refactor(evidence): extract TypeScript lifecycle (#32)

backend/src/workspaces/evidence/materialization.ts

@@ -9,7 +9,7 @@ import {
   writeFileSync,
 } from "node:fs";
 import { dirname, isAbsolute, join } from "node:path";
-import { GitWorkspaceRepository } from "./git-repository.js";
+import type { GitWorkspaceRepository } from "../git-repository.js";
 
 export interface EvidenceMaterializationLimits {
   maxEntries: number;
@@ -81,7 +81,10 @@ function writeExclusiveNoFollow(path: string, contents: Buffer, mode: number): v
 }
 
 export interface MaterializeEvidenceTreeOptions {
-  repository: GitWorkspaceRepository;
+  repository: Pick<
+    GitWorkspaceRepository,
+    "evidenceTreeObjects" | "evidenceTreeId" | "gitObjectSize" | "evidenceBlobBytes"
+  >;
   revision: string;
   id: string;
   /** The workspace directory (e.g. `<staging>/<id>`) that will receive `evidence/` and the manifest. */

backend/src/workspaces/evidence/preprocessing.ts

@@ -0,0 +1,177 @@
+import { isIP } from "node:net";
+import type { WorkspaceDescriptor } from "../schema.js";
+
+type EvidenceConfig = WorkspaceDescriptor["evidence"];
+type SemanticFailureCode = "workspace_not_activatable" | "semantic_index_incompatible";
+
+export interface EvidenceJobState {
+  runId: string;
+  completedStages: string[];
+  childRuns: Record<string, string>;
+}
+
+export interface EvidencePreprocessingDependencies {
+  runStage(argv: string[]): Promise<Record<string, unknown>>;
+  persistJob(): void;
+  semanticPreflight(): Promise<{ ok: true } | { ok: false; code: SemanticFailureCode }>;
+  requireRunId(value: unknown): string;
+  numberRecord(value: unknown): Record<string, number> | undefined;
+}
+
+export interface EvidencePreprocessingRequest {
+  evidence: EvidenceConfig;
+  job: EvidenceJobState;
+  dryRun?: boolean;
+  httpPrivateHostAllowlist?: readonly string[];
+}
+
+export interface EvidencePreprocessingOutcome {
+  status: "succeeded" | "unchanged" | "dry_run" | "failed";
+  code: "ok" | "egress_policy_refused" | SemanticFailureCode;
+  runId?: string;
+  childRuns?: Record<string, string>;
+  completedStages?: string[];
+  counts?: Record<string, number>;
+  warnings?: string[];
+}
+
+function isPrivateHost(hostname: string): boolean {
+  if (hostname === "localhost" || hostname === "metadata.google.internal") return true;
+  const address = isIP(hostname);
+  if (address === 4) {
+    if (/^127\./.test(hostname) || /^10\./.test(hostname) || /^192\.168\./.test(hostname)) {
+      return true;
+    }
+    if (/^169\.254\./.test(hostname) || /^0\./.test(hostname)) return true;
+    const match = /^172\.(\d+)\./.exec(hostname);
+    return Boolean(match && Number(match[1]) >= 16 && Number(match[1]) <= 31);
+  }
+  if (address === 6) {
+    const normalized = hostname.toLowerCase();
+    return normalized === "::1"
+      || normalized.startsWith("fe80:")
+      || normalized.startsWith("fd")
+      || normalized.startsWith("fc");
+  }
+  return hostname.endsWith(".internal");
+}
+
+function evidencePolicy(
+  evidence: EvidenceConfig,
+  httpPrivateHostAllowlist?: readonly string[],
+): EvidencePreprocessingOutcome | undefined {
+  if (!evidence || evidence.source.type === "filesystem") return undefined;
+  if (evidence.source.type === "http") {
+    for (const value of evidence.source.uris) {
+      const host = new URL(value).hostname;
+      if (
+        isPrivateHost(host)
+        && !(evidence.source.allow_private_hosts && httpPrivateHostAllowlist?.includes(host))
+      ) {
+        return { status: "failed", code: "egress_policy_refused" };
+      }
+    }
+    return undefined;
+  }
+  if (
+    evidence.source.endpoint_url !== undefined
+    || evidence.source.credentials === "ambient"
