fix: make artifact projection durable

src/main/agent-runtime/agent-hooks.ts

@@ -78,8 +78,8 @@ export interface AgentHookBundle {
  *  - `beforeToolCall`: fail-closed RPC. A thrown error travels up into
  *    pi's loop and surfaces as a tool-error result — destructive tools
  *    must never silently bypass main's approval gate.
- *  - `afterToolCall`: fail-open RPC. Projection is observational; if
- *    main cannot be reached the tool result stands unchanged.
+ *  - `afterToolCall`: fail-closed RPC. The tool has already run, so
+ *    main must durably acknowledge the artifact projection result.
  *  - `transformContext`: worker-local compaction. The transcript stays
  *    inside the worker; main receives telemetry only.
  */
@@ -120,10 +120,7 @@ export function buildAgentHooks(deps: AgentHooksDeps): AgentHookBundle {
     };
     const response = await rpc.invoke(runId, "afterToolCall", payload);
     if (!response.ok) {
-      // After-hook failure is informational: the tool already ran,
-      // projection is a best-effort write. Drop the hook rather than
-      // corrupting the tool result.
-      return undefined;
+      throw new Error(`afterToolCall RPC failed: ${response.error}`);
     }
     const result = response.result as AfterToolCallRpcResult;
     const override: AfterToolCallResult = {};

src/main/agent-runtime/artifact-projection-events.ts

@@ -0,0 +1,105 @@
+import type { AppDatabase } from "@main/database";
+import type { ProjectionOutcome } from "./artifact-types";
+
+export type ArtifactProjectionPhase = "after_tool_call" | "completion_reconcile";
+
+export interface ArtifactProjectionEventInput {
+  companyId: string;
+  runId: string;
+  agentId: string;
+  phase: ArtifactProjectionPhase;
+  workspaceId: string | null;
+  workspaceMode: "exclusive" | "shared" | "none";
+  toolName?: string | null;
+  toolCallId?: string | null;
+  outcomes: ProjectionOutcome[];
+}
+
+export interface ArtifactProjectionFailureInput {
+  companyId: string;
+  runId: string;
+  agentId: string;
+  phase: ArtifactProjectionPhase;
+  workspaceId: string | null;
+  workspaceMode: "exclusive" | "shared" | "none";
+  toolName?: string | null;
+  toolCallId?: string | null;
+  errorMessage: string;
+}
+
+interface ProjectionCounts {
+  inserted: number;
+  updated: number;
+  retired: number;
+  skipped: number;
+}
+
+function countOutcomes(outcomes: ProjectionOutcome[]): ProjectionCounts {
+  const counts: ProjectionCounts = {
+    inserted: 0,
+    updated: 0,
+    retired: 0,
+    skipped: 0,
+  };
+  for (const outcome of outcomes) {
+    counts[outcome.kind] += 1;
+  }
+  return counts;
+}
+
+function summarizeOutcomes(phase: ArtifactProjectionPhase, counts: ProjectionCounts): string {
+  return [
+    `Artifact projection ${phase} acknowledged`,
+    `${counts.inserted} inserted`,
+    `${counts.updated} updated`,
+    `${counts.retired} retired`,
+    `${counts.skipped} skipped`,
+  ].join("; ");
+}
+
+export function appendArtifactProjectionEvent(
+  db: AppDatabase,
+  input: ArtifactProjectionEventInput,
+): ProjectionCounts {
+  const counts = countOutcomes(input.outcomes);
+  db.core.runs.appendRunEvent({
+    companyId: input.companyId,
+    runId: input.runId,
+    agentId: input.agentId,
+    eventType: "artifact_projection",
+    level: "info",
+    message: summarizeOutcomes(input.phase, counts),
+    payload: {
+      phase: input.phase,
+      workspaceId: input.workspaceId,
+      workspaceMode: input.workspaceMode,
+      toolName: input.toolName ?? null,
+      toolCallId: input.toolCallId ?? null,
+      counts,
+      outcomes: input.outcomes,
+    },
+  });
+  return counts;
+}
+
+export function appendArtifactProjectionFailureEvent(
+  db: AppDatabase,
+  input: ArtifactProjectionFailureInput,
+): void {
+  db.core.runs.appendRunEvent({
+    companyId: input.companyId,
+    runId: input.runId,
+    agentId: input.agentId,
+    eventType: "artifact_projection",
+    level: "error",
+    message: `Artifact projection ${input.phase} failed: ${input.errorMessage}`,
+    payload: {
+      phase: input.phase,
+      workspaceId: input.workspaceId,
+      workspaceMode: input.workspaceMode,
+      toolName: input.toolName ?? null,
+      toolCallId: input.toolCallId ?? null,
+      errorMessage: input.errorMessage,
+    },
+  });
+}

