diff --git a/LifeOS/install/LIFEOS/DOCUMENTATION/Hooks/HookSystem.md b/LifeOS/install/LIFEOS/DOCUMENTATION/Hooks/HookSystem.md
index eba29547d8..bc116c2b3a 100755
--- a/LifeOS/install/LIFEOS/DOCUMENTATION/Hooks/HookSystem.md
+++ b/LifeOS/install/LIFEOS/DOCUMENTATION/Hooks/HookSystem.md
@@ -382,7 +382,8 @@ Each check is wrapped in its own try/catch so one guard throwing can never suppr
         { "type": "command", "command": "$HOME/.claude/hooks/EventLogger.hook.ts", "timeout": 5, "async": true }
     ] },
     { "matcher": "Bash", "hooks": [
-        { "type": "command", "command": "$HOME/.claude/hooks/AtlasEventCapture.hook.ts", "timeout": 5 }
+        { "type": "command", "command": "$HOME/.claude/hooks/AtlasEventCapture.hook.ts", "timeout": 5 },
+        { "type": "command", "command": "$HOME/.claude/hooks/BashWriteRelay.hook.ts", "timeout": 20 }
     ] }
   ]
 }
@@ -397,6 +398,13 @@ Each check is wrapped in its own try/catch so one guard throwing can never suppr
 
 **TabState.hook.ts** *(matcher `AskUserQuestion`; formerly `QuestionAnswered.hook.ts`)* - Restores the tab to working/orange after the user answers. Same unified file handles the PreToolUse question branch and the Stop reset.
 
+**BashWriteRelay.hook.ts** *(matcher `Bash`)* - Replay the Write-shaped hooks for files a Bash call wrote
+- Closes upstream #2079: `defaultMode: auto` steers file writes to Bash, and ISASync, CheckpointPerISC, ConfigEvalFire and SystemChangeSurface watch only Write/Edit/MultiEdit, so a heredoc-written ISA never reached work.json
+- Detects changes by mtime on a bounded set of watched roots (doctrine, prompt, ALGORITHM, RULES, TOOLS, hooks, skills, settings, USER identity files, MEMORY/WORK ISAs, plus ISA paths already in work.json) since its last run for the session; never parses the command
+- First Bash call of a session only records a baseline; a change set over 40 files is logged and skipped; each changed file is replayed through the four hooks with a synthesized Write payload and their `additionalContext` is concatenated
+- State `MEMORY/STATE/bash-write-relay/{session}.json`, log `MEMORY/OBSERVABILITY/bash-write-relay.jsonl`; always exits 0
+- Limit: detection is per session by time window, so with two sessions writing under `~/.claude` at once a sibling session's write between two of this session's Bash calls is attributed here. The ⚙️ line is disclosure, not authority; a transcript cross-check would close it
+
 **ISASync.hook.ts** *(matchers `Write`, `Edit`, `MultiEdit`)* - ISA Frontmatter → work.json Sync
 - Fires after Write/Edit/MultiEdit to ISA files in `MEMORY/WORK/`; syncs ISA frontmatter (status, title, effort) to `MEMORY/STATE/work.json`; non-blocking, fire-and-forget
 - Uses `hooks/lib/isa-utils.ts::appendPhase()` for phaseHistory with `source: "prd"` (the other source being voice notifications), dedup via upgrade to `source: "merged"`. See `LIFEOS/MEMORY/KNOWLEDGE/Ideas/dual-source-event-tracking-pattern.md`.
diff --git a/LifeOS/install/hooks/BashWriteRelay.hook.ts b/LifeOS/install/hooks/BashWriteRelay.hook.ts
new file mode 100755
index 0000000000..8dc31b8b2c
--- /dev/null
+++ b/LifeOS/install/hooks/BashWriteRelay.hook.ts
@@ -0,0 +1,292 @@
+#!/usr/bin/env bun
+/**
+ * BashWriteRelay.hook.ts — replay the Write-shaped PostToolUse hooks for files a Bash call wrote.
+ * @version 1.1.0
+ * @event PostToolUse
+ * @matcher Bash
+ *
+ * WHY (#2079): `permissions.defaultMode: "auto"` tells the
+ * model to prefer Bash for file writes, and ISASync, CheckpointPerISC, ConfigEvalFire and
+ * SystemChangeSurface are registered on Write/Edit/MultiEdit only. An ISA written by heredoc
+ * therefore never reached work.json, the per-claim commit never fired, the eval suite never ran,
+ * and the ⚙️ SYSTEM line stayed silent. This hook closes the gap without touching the four:
+ * it watches Bash, finds the files that changed since its last run for this session, and replays
+ * each of the four with a synthesized Write payload carrying `file_path`.