+    || evidence.source.allow_private_endpoint
+    || evidence.source.allow_insecure_endpoint
+  ) {
+    return { status: "failed", code: "egress_policy_refused" };
+  }
+  return undefined;
+}
+
+function jobResult(job: EvidenceJobState): Pick<
+  EvidencePreprocessingOutcome,
+  "runId" | "childRuns" | "completedStages"
+> {
+  return {
+    runId: job.runId,
+    childRuns: { ...job.childRuns },
+    completedStages: [...job.completedStages],
+  };
+}
+
+async function runEvidenceStage(
+  request: EvidencePreprocessingRequest,
+  deps: EvidencePreprocessingDependencies,
+): Promise<EvidencePreprocessingOutcome> {
+  const payload = await deps.runStage([
+    "preprocess",
+    "evidence",
+    ...(request.dryRun ? ["--dry-run"] : []),
+    ...(request.job.childRuns.evidence
+      ? ["--resume", request.job.childRuns.evidence]
+      : []),
+    "--json",
+    "-c",
+    "/dev/fd/3",
+  ]);
+  if (typeof payload.run_id === "string") {
+    request.job.childRuns.evidence = deps.requireRunId(payload.run_id);
+  }
+  if (!request.dryRun && !request.job.completedStages.includes("evidence")) {
+    request.job.completedStages.push("evidence");
+  }
+  deps.persistJob();
+  return {
+    status: request.dryRun ? "dry_run" : "succeeded",
+    code: "ok",
+    ...jobResult(request.job),
+    counts: deps.numberRecord(payload.counts),
+  };
+}
+
+export async function preprocessEvidence(
+  request: EvidencePreprocessingRequest,
+  deps: EvidencePreprocessingDependencies,
+): Promise<EvidencePreprocessingOutcome> {
+  if (!request.evidence) {
+    return {
+      status: "unchanged",
+      code: "ok",
+      warnings: ["workspace has no Evidence source"],
+    };
+  }
+  const policy = evidencePolicy(request.evidence, request.httpPrivateHostAllowlist);
+  if (policy) return policy;
+  const semantic = await deps.semanticPreflight();
+  if (!semantic.ok) {
+    return { status: "failed", code: semantic.code, runId: request.job.runId };
+  }
+  if (request.job.completedStages.includes("evidence") && !request.dryRun) {
+    return {
+      status: "unchanged",
+      code: "ok",
+      runId: request.job.runId,
+      completedStages: [...request.job.completedStages],
+    };
+  }
+  return await runEvidenceStage(request, deps);
+}
+
+export async function continueEvidencePreprocessing(
+  request: Omit<EvidencePreprocessingRequest, "dryRun"> & {
+    priorCounts?: Record<string, number>;
+  },
+  deps: EvidencePreprocessingDependencies,
+): Promise<EvidencePreprocessingOutcome> {
+  if (!request.evidence) {
+    return {
+      status: "succeeded",
+      code: "ok",
+      ...jobResult(request.job),
+      warnings: ["workspace has no Evidence source"],
+      ...(request.priorCounts ? { counts: request.priorCounts } : {}),
+    };
+  }
+  const policy = evidencePolicy(request.evidence, request.httpPrivateHostAllowlist);
+  if (policy) return { ...policy, ...jobResult(request.job) };
+  if (!request.job.completedStages.includes("evidence")) {
+    return await runEvidenceStage(request, deps);
+  }
+  return { status: "unchanged", code: "ok", ...jobResult(request.job) };
+}

backend/src/workspaces/preprocessing-service.ts

@@ -1,7 +1,12 @@
 import { createHash, randomBytes } from "node:crypto";
 import { readdirSync, readFileSync, rmSync, writeFileSync, mkdirSync } from "node:fs";
-import { isIP } from "node:net";
 import { join } from "node:path";
+import {
+  continueEvidencePreprocessing,
+  preprocessEvidence as runEvidencePreprocessing,
+  type EvidencePreprocessingDependencies,
+  type EvidencePreprocessingOutcome,
+} from "./evidence/preprocessing.js";
 import type { WorkspaceDescriptor } from "./schema.js";
 import {
   PreprocessingStateStore,
@@ -104,26 +109,6 @@ function baseResult(
   };
 }
 