src/main/agent-runtime/artifact-projector.ts

@@ -81,9 +81,6 @@ export function reconcileWorkspaceArtifacts(
   db: AppDatabase,
   ctx: ArtifactProjectorRunContext,
 ): ProjectionOutcome[] {
-  if (ctx.workspaceMode !== "exclusive") {
-    return [{ kind: "skipped", reason: "workspace_not_exclusive" }];
-  }
   return projectCollectedChanges(db, ctx, collectChangedPaths(ctx));
 }
 
@@ -91,9 +88,6 @@ function projectBashArtifacts(
   db: AppDatabase,
   ctx: ArtifactProjectorRunContext,
 ): ProjectionOutcome[] {
-  if (ctx.workspaceMode !== "exclusive") {
-    return [{ kind: "skipped", reason: "workspace_not_exclusive" }];
-  }
   return projectCollectedChanges(db, ctx, collectChangedPaths(ctx));
 }
 

src/main/agent-runtime/artifact-work-products.ts

@@ -51,9 +51,14 @@ export function retireDeletedArtifacts(
   deleted: string[],
 ): ProjectionOutcome[] {
   if (deleted.length === 0) return [];
+  const resolvedWorkspaceId =
+    ctx.workspaceId ??
+    (ctx.workspacePath
+      ? db.core.workspaces.findWorkspaceIdByLocalPath(ctx.companyId, ctx.workspacePath)
+      : null);
   const archived = db.core.documents.archiveWorkProductsByExternalPaths({
     companyId: ctx.companyId,
-    workspaceId: ctx.workspaceId,
+    workspaceId: resolvedWorkspaceId,
     provider: "filesystem",
     paths: deleted,
     lastTouchedByRunId: ctx.runId,

src/main/agent-runtime/hook-handlers.ts

@@ -23,6 +23,10 @@ import {
   projectToolExecutionToWorkProduct,
   type ArtifactProjectorRunContext,
 } from "./artifact-projector";
+import {
+  appendArtifactProjectionEvent,
+  appendArtifactProjectionFailureEvent,
+} from "./artifact-projection-events";
 import {
   isCofounderMandatoryApproval,
   isOperationalApproval,
@@ -144,12 +148,10 @@ function checkOperationalApprovalBlock(
  * through this hook; as further projections (browser actions, social
  * posts) migrate off the event-observer path they plug in here.
  *
- * Projection is treated as a primary persistence action: failures are
- * logged at ERROR so they stay visible in the desktop log tail, and the
- * `run-finished` reconciliation sweep (`RuntimeBridge`) revisits the
- * workspace to register anything the hook missed. Silent swallow was
- * the failure mode that left `work_products` empty while the workspace
- * accumulated files the UI never surfaced.
+ * Projection is treated as a primary persistence action: the filesystem
+ * mutation and its run-event acknowledgement commit together. A failure
+ * returns an RPC error to the worker, which lets pi surface the hook
+ * failure as a deterministic tool error.
  */
 export function handleAfterToolCall(
   deps: HookHandlerDeps,
@@ -168,16 +170,30 @@ export function handleAfterToolCall(
     workspaceBaseline: ctx.workspaceBaseline,
   };
   try {
-    const outcomes = projectToolExecutionToWorkProduct(
-      deps.db,
-      runCtx,
-      {
+    const outcomes = deps.db.withTransaction(() => {
+      const projectionOutcomes = projectToolExecutionToWorkProduct(
+        deps.db,
+        runCtx,
+        {
+          toolName: payload.toolName,
+          args: payload.args,
+          result: payload.resultContent,
+          isError: payload.isError,
+        },
+      );
+      appendArtifactProjectionEvent(deps.db, {
+        companyId: ctx.companyId,
+        runId: ctx.runId,
+        agentId: ctx.agentId,
+        phase: "after_tool_call",
+        workspaceId: ctx.workspaceId,
+        workspaceMode: ctx.workspaceMode,
         toolName: payload.toolName,
-        args: payload.args,
-        result: payload.resultContent,
-        isError: payload.isError,
-      },
-    );
+        toolCallId: payload.toolCallId,
+        outcomes: projectionOutcomes,
+      });
+      return projectionOutcomes;
+    });
     const registered = outcomes.filter((o) => o.kind === "inserted" || o.kind === "updated").length;
     const retired = outcomes.filter((o) => o.kind === "retired").length;
     if (registered > 0 || retired > 0) {
@@ -186,9 +202,28 @@ export function handleAfterToolCall(
       );
     }
   } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : String(error);
+    try {
+      appendArtifactProjectionFailureEvent(deps.db, {
+        companyId: ctx.companyId,
+        runId: ctx.runId,
+        agentId: ctx.agentId,
+        phase: "after_tool_call",
+        workspaceId: ctx.workspaceId,
+        workspaceMode: ctx.workspaceMode,
+        toolName: payload.toolName,
+        toolCallId: payload.toolCallId,
+        errorMessage,
+      });
+    } catch (ackError) {
+      deps.logger.error(
+        `[hook-handlers] artifact projection failure ack failed for run ${ctx.runId} tool ${payload.toolName}: ${ackError instanceof Error ? ackError.message : String(ackError)}`,
+      );
+    }
     deps.logger.error(
-      `[hook-handlers] artifact projection threw for run ${ctx.runId} tool ${payload.toolName}: ${error instanceof Error ? error.message : String(error)}`,
+      `[hook-handlers] artifact projection threw for run ${ctx.runId} tool ${payload.toolName}: ${errorMessage}`,
     );
+    throw error;
   }
   return NO_OP_AFTER;
 }

