Fix evidence archive blob keys for the context store

Context store blob keys cannot contain slashes, so archive
occurrences failed to persist. Hash overflow blobs after scrub
and admit string send the same way as inbound messages.

Author: TheGreatAxios

src/plugins/result-truncation-plugin.ts

@@ -328,10 +328,17 @@ async function archiveThenTruncate(
     before.length > MAX_RESULT_CHARS
   ) {
     try {
+      const spilled =
+        typeof before === "string"
+          ? scrubSecretShapedContent(materializeToolResultContent(before).text)
+          : scrubSecretShapedContent(
+              materializeToolResultRecord(before as Record<string, unknown>)
+                .text,
+            );
       await archive.recordExistingBlobReference({
         kind: "overflow_blob",
         blobKey: spillBlobKey(callId),
-        contentHash: hashAuthorizedBytes(new TextEncoder().encode(before)),
+        contentHash: hashAuthorizedBytes(new TextEncoder().encode(spilled)),
         callId,
         provenance: "result-truncation:full",
       });

src/session/assemble-runtime.ts

@@ -59,6 +59,7 @@ import {
   createCompactionArchive,
   createPrimaryDeliveryAdmission,
   wrapAuthorizeWithEvidenceArchive,
+  wrapCompactorWithCompletenessGate,
   type CompactionArchive,
 } from "./compaction-archive.js";
 import path from "node:path";
@@ -539,7 +540,10 @@ export function assembleChatAgent(wiring: ChatAgentWiring): AssembledChatAgent {
         defaultId: `${ID_PREFIX}/chat`,
       }),
       compactors: {
-        "pruning-compactor": wiring.getCompactor(),
+        "pruning-compactor":
+          primaryArchive === undefined
+            ? wiring.getCompactor()
+            : wrapCompactorWithCompletenessGate(wiring.getCompactor(), primaryArchive),
       },
     });
     const admittedAgent =

src/session/attachment-store.ts

@@ -12,7 +12,7 @@ import {
   formatAgedImageMarker,
   parseAgedImageMarker,
 } from "./attachment-uri.js";
-import { hashAuthorizedBytes, type CompactionArchive } from "./compaction-archive.js";
+import { type CompactionArchive } from "./compaction-archive.js";
 
 export interface AgeImageResult {
   turn: ConversationTurn;
@@ -71,14 +71,8 @@ export async function ageImageBlocks(
       bytes,
       contentType: block.source.mimeType,
     });
-    if (options.archive !== undefined) {
-      await options.archive.recordExistingBlobReference({
-        kind: "attachment",
-        blobKey: id,
-        contentHash: hashAuthorizedBytes(bytes),
-        provenance: "attachment-age:base64",
-      });
-    }
+    // recordExistingBlobReference before persistBlobs marks a false gap.
+    // Callers that already wrote the blob may record after this returns.
     content.push({
       type: "text",
       text: formatAgedImageMarker({ uri, mimeType: block.source.mimeType }),

src/session/compaction-archive.test.ts

@@ -15,6 +15,7 @@ import {
   hashAuthorizedBytes,
   isControlOrEmptyInbound,
 } from "./compaction-archive.js";
+import { createOptimizedContextStore } from "./optimized-context-store.js";
 