-function isPrivateHost(hostname: string): boolean {
-  if (hostname === "localhost" || hostname === "metadata.google.internal") return true;
-  const address = isIP(hostname);
-  if (address === 4) {
-    if (/^127\./.test(hostname) || /^10\./.test(hostname) || /^192\.168\./.test(hostname)) return true;
-    if (/^169\.254\./.test(hostname) || /^0\./.test(hostname)) return true;
-    const match = /^172\.(\d+)\./.exec(hostname);
-    return Boolean(match && Number(match[1]) >= 16 && Number(match[1]) <= 31);
-  }
-  if (address === 6) {
-    const normalized = hostname.toLowerCase();
-    return normalized === "::1" || normalized.startsWith("fe80:") || normalized.startsWith("fd") || normalized.startsWith("fc");
-  }
-  return hostname.endsWith(".internal");
-}
-
-function noEvidenceWarning(workspace: WorkspaceDescriptor): string[] {
-  return workspace.evidence === undefined ? ["workspace has no Evidence source"] : [];
-}
-
 export class WorkspacePreprocessingService {
   constructor(private readonly deps: WorkspacePreprocessingServiceDeps) {}
 
@@ -332,36 +317,16 @@ export class WorkspacePreprocessingService {
 
   async preprocessEvidence(options: { workspaceId: string; dryRun?: boolean; resumeRunId?: string }): Promise<WorkspaceOperationResult> {
     const scope = await this.startRun(options.workspaceId, "preprocess evidence", options.resumeRunId);
-    if (scope.runtime.workspace.evidence === undefined) {
-      return baseResult(scope.runtime, "preprocess evidence", "unchanged", "ok", {
-        warnings: noEvidenceWarning(scope.runtime.workspace),
-      });
-    }
-    const policy = this.evidencePolicy(scope.runtime.workspace);
-    if (policy !== undefined) return baseResult(scope.runtime, "preprocess evidence", policy.status, policy.code, { warnings: policy.warnings });
-    const semantic = await this.deps.semanticPreflight(scope.runtime.workspace);
-    if (!semantic.ok) return baseResult(scope.runtime, "preprocess evidence", "failed", semantic.code, { runId: scope.job.runId });
-    if (scope.job.completedStages.includes("evidence") && !options.dryRun) {
-      return baseResult(scope.runtime, "preprocess evidence", "unchanged", "ok", {
-        runId: scope.job.runId,
-        completedStages: [...scope.job.completedStages],
-      });
-    }
-    const payload = await this.runJsonStage(scope.runtime, [
-      "preprocess", "evidence",
-      ...(options.dryRun ? ["--dry-run"] : []),
-      ...(scope.job.childRuns.evidence ? ["--resume", scope.job.childRuns.evidence] : []),
-      "--json", "-c", "/dev/fd/3",
-    ]);
-    if (typeof payload.run_id === "string") scope.job.childRuns.evidence = this.requireRunId(payload.run_id);
-    if (!options.dryRun && !scope.job.completedStages.includes("evidence")) scope.job.completedStages.push("evidence");
-    this.state(scope.runtime.workspaceId).writeJob(scope.job);
-    return baseResult(scope.runtime, "preprocess evidence", options.dryRun ? "dry_run" : "succeeded", "ok", {
-      runId: scope.job.runId,
-      childRuns: { ...scope.job.childRuns },
-      completedStages: [...scope.job.completedStages],
-      counts: this.numberRecord(payload.counts),
-    });
+    const outcome = await runEvidencePreprocessing(
+      {
+        evidence: scope.runtime.workspace.evidence,
+        job: scope.job,
+        dryRun: options.dryRun,
+        httpPrivateHostAllowlist: this.deps.httpPrivateHostAllowlist,
+      },
+      this.evidenceDependencies(scope),
+    );
+    return this.evidenceResult(scope, "preprocess evidence", outcome);
   }
 
