fix: emit real checkpoint artifact for wrapper integration

hooks/force-recall/handler.ts

@@ -46,6 +46,23 @@ async function safeReadText(filePath: string): Promise<string | null> {
   }
 }
 
+async function getReadableCheckpointArtifact(workspaceDir: string, wrapperResult: any): Promise<{ relativePath: string; absolutePath: string; content: string; } | null> {
+  const relativePath = typeof wrapperResult?.externalizedCheckpointPath === "string"
+    ? wrapperResult.externalizedCheckpointPath.trim()
+    : "";
+  if (!relativePath) return null;
+
+  const absolutePath = path.resolve(workspaceDir, relativePath);
+  try {
+    const raw = await fs.readFile(absolutePath, "utf-8");
+    const content = raw.trim();
+    if (!content) return null;
+    return { relativePath, absolutePath, content };
+  } catch {
+    return null;
+  }
+}
+
 async function runJsonScript(scriptPath: string, workspaceDir: string, input: Record<string, unknown>, timeout: number): Promise<any | null> {
   let tempInputPath: string | null = null;
 
@@ -95,7 +112,7 @@ async function runLongTaskWrapper(workspaceDir: string, ctx: any): Promise<any |
   return runJsonScript(wrapperPath, workspaceDir, input, LONG_TASK_WRAPPER_TIMEOUT_MS);
 }
 
-function buildProgressEvidence(wrapperResult: any): Record<string, unknown> | null {
+function buildProgressEvidence(wrapperResult: any, readableCheckpointArtifact: { relativePath: string; absolutePath: string; content: string; } | null): Record<string, unknown> | null {
   const candidate = wrapperResult?.progressEvidence;
   if (!candidate || typeof candidate !== "object" || Array.isArray(candidate)) {
     return null;
@@ -128,6 +145,13 @@ function buildProgressEvidence(wrapperResult: any): Record<string, unknown> | nu
     progressEvidence.verificationResult = verificationResult;
   }
 
+  if (readableCheckpointArtifact) {
+    progressEvidence.checkpointPath = readableCheckpointArtifact.relativePath;
+    if (!progressEvidence.verificationResult) {
+      progressEvidence.verificationResult = `checkpoint artifact readable at ${readableCheckpointArtifact.relativePath}`;
+    }
+  }
+
   return Object.keys(progressEvidence).length > 0 ? progressEvidence : null;
 }
 
@@ -158,14 +182,14 @@ function shouldClaimProgression(wrapperResult: any, progressEvidence: Record<str
   return wrapperResult.silentLaunchOk === true;
 }
 
-function buildGateLockInput(wrapperResult: any): Record<string, unknown> {
+function buildGateLockInput(wrapperResult: any, readableCheckpointArtifact: { relativePath: string; absolutePath: string; content: string; } | null): Record<string, unknown> {
   if (!wrapperResult || wrapperResult.classification !== "long_task") {
     return { classification: wrapperResult?.classification ?? "general_chat" };
   }
 
   const needsOwnerDecision = wrapperResult.needsOwnerDecision === true;
   const silentCandidate = wrapperResult.silentCandidate === true;
-  const progressEvidence = buildProgressEvidence(wrapperResult);
+  const progressEvidence = buildProgressEvidence(wrapperResult, readableCheckpointArtifact);
   const requiredNextAction = typeof wrapperResult.requiredNextAction === "string"
     ? wrapperResult.requiredNextAction.trim()
     : "";
@@ -197,8 +221,7 @@ function buildGateLockInput(wrapperResult: any): Record<string, unknown> {
   const progressEvidenceReason = claimedProgression && !progressEvidence
     ? "progression claim requires concrete evidence such as sessionKey, runId, modified_files, or verification result"
     : "";
-  const hasExternalizedCheckpointEvidence = typeof wrapperResult.externalizedCheckpointPath === "string"
-    && wrapperResult.externalizedCheckpointPath.trim().length > 0;
+  const hasExternalizedCheckpointEvidence = Boolean(readableCheckpointArtifact);
   const hasButtonPathClosureEvidence = needsOwnerDecision && wrapperResult.silentLaunchOk === true;
 
   return {
@@ -228,8 +251,8 @@ function buildGateLockInput(wrapperResult: any): Record<string, unknown> {
     dispatchEvidence: "",
     fileChangeEvidence: "",
     verificationEvidence: "",
-    checkpointArtifactEvidence: hasExternalizedCheckpointEvidence ? wrapperResult.externalizedCheckpointPath.trim() : "",
-    externalizedCheckpointPath: hasExternalizedCheckpointEvidence ? wrapperResult.externalizedCheckpointPath.trim() : "",
+    checkpointArtifactEvidence: hasExternalizedCheckpointEvidence ? readableCheckpointArtifact.relativePath : "",
+    externalizedCheckpointPath: hasExternalizedCheckpointEvidence ? readableCheckpointArtifact.relativePath : "",
     externalizedTrigger: hasExternalizedCheckpointEvidence ? "hook-preflight-checkpoint" : "",
     handoffMode: hasButtonPathClosureEvidence ? (wrapperResult.handoff?.mode ?? "button_path") : "direct_reply",
     replyClosureMode: hasButtonPathClosureEvidence ? (wrapperResult.handoff?.mode ?? "button_path") : "direct_reply",
@@ -238,7 +261,8 @@ function buildGateLockInput(wrapperResult: any): Record<string, unknown> {
 