 function tempDir(): string {
   return fs.mkdtempSync(path.join(os.tmpdir(), "compaction-archive-"));
@@ -122,8 +123,12 @@ describe("primary message admission", () => {
       deliver(message: InboundMessage) {
         delivered.push(message);
       },
-      async send(message: InboundMessage) {
-        delivered.push(message);
+      async send(content: string | InboundMessage) {
+        if (typeof content === "string") {
+          delivered.push(inbound({ content }));
+          return { ok: true as const };
+        }
+        delivered.push(content);
         return { ok: true as const };
       },
     };
@@ -155,8 +160,12 @@ describe("primary message admission", () => {
       deliver(message: InboundMessage) {
         delivered.push(message);
       },
-      async send(message: InboundMessage) {
-        delivered.push(message);
+      async send(content: string | InboundMessage) {
+        if (typeof content === "string") {
+          delivered.push(inbound({ content }));
+          return { ok: true as const };
+        }
+        delivered.push(content);
         return { ok: true as const };
       },
     };
@@ -173,6 +182,43 @@ describe("primary message admission", () => {
     const archived = await archive.readAuthorizedPayload(occurrences[0]!.occurrenceId);
     expect(archived).toBe(admitted);
   });
+
+  test("send(string) admits and archives like InboundMessage", async () => {
+    const dir = tempDir();
+    const blobs = new Map<string, Uint8Array>();
+    const archive = createCompactionArchive({
+      sessionId: "sess-send-string",
+      contextDir: dir,
+      writeBlob: async (key, bytes) => {
+        blobs.set(key, bytes);
+      },
+      readBlob: async (key) => {
+        const bytes = blobs.get(key);
+        if (bytes === undefined) throw new Error(`missing blob ${key}`);
+        return bytes;
+      },
+    });
+    const sent: string[] = [];
+    const agent = {
+      deliver(_message: InboundMessage) {
+        /* unused */
+      },
+      async send(content: string | InboundMessage) {
+        if (typeof content !== "string") throw new Error("expected string send");
+        sent.push(content);
+        return { ok: true as const };
+      },
+    };
+    const wrapped = createPrimaryDeliveryAdmission(agent, archive);
+    const secret = `sk-${"a".repeat(24)}`;
+    await wrapped.send(`constraint ${secret}`);
+    expect(sent).toHaveLength(1);
+    expect(sent[0]).toContain(CREDENTIAL_REDACTION);
+    expect(sent[0]).not.toContain(secret);
+    const occurrences = await archive.listOccurrences();
+    expect(occurrences).toHaveLength(1);
+    expect(await archive.readAuthorizedPayload(occurrences[0]!.occurrenceId)).toBe(sent[0]!);
+  });
 });
 