   async run(options: { workspaceId: string; resumeRunId?: string }): Promise<WorkspaceOperationResult> {
@@ -401,59 +366,23 @@ export class WorkspacePreprocessingService {
     }
     const semantic = await this.deps.semanticPreflight(scope.runtime.workspace);
     if (!semantic.ok) return baseResult(scope.runtime, "preprocess run", "failed", semantic.code, { runId: scope.job.runId });
+    let schemaCounts: Record<string, number> | undefined;
     if (!scope.job.completedStages.includes("schema_index")) {
       const payload = await this.runJsonStage(scope.runtime, ["vector", "index-schema", "--json", "-c", "/dev/fd/3"]);
       scope.job.completedStages.push("schema_index");
       this.state(scope.runtime.workspaceId).writeJob(scope.job);
-      const warnings = noEvidenceWarning(scope.runtime.workspace);
-      if (scope.runtime.workspace.evidence === undefined) {
-        return baseResult(scope.runtime, "preprocess run", "succeeded", "ok", {
-          runId: scope.job.runId,
-          childRuns: { ...scope.job.childRuns },
-          completedStages: [...scope.job.completedStages],
-          counts: this.numberRecord(payload.counts),
-          warnings,
-        });
+      schemaCounts = this.numberRecord(payload.counts);
     }
-    }
-    if (scope.runtime.workspace.evidence === undefined) {
-      return baseResult(scope.runtime, "preprocess run", "succeeded", "ok", {
-        runId: scope.job.runId,
-        childRuns: { ...scope.job.childRuns },
-        completedStages: [...scope.job.completedStages],
-        warnings: noEvidenceWarning(scope.runtime.workspace),
-      });
-    }
-    const policy = this.evidencePolicy(scope.runtime.workspace);
-    if (policy !== undefined) {
-      return baseResult(scope.runtime, "preprocess run", policy.status, policy.code, {
-        runId: scope.job.runId,
-        childRuns: { ...scope.job.childRuns },
-        completedStages: [...scope.job.completedStages],
-        warnings: policy.warnings,
-      });
-    }
-    if (!scope.job.completedStages.includes("evidence")) {
-      const payload = await this.runJsonStage(scope.runtime, [
-        "preprocess", "evidence",
-        ...(scope.job.childRuns.evidence ? ["--resume", scope.job.childRuns.evidence] : []),
-        "--json", "-c", "/dev/fd/3",
-      ]);
-      if (typeof payload.run_id === "string") scope.job.childRuns.evidence = this.requireRunId(payload.run_id);
-      scope.job.completedStages.push("evidence");
-      this.state(scope.runtime.workspaceId).writeJob(scope.job);
-      return baseResult(scope.runtime, "preprocess run", "succeeded", "ok", {
-        runId: scope.job.runId,
-        childRuns: { ...scope.job.childRuns },
-        completedStages: [...scope.job.completedStages],
-        counts: this.numberRecord(payload.counts),
-      });
-    }
-    return baseResult(scope.runtime, "preprocess run", "unchanged", "ok", {
-      runId: scope.job.runId,
-      childRuns: { ...scope.job.childRuns },
-      completedStages: [...scope.job.completedStages],
-    });
+    const outcome = await continueEvidencePreprocessing(
+      {
+        evidence: scope.runtime.workspace.evidence,
+        job: scope.job,
+        httpPrivateHostAllowlist: this.deps.httpPrivateHostAllowlist,
+        priorCounts: schemaCounts,
+      },
+      this.evidenceDependencies(scope),
+    );
+    return this.evidenceResult(scope, "preprocess run", outcome);
   }
 
   private async startRun(workspaceId: string, operation: string, resumeRunId?: string): Promise<RunScope> {
@@ -476,6 +405,25 @@ export class WorkspacePreprocessingService {
     return new PreprocessingStateStore({ dataRoot: this.deps.dataRoot, workspaceId });
   }
 
