => new FirstLimitedApplyPlanner().Prepare(PRecAnnotExecutionMode.Apply, context.Plan, context.Viewport, objects, context.Permit));
+    }
+
+    [Fact] public void FirstLimitedApply_RequiresExactlyOneTarget()
+    {
+        var context = FirstApplyContext();
+        var permit = context.Permit with { TargetSnapshotId = "missing" };
+        Assert.Throws<InvalidOperationException>(() => new FirstLimitedApplyPlanner().Prepare(PRecAnnotExecutionMode.Apply, context.Plan, context.Viewport, context.Objects, permit));
+    }
+
+    [Fact] public void FirstLimitedApply_CreatesDeterministicOperation()
+    {
+        var context = FirstApplyContext();
+        var planner = new FirstLimitedApplyPlanner();
+        var first = planner.Prepare(PRecAnnotExecutionMode.Apply, context.Plan, context.Viewport, context.Objects, context.Permit);
+        var second = planner.Prepare(PRecAnnotExecutionMode.Apply, context.Plan, context.Viewport, context.Objects, context.Permit);
+        Assert.Equal(first.Operation.OperationId, second.Operation.OperationId);
+        Assert.Equal(first.Operation.DuplicateKey, second.Operation.DuplicateKey);
+        Assert.DoesNotContain("C:\\", first.Operation.DuplicateKey, StringComparison.OrdinalIgnoreCase);
+    }
+
+    [Fact] public void FirstLimitedApplyPlan_OneResolvedPipeCreatesOnePipeOperation()
+    {
+        var viewport = new OrthoViewportInfo { Id = "vp", DisplayName = "view", SourceDrawingName = "model.dwg" };
+        var plan = new AnnotationPlanBuilder().Build(new AnnotationPlanningRequest
+        {
+            CommandName = "PXP-OA", Viewport = viewport,
+            Objects = new[] { Snapshot("pipe", "Pipe", null), Snapshot("other", "Valve", "TEST") },
+            LimitedApplyTargetSnapshotId = "pipe", LimitedApplyRuleId = FirstLimitedApplyPlanner.RuleId
+        });
+        Assert.Equal(1, plan.Summary.CreateCount);
+        Assert.Equal("PIPE", Assert.Single(plan.Operations.Where(x => x.Kind == AnnotationOperationKind.Create)).AnnotationType);
+        Assert.Contains("APPLY_NOT_SELECTED_TARGET", plan.Operations.Single(x => x.SourceSnapshotId == "other").Reasons);
+    }
+
+    [Fact] public void FirstLimitedApplyPlan_SelectionChangesCanonicalPlanId()
+    {
+        var viewport = new OrthoViewportInfo { Id = "vp", DisplayName = "view", SourceDrawingName = "model.dwg" };
+        var objects = new[] { Snapshot("one", "Pipe", null), Snapshot("two", "Pipe", null) };
+        var builder = new AnnotationPlanBuilder();
+        var one = builder.Build(new AnnotationPlanningRequest { CommandName = "PXP-OA", Viewport = viewport, Objects = objects, LimitedApplyTargetSnapshotId = "one", LimitedApplyRuleId = FirstLimitedApplyPlanner.RuleId });
+        var two = builder.Build(new AnnotationPlanningRequest { CommandName = "PXP-OA", Viewport = viewport, Objects = objects, LimitedApplyTargetSnapshotId = "two", LimitedApplyRuleId = FirstLimitedApplyPlanner.RuleId });
+        Assert.NotEqual(one.PlanId, two.PlanId);
+    }
+
     [Fact] public void DryRunPath_HasNoForWriteOperations()
     {
         var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "PlantReadPath.cs"));
@@ -175,6 +518,21 @@ public sealed class FoundationTests
         Assert.DoesNotContain("SetProperties", source);
     }
 
+    private static (AnnotationPlan Plan, OrthoViewportInfo Viewport, PlantObjectSnapshot[] Objects, FirstLimitedApplyPermit Permit) FirstApplyContext()
+    {
+        var viewport = new OrthoViewportInfo { Id = "vp", DisplayName = "view", SourceDrawingName = "model.dwg" };
+        var objects = new[] { Snapshot("pipe", "Pipe", "TEST") };
+        var plan = new AnnotationPlanBuilder().Build(new AnnotationPlanningRequest
+        {
+            CommandName = "PXP-OA",
+            Viewport = viewport,
+            Objects = objects,
+            LimitedApplyTargetSnapshotId = "pipe",
+            LimitedApplyRuleId = FirstLimitedApplyPlanner.RuleId
+        });
+        return (plan, viewport, objects, new FirstLimitedApplyPermit { FixtureMarker = FirstLimitedApplyPlanner.FixtureMarker, AllowApply = true, TargetSnapshotId = "pipe", ExpectedPlanId = plan.PlanId });
+    }
+
     private static AnnotationPlan Build(params PlantObjectSnapshot[] objects) => new AnnotationPlanBuilder().Build(new AnnotationPlanningRequest { CommandName = "PHP_REC_ANNOT", Viewport = new OrthoViewportInfo { Id = "vp", DisplayName = "A", SourceDrawingName = "test.dwg" }, Objects = objects });
-    private static PlantObjectSnapshot Snapshot(string id, string type, string? line, string? tag = "TAG") => new() { SnapshotId = id, ObjectClass = type, LineNumber = line, Tag = tag, Geometry = new GeometrySnapshot { PaperPosition = new Point2Dto(1, 2) } };
+    private static PlantObjectSnapshot Snapshot(string id, string type, string? line, string? tag = "TAG") => new() { SnapshotId = id, ObjectClass = type, LineNumber = line, Tag = tag, Geometry = new GeometrySnapshot { PaperPosition = new Point2Dto(1, 2) }, MembershipStatus = ViewMembershipStatus.Resolved };
 }