src/main/agent-runtime/runtime-artifact-reconciler.ts

@@ -0,0 +1,79 @@
+import type { AppDatabase } from "@main/database";
+import type { ActiveRunContext } from "./hook-handlers";
+import { reconcileWorkspaceArtifacts } from "./artifact-projector";
+import {
+  appendArtifactProjectionEvent,
+  appendArtifactProjectionFailureEvent,
+} from "./artifact-projection-events";
+
+export type RunResourceReleaseResult =
+  | { ok: true }
+  | { ok: false; errorMessage: string };
+
+export interface RuntimeArtifactReconcilerDeps {
+  db: AppDatabase;
+  logger: {
+    info: (...args: unknown[]) => void;
+    error: (...args: unknown[]) => void;
+  };
+}
+
+export function reconcileArtifactsForActiveRun(
+  deps: RuntimeArtifactReconcilerDeps,
+  ctx: ActiveRunContext,
+): RunResourceReleaseResult {
+  try {
+    const outcomes = deps.db.withTransaction(() => {
+      const projectionOutcomes = reconcileWorkspaceArtifacts(deps.db, {
+        runId: ctx.runId,
+        agentId: ctx.agentId,
+        companyId: ctx.companyId,
+        taskId: ctx.taskId,
+        workspaceId: ctx.workspaceId,
+        workspacePath: ctx.workspacePath,
+        workspaceMode: ctx.workspaceMode,
+        logger: deps.logger,
+        workspaceBaseline: ctx.workspaceBaseline,
+      });
+      appendArtifactProjectionEvent(deps.db, {
+        companyId: ctx.companyId,
+        runId: ctx.runId,
+        agentId: ctx.agentId,
+        phase: "completion_reconcile",
+        workspaceId: ctx.workspaceId,
+        workspaceMode: ctx.workspaceMode,
+        outcomes: projectionOutcomes,
+      });
+      return projectionOutcomes;
+    });
+    const inserted = outcomes.filter((o) => o.kind === "inserted").length;
+    const retired = outcomes.filter((o) => o.kind === "retired").length;
+    if (inserted > 0 || retired > 0) {
+      deps.logger.info(
+        `[runtime-bridge] reconciliation for run ${ctx.runId}: ${inserted} registered, ${retired} retired`,
+      );
+    }
+    return { ok: true };
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : String(error);
+    try {
+      appendArtifactProjectionFailureEvent(deps.db, {
+        companyId: ctx.companyId,
+        runId: ctx.runId,
+        agentId: ctx.agentId,
+        phase: "completion_reconcile",
+        workspaceId: ctx.workspaceId,
+        workspaceMode: ctx.workspaceMode,
+        errorMessage,
+      });
+    } catch (ackError) {
+      deps.logger.error(
+        `[runtime-bridge] artifact reconciliation failure ack failed for run ${ctx.runId}: ${ackError instanceof Error ? ackError.message : String(ackError)}`,
+      );
+    }
+    deps.logger.error(
+      `[runtime-bridge] artifact reconciliation failed for run ${ctx.runId}: ${errorMessage}`,
+    );
+    return { ok: false, errorMessage };
+  }
+}