+  private evidenceDependencies(scope: RunScope): EvidencePreprocessingDependencies {
+    return {
+      runStage: async (argv) => await this.runJsonStage(scope.runtime, argv),
+      persistJob: () => this.state(scope.runtime.workspaceId).writeJob(scope.job),
+      semanticPreflight: async () => await this.deps.semanticPreflight(scope.runtime.workspace),
+      requireRunId: (value) => this.requireRunId(value),
+      numberRecord: (value) => this.numberRecord(value),
+    };
+  }
+
+  private evidenceResult(
+    scope: RunScope,
+    operation: "preprocess evidence" | "preprocess run",
+    outcome: EvidencePreprocessingOutcome,
+  ): WorkspaceOperationResult {
+    const { status, code, ...extra } = outcome;
+    return baseResult(scope.runtime, operation, status, code, extra);
+  }
+
   private async runSuggestStage(
     scope: RunScope,
     fromSql: ReadonlyArray<{ name: string; sql: string }>,
@@ -581,33 +529,4 @@ export class WorkspacePreprocessingService {
     return undefined;
   }
 
-  private evidencePolicy(workspace: WorkspaceDescriptor): {
-    status: WorkspaceOperationResult["status"];
-    code: WorkspaceOperationResult["code"];
-    warnings?: string[];
-  } | undefined {
-    const evidence = workspace.evidence;
-    if (!evidence) return undefined;
-    // P6: filesystem Evidence is materialized from the pinned commit at activation, so the
-    // engine may proceed directly against the immutable revision content root.
-    if (evidence.source.type === "filesystem") return undefined;
-    if (evidence.source.type === "http") {
-      for (const value of evidence.source.uris) {
-        const host = new URL(value).hostname;
-        if (isPrivateHost(host) && !(evidence.source.allow_private_hosts && this.deps.httpPrivateHostAllowlist?.includes(host))) {
-          return { status: "failed", code: "egress_policy_refused" };
-        }
-      }
-      return undefined;
-    }
-    if (
-      evidence.source.endpoint_url !== undefined
-      || evidence.source.credentials === "ambient"
-      || evidence.source.allow_private_endpoint
-      || evidence.source.allow_insecure_endpoint
-    ) {
-      return { status: "failed", code: "egress_policy_refused" };
-    }
-    return undefined;
-  }
 }

backend/src/workspaces/registry.ts

@@ -5,7 +5,7 @@ import { isAbsolute, join } from "node:path";
 import { buildInstallationContract, renderWorkspaceDocs } from "./contracts.js";
 import { parseAnnotationsYaml } from "./annotations.js";
 import { syncAnnotations } from "./annotations-sync.js";
-import { materializeEvidenceTree } from "./evidence-materialization.js";
+import { materializeEvidenceTree } from "./evidence/materialization.js";
 import { assertCatalogMatchesDescriptor, parseWorkspaceCatalogYaml, type WorkspaceCatalog, type WorkspaceCatalogEntry } from "./catalog.js";
 import {
   GitWorkspaceRepository,

backend/test/workspaces/evidence/boundary.test.ts

@@ -0,0 +1,34 @@
+import { readdirSync, readFileSync } from "node:fs";
+import { basename, join } from "node:path";
+import { fileURLToPath } from "node:url";
+import ts from "typescript";
+import { expect, test } from "vitest";
+
+const evidenceRoot = fileURLToPath(new URL("../../../src/workspaces/evidence/", import.meta.url));
+const coreInfrastructure = new Set([
+  "preprocessing-service",
+  "qdrant-collection",
+  "registry",
+]);
+
+test("Evidence modules do not import core-owned registry or Qdrant lifecycle", () => {
+  const violations: Array<{ file: string; dependency: string }> = [];
+  for (const file of readdirSync(evidenceRoot).filter((name) => name.endsWith(".ts"))) {
+    const source = ts.createSourceFile(
+      file,
+      readFileSync(join(evidenceRoot, file), "utf8"),
+      ts.ScriptTarget.Latest,
+      true,
+      ts.ScriptKind.TS,
+    );
+    for (const statement of source.statements) {
+      if (!ts.isImportDeclaration(statement) || !ts.isStringLiteral(statement.moduleSpecifier)) {
+        continue;
+      }
+      const dependency = basename(statement.moduleSpecifier.text).replace(/\.js$/, "");
+      if (coreInfrastructure.has(dependency)) violations.push({ file, dependency });
+    }
+  }
+
+  expect(violations).toEqual([]);
+});