 async function runLongTaskGateLock(workspaceDir: string, wrapperResult: any): Promise<GateLockResult | null> {
   const gateLockPath = path.join(workspaceDir, "scripts", "long_task_gate_lock.mjs");
-  const input = buildGateLockInput(wrapperResult);
+  const readableCheckpointArtifact = await getReadableCheckpointArtifact(workspaceDir, wrapperResult);
+  const input = buildGateLockInput(wrapperResult, readableCheckpointArtifact);
   return runJsonScript(gateLockPath, workspaceDir, input, LONG_TASK_GATE_LOCK_TIMEOUT_MS);
 }
 

scripts/long_task_governor_wrapper.mjs

@@ -1,5 +1,6 @@
 #!/usr/bin/env node
 import fs from 'fs';
+import path from 'path';
 
 function fail(code, message) {
   process.stderr.write(`${code}: ${message}\n`);
@@ -124,6 +125,35 @@ function toSlug(value) {
     .slice(0, 48);
 }
 
+function ensureCheckpointArtifact(externalizedCheckpointPath, input, classificationResult) {
+  if (classificationResult.classification !== 'long_task') return null;
+  if (!classificationResult.silentCandidate) return null;
+  if (!externalizedCheckpointPath) return null;
+
+  const artifactPath = path.resolve(process.cwd(), externalizedCheckpointPath);
+  const artifact = {
+    kind: 'long_task_checkpoint',
+    triggerKind: input.triggerKind || 'artifact',
+    checkpointTrigger: input.checkpointTrigger || '',
+    currentStep: input.currentStep || '',
+    nextStep: input.nextStep || '',
+    waitingOn: input.waitingOn || '',
+    blocker: input.blocker || '',
+  };
+
+  fs.mkdirSync(path.dirname(artifactPath), { recursive: true });
+  fs.writeFileSync(artifactPath, JSON.stringify(artifact, null, 2) + '\n', 'utf8');
+
+  const stats = fs.statSync(artifactPath);
+  const readable = fs.readFileSync(artifactPath, 'utf8');
+
+  return {
+    absolutePath: artifactPath,
+    bytes: stats.size,
+    readable: readable.trim().length > 0,
+  };
+}
+
 function buildExternalizedCheckpointPath(input, classificationResult) {
   if (classificationResult.classification !== 'long_task') return '';
   if (!classificationResult.silentCandidate) return '';
@@ -138,14 +168,16 @@ function buildExternalizedCheckpointPath(input, classificationResult) {
   return `checkpoints/${stableSeed}.json`;
 }
 
-function buildProgressEvidence(input, classificationResult, externalizedCheckpointPath) {
+function buildProgressEvidence(input, classificationResult, externalizedCheckpointPath, checkpointArtifact) {
   if (classificationResult.classification !== 'long_task') return null;
   if (!classificationResult.silentCandidate) return null;
   if (!externalizedCheckpointPath) return null;
+  if (!checkpointArtifact || checkpointArtifact.readable !== true) return null;
 
   return {
     sessionKey: toSlug([input.currentStep, input.waitingOn, input.nextStep].filter(Boolean).join('-')) || 'long-task-session',
     checkpointPath: externalizedCheckpointPath,
+    verificationResult: `checkpoint artifact readable at ${externalizedCheckpointPath}`,
   };
 }
 
@@ -197,7 +229,8 @@ function main() {
   const classificationResult = classify(input);
   const taskRecord = bootstrapTaskState(input, classificationResult);
   const externalizedCheckpointPath = buildExternalizedCheckpointPath(input, classificationResult);
-  const progressEvidence = buildProgressEvidence(input, classificationResult, externalizedCheckpointPath);
+  const checkpointArtifact = ensureCheckpointArtifact(externalizedCheckpointPath, input, classificationResult);
+  const progressEvidence = buildProgressEvidence(input, classificationResult, externalizedCheckpointPath, checkpointArtifact);
   const silentLaunch = validateSilentLaunch(input, classificationResult);
   const handoff = planHandoff(classificationResult);
 
@@ -210,6 +243,7 @@ function main() {
     taskRecord,
     progressEvidence,
     externalizedCheckpointPath,
+    checkpointArtifact,
     silentLaunchOk: silentLaunch.ok,
     silentLaunchReason: silentLaunch.reason,
     recommendedFallback: silentLaunch.recommendedFallback,