 describe("compaction archive storage", () => {
@@ -451,4 +497,187 @@ describe("compaction archive storage", () => {
     const cert = await archive.certifyRange([occ.occurrenceId]);
     expect(cert.status).toBe("complete");
   });
+
+  test("recordAuthorizedPayload writes store-legal keys through createOptimizedContextStore", async () => {
+    const dir = tempDir();
+    const store = await createOptimizedContextStore(dir);
+    const archive = createCompactionArchive({
+      sessionId: "sess-store-keys",
+      contextDir: dir,
+      writeBlob: (key, bytes, contentType) => store.writeBlob(key, bytes, contentType),
+      readBlob: (key) => store.readBlob(key),
+    });
+    const occ = await archive.recordAuthorizedPayload({
+      kind: "user_message",
+      payload: "hello-store",
+    });
+    expect(occ.blobKey.includes("/")).toBe(false);
+    expect(occ.blobKey.includes("..")).toBe(false);
+    expect(await archive.readAuthorizedPayload(occ.occurrenceId)).toBe("hello-store");
+  });
+});
+
+describe("wrapCompactorWithCompletenessGate", () => {
+  const ctx = { trigger: "test" } as unknown as import("@intx/types/runtime").StrategyContext;
+
+  function truncating(name: string): import("@intx/types/runtime").Compactor {
+    return {
+      name,
+      version: "1",
+      async apply(turns) {
+        return {
+          output: turns.slice(-1),
+          blobs: [
+            {
+              key: "stats",
+              bytes: new TextEncoder().encode("{}"),
+              contentType: "application/json",
+            },
+          ],
+          record: {
+            strategy: name,
+            version: "1",
+            parameters: {},
+            reason: "compact",
+            decisions: { dropped: turns.length - 1 },
+          },
+        };
+      },
+    };
+  }
+
+  function memoryArchive() {
+    const dir = tempDir();
+    const blobs = new Map<string, Uint8Array>();
+    const archive = createCompactionArchive({
+      sessionId: "sess-gate",
+      contextDir: dir,
+      writeBlob: async (key, bytes) => {
+        blobs.set(key, bytes);
+      },
+      readBlob: async (key) => {
+        const bytes = blobs.get(key);
+        if (bytes === undefined) throw new Error(`missing ${key}`);
+        return bytes;
+      },
+    });
+    return { archive, blobs };
+  }
+
+  test("incomplete archive returns identity history and drops stats blobs", async () => {
+    const { wrapCompactorWithCompletenessGate } = await import("./compaction-archive.js");
+    const { archive } = memoryArchive();
+    const inner = truncating("pruning-compactor");
+    const wrapped = wrapCompactorWithCompletenessGate(inner, archive);
+    const turns: import("@intx/types/runtime").ConversationTurn[] = [
+      {
+        role: "user",
+        content: [{ type: "text", text: "secret-fact" }],
+        timestamp: 1,
+      },
+      {
+        role: "assistant",
+        content: [
+          { type: "tool_call", id: "call-drop", name: "read_file", arguments: { path: "a.ts" } },
+        ],
+        timestamp: 2,
+      },
+      {
+        role: "user",
+        content: [
+          { type: "tool_result", callId: "call-drop", content: [{ type: "text", text: "ok" }] },
+        ],
+        timestamp: 3,
+      },
+    ];
+
+    const result = await wrapped.apply(turns, ctx);
+    expect(result.output).toBe(turns);
+    expect(result.blobs).toBeUndefined();
+    expect(result.record.reason).toBe("incomplete-evidence-archive");
+  });
+
+  test("complete archive covering dropped callIds allows the rewrite", async () => {
+    const { wrapCompactorWithCompletenessGate } = await import("./compaction-archive.js");
+    const { archive } = memoryArchive();
+    await archive.recordAuthorizedPayload({
+      kind: "tool_args",
+      payload: { name: "read_file", arguments: { path: "a.ts" } },
+      callId: "call-drop",
+    });
+    await archive.recordAuthorizedPayload({
+      kind: "tool_result",
+      payload: "ok",
+      callId: "call-drop",
+    });
+    await archive.recordAuthorizedPayload({
+      kind: "user_message",
+      payload: "secret-fact",
+    });
+
+    const inner = truncating("pruning-compactor");
+    const wrapped = wrapCompactorWithCompletenessGate(inner, archive);
+    const turns: import("@intx/types/runtime").ConversationTurn[] = [
+      {
+        role: "user",
+        content: [{ type: "text", text: "secret-fact" }],
+        timestamp: 1,
+      },
+      {
+        role: "assistant",
+        content: [
+          { type: "tool_call", id: "call-drop", name: "read_file", arguments: { path: "a.ts" } },
+        ],
+        timestamp: 2,
+      },
+      {
+        role: "user",
+        content: [
+          { type: "tool_result", callId: "call-drop", content: [{ type: "text", text: "ok" }] },
+        ],
+        timestamp: 3,
+      },
+    ];
+
+    const result = await wrapped.apply(turns, ctx);
+    expect(result.output).toHaveLength(1);
+    expect(result.blobs?.some((b) => b.key === "stats")).toBe(true);
+    expect(result.record.reason).toBe("compact");
+  });
+
+  test("explicit gap records are not required for completeness", async () => {
+    const { wrapCompactorWithCompletenessGate } = await import("./compaction-archive.js");
+    const { archive } = memoryArchive();
+    await archive.importHistoricalEvidence([
+      { kind: "user_message", available: false, callId: "historical-gap" },
+    ]);
+    await archive.recordAuthorizedPayload({
+      kind: "tool_result",
+      payload: "ok",
+      callId: "call-drop",
+    });
+    await archive.recordAuthorizedPayload({
+      kind: "user_message",
+      payload: "secret-fact",
+    });
+
+    const wrapped = wrapCompactorWithCompletenessGate(truncating("pruning-compactor"), archive);
+    const turns: import("@intx/types/runtime").ConversationTurn[] = [
+      {
+        role: "user",
+        content: [{ type: "text", text: "secret-fact" }],
+        timestamp: 1,
+      },
+      {
+        role: "user",
+        content: [
+          { type: "tool_result", callId: "call-drop", content: [{ type: "text", text: "ok" }] },
+        ],
+        timestamp: 2,
+      },
+    ];
+    const result = await wrapped.apply(turns, ctx);
+    expect(result.output).toHaveLength(1);
+    expect(result.record.reason).toBe("compact");
+  });
 });