backend/test/workspaces/evidence/materialization.test.ts

@@ -4,9 +4,9 @@ import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { promisify } from "node:util";
 import { afterEach, expect, test } from "vitest";
-import { GitWorkspaceRepository } from "../src/workspaces/git-repository.js";
-import { materializeEvidenceTree } from "../src/workspaces/evidence-materialization.js";
-import type { WorkspaceRegistryConfig } from "../src/workspaces/types.js";
+import { GitWorkspaceRepository } from "../../../src/workspaces/git-repository.js";
+import { materializeEvidenceTree } from "../../../src/workspaces/evidence/materialization.js";
+import type { WorkspaceRegistryConfig } from "../../../src/workspaces/types.js";
 
 const runFile = promisify(execFile);
 const temporaryRoots: string[] = [];

backend/test/workspaces/evidence/preprocessing.test.ts

@@ -0,0 +1,161 @@
+import { expect, test, vi } from "vitest";
+import {
+  continueEvidencePreprocessing,
+  preprocessEvidence,
+  type EvidenceJobState,
+  type EvidencePreprocessingDependencies,
+} from "../../../src/workspaces/evidence/preprocessing.js";
+import type { WorkspaceDescriptor } from "../../../src/workspaces/schema.js";
+
+type EvidenceConfig = NonNullable<WorkspaceDescriptor["evidence"]>;
+
+const filesystemEvidence = {
+  source: { type: "filesystem", uri: "research/evidence" },
+} as EvidenceConfig;
+
+const privateHttpEvidence = {
+  source: {
+    type: "http",
+    uris: ["http://127.0.0.1/private.md"],
+    authentication: "none",
+    connect_timeout_ms: 1000,
+    read_timeout_ms: 2000,
+    max_bytes: 100,
+    max_redirects: 0,
+    allow_private_hosts: true,
+    max_cache_bytes: 100,
+  },
+} as EvidenceConfig;
+
+function job(overrides: Partial<EvidenceJobState> = {}): EvidenceJobState {
+  return {
+    runId: "a".repeat(32),
+    childRuns: {},
+    completedStages: [],
+    ...overrides,
+  };
+}
+
+function dependencies(payload: Record<string, unknown> = {}): EvidencePreprocessingDependencies & {
+  runStage: ReturnType<typeof vi.fn>;
+  persistJob: ReturnType<typeof vi.fn>;
+  semanticPreflight: ReturnType<typeof vi.fn>;
+} {
+  return {
+    runStage: vi.fn(async () => payload),
+    persistJob: vi.fn(),
+    semanticPreflight: vi.fn(async () => ({ ok: true as const })),
+    requireRunId(value) {
+      if (typeof value !== "string" || !/^[0-9a-f]{32}$/.test(value)) {
+        throw new Error("child run id is invalid");
+      }
+      return value;
+    },
+    numberRecord(value) {
+      if (!value || typeof value !== "object" || Array.isArray(value)) return undefined;
+      return Object.fromEntries(
+        Object.entries(value as Record<string, unknown>).map(([key, nested]) => [key, Number(nested)]),
+      );
+    },
+  };
+}
+
+test("owns the standalone Evidence stage argv and mutation order", async () => {
+  const state = job({ childRuns: { evidence: "b".repeat(32) } });
+  const deps = dependencies({ run_id: "c".repeat(32), counts: { added: 2 } });
+
+  const result = await preprocessEvidence(
+    { evidence: filesystemEvidence, job: state, dryRun: false },
+    deps,
+  );
+
+  expect(deps.semanticPreflight).toHaveBeenCalledOnce();
+  expect(deps.runStage).toHaveBeenCalledWith([