src/main/agent-runtime/runtime-bridge.ts

@@ -8,7 +8,11 @@ import { getConnectorDefinition } from "@main/connectors";
 import { projectInboxMessageToPi } from "./inbox-projection";
 import { projectAgentEventToLogChunk } from "./agent-event-projection";
 import { hasAttributableAssistantUsage } from "../run-usage-status";
-import { captureBaselineIfRequired, reconcileWorkspaceArtifacts } from "./artifact-projector";
+import { captureBaselineIfRequired } from "./artifact-projector";
+import {
+  reconcileArtifactsForActiveRun,
+  type RunResourceReleaseResult,
+} from "./runtime-artifact-reconciler";
 import {
   handleBeforeToolCall,
   handleAfterToolCall,
@@ -134,40 +138,21 @@ export class RuntimeBridge {
    * when individual projections skipped (bash against a non-git repo,
    * path-ignore false positives, transient `git status` failures).
    */
-  releaseRunResources(runId: string): void {
+  releaseRunResources(runId: string): RunResourceReleaseResult {
     const ctx = this.activeRuns.get(runId);
-    if (ctx) this.reconcileArtifactsForRun(ctx);
-    this.activeRuns.delete(runId);
-    this.inboundCorrelations.deleteRun(runId);
-    if (ctx) this.sessionStores.delete(ctx.taskSessionId);
+    let result: RunResourceReleaseResult = { ok: true };
+    try {
+      if (ctx) result = this.reconcileArtifactsForRun(ctx);
+      return result;
+    } finally {
+      this.activeRuns.delete(runId);
+      this.inboundCorrelations.deleteRun(runId);
+      if (ctx) this.sessionStores.delete(ctx.taskSessionId);
+    }
   }
 
-  private reconcileArtifactsForRun(ctx: ActiveRunContext): void {
-    if (!ctx.workspacePath) return;
-    try {
-      const outcomes = reconcileWorkspaceArtifacts(this.deps.db, {
-        runId: ctx.runId,
-        agentId: ctx.agentId,
-        companyId: ctx.companyId,
-        taskId: ctx.taskId,
-        workspaceId: ctx.workspaceId,
-        workspacePath: ctx.workspacePath,
-        workspaceMode: ctx.workspaceMode,
-        logger: this.deps.logger,
-        workspaceBaseline: ctx.workspaceBaseline,
-      });
-      const inserted = outcomes.filter((o) => o.kind === "inserted").length;
-      const retired = outcomes.filter((o) => o.kind === "retired").length;
-      if (inserted > 0 || retired > 0) {
-        this.deps.logger.info(
-          `[runtime-bridge] reconciliation for run ${ctx.runId}: ${inserted} registered, ${retired} retired`,
-        );
-      }
-    } catch (error) {
-      this.deps.logger.error(
-        `[runtime-bridge] artifact reconciliation failed for run ${ctx.runId}: ${error instanceof Error ? error.message : String(error)}`,
-      );
-    }
+  private reconcileArtifactsForRun(ctx: ActiveRunContext): RunResourceReleaseResult {
+    return reconcileArtifactsForActiveRun(this.deps, ctx);
   }
 
   /**
@@ -397,11 +382,7 @@ export class RuntimeBridge {
       workspacePath: string | null;
       workspaceMode: "exclusive" | "shared" | "none";
     };
-    // Baseline scans are safe only while this run owns the workspace lock.
-    const baseline =
-      payload.workspaceMode === "exclusive"
-        ? captureBaselineIfRequired(payload.workspacePath, this.deps.logger)
-        : null;
+    const baseline = captureBaselineIfRequired(payload.workspacePath, this.deps.logger);
     this.registerActiveRun({
       runId,
       agentId: payload.agentId,