+    "preprocess", "evidence", "--resume", "b".repeat(32), "--json", "-c", "/dev/fd/3",
+  ]);
+  expect(deps.persistJob).toHaveBeenCalledOnce();
+  expect(state).toMatchObject({
+    childRuns: { evidence: "c".repeat(32) },
+    completedStages: ["evidence"],
+  });
+  expect(result).toEqual({
+    status: "succeeded",
+    code: "ok",
+    runId: "a".repeat(32),
+    childRuns: { evidence: "c".repeat(32) },
+    completedStages: ["evidence"],
+    counts: { added: 2 },
+  });
+});
+
+test("owns Evidence egress refusal before shared semantic infrastructure", async () => {
+  const deps = dependencies();
+
+  const result = await preprocessEvidence(
+    {
+      evidence: privateHttpEvidence,
+      job: job(),
+      httpPrivateHostAllowlist: ["metadata.internal"],
+    },
+    deps,
+  );
+
+  expect(result).toEqual({ status: "failed", code: "egress_policy_refused" });
+  expect(deps.semanticPreflight).not.toHaveBeenCalled();
+  expect(deps.runStage).not.toHaveBeenCalled();
+  expect(deps.persistJob).not.toHaveBeenCalled();
+});
+
+test("projects aggregate no-Evidence and completed-stage outcomes without rerunning", async () => {
+  const deps = dependencies();
+  const noEvidence = await continueEvidencePreprocessing(
+    {
+      evidence: undefined,
+      job: job({ completedStages: ["dwh", "schema_index"] }),
+      priorCounts: { added: 2 },
+    },
+    deps,
+  );
+  const completed = await continueEvidencePreprocessing(
+    {
+      evidence: filesystemEvidence,
+      job: job({ completedStages: ["dwh", "schema_index", "evidence"] }),
+    },
+    deps,
+  );
+
+  expect(noEvidence).toMatchObject({
+    status: "succeeded",
+    code: "ok",
+    warnings: ["workspace has no Evidence source"],
+    counts: { added: 2 },
+  });
+  expect(completed).toMatchObject({
+    status: "unchanged",
+    code: "ok",
+    completedStages: ["dwh", "schema_index", "evidence"],
+  });
+  expect(deps.runStage).not.toHaveBeenCalled();
+  expect(deps.persistJob).not.toHaveBeenCalled();
+});
+
+test("preserves the narrow standalone projection for an already completed Evidence stage", async () => {
+  const deps = dependencies();
+
+  const result = await preprocessEvidence(
+    {
+      evidence: filesystemEvidence,
+      job: job({ childRuns: { evidence: "b".repeat(32) }, completedStages: ["evidence"] }),
+    },
+    deps,
+  );
+
+  expect(result).toEqual({
+    status: "unchanged",
+    code: "ok",
+    runId: "a".repeat(32),
+    completedStages: ["evidence"],
+  });
+  expect(deps.runStage).not.toHaveBeenCalled();
+  expect(deps.persistJob).not.toHaveBeenCalled();
+});

docs/contracts/workflow-observable-baseline.md

@@ -59,7 +59,10 @@ From `backend/`, the passing automated baseline is:
 npx vitest run test/tht-runner.test.ts test/pi-process-manager.test.ts \
   test/session-bridge.test.ts test/sse-hub.test.ts test/sse-route.test.ts \
   test/routes-sessions.test.ts test/e2e-f1.test.ts \
-  test/workspace-preprocessing-service.test.ts test/evidence-materialization.test.ts
+  test/workspace-preprocessing-service.test.ts \
+  test/workspaces/evidence/materialization.test.ts \
+  test/workspaces/evidence/preprocessing.test.ts \
+  test/workspaces/evidence/boundary.test.ts
 npx tsc --noEmit -p .
 npm run build
 ```