+ *
+ * HOW: mtime narrows the candidates on a bounded set of watched roots (never by parsing the
+ * command), then a CONTENT HASH decides. A path is a change for this call only when its hash
+ * differs from the hash in a SHARED claims ledger, and claiming it updates that ledger.
+ * A path never seen before is recorded and not replayed, so pre-existing state is never
+ * attributed to whoever happens to run first. A change set larger than MAX_REPLAY (a checkout,
+ * a bulk generator) is logged and skipped rather than fanned out.
+ *
+ * WHY THE HASH AND THE SHARED LEDGER (over-reporting found in the first live day of the
+ * mtime-only 1.0.0). Two defects, both visible in one ⚙️ SYSTEM line that named files the
+ * session never touched:
+ *   1. **mtime is not content.** A backup commit, a generator that rewrites a file byte-identical,
+ *      or a checkout moves mtime with no edit, so `CLAUDE.md` and `LIFEOS/VERSION` were reported
+ *      as modified while git showed them clean. Same lesson as the archive's
+ *      "freshness is not proof of a write — verify content, not mtime".
+ *   2. **"changed since MY last scan" is not "changed BY me."** Baselines were per session, and
+ *      hooks run inside every headless `claude -p` child, so several live sessions each
+ *      attributed the memory loop's identity-file write to themselves within minutes.
+ * First claimer wins, exactly once, and everyone else sees the updated hash and stays silent.
+ *
+ * Output: one PostToolUse `additionalContext` carrying whatever the four produced, concatenated.
+ * Never blocks: every failure path exits 0 with no output.
+ */
+
+import { existsSync, mkdirSync, readFileSync, readdirSync, rmSync, statSync, writeFileSync } from "fs";
+import { createHash } from "crypto";
+import { join, resolve } from "path";
+import { homedir } from "os";
+import { isSubagentContext } from "./lib/subagent";
+
+// Anchor on the home directory like every sibling hook. LIFEOS_DIR names the LIFEOS
+// subfolder on a live install, so it is the wrong root for hook state.
+const PAI = join(homedir(), ".claude");
+const STATE_DIR = join(PAI, "LIFEOS", "MEMORY", "STATE", "bash-write-relay");
+const LOG = join(PAI, "LIFEOS", "MEMORY", "OBSERVABILITY", "bash-write-relay.jsonl");
+const MAX_REPLAY = 40;
+/** Shared across every session: path -> the content hash last attributed to somebody. */
+const CLAIMS = join(STATE_DIR, "claims.json");
+const CLAIMS_LOCK = join(STATE_DIR, "claims.lock");
+const LOCK_STALE_MS = 10_000;
+/** Above this, hashing costs more than the readout is worth; mtime alone decides. */
+const MAX_HASH_BYTES = 4 * 1024 * 1024;
+const HOOK_TIMEOUT_MS = 15_000;
+
+/** The four hooks the issue names. Order: registry first, so the ⚙️ line sees the ISA row. */
+const REPLAY_HOOKS = [
+  "ISASync.hook.ts",
+  "CheckpointPerISC.hook.ts",
+  "ConfigEvalFire.hook.ts",
+  "SystemChangeSurface.hook.ts",
+];
+
+/** Watched roots, relative to PAI. Files: exact. Dirs: walked. */
+const WATCHED_FILES = [
+  "CLAUDE.md",
+  "settings.json",
+  "settings.local.json",
+  "LIFEOS/LIFEOS_SYSTEM_PROMPT.md",
+  "LIFEOS/VERSION",
+  "LIFEOS/USER/PROJECTS.md",
+];
+const WATCHED_DIRS = [
+  "LIFEOS/ALGORITHM",
+  "LIFEOS/RULES",
+  "LIFEOS/TOOLS",
+  "hooks",
+  "skills",
+  "LIFEOS/USER/PRINCIPAL",
+  "LIFEOS/USER/DIGITAL_ASSISTANT",
+  "LIFEOS/USER/TELOS",
+  "LIFEOS/USER/CONFIG",
+  "LIFEOS/USER/PROJECTS",
+  "LIFEOS/MEMORY/WORK",
+];
+const SKIP_DIRS = new Set(["node_modules", ".git", "_retired", "logs", "dist", "build", ".cache", "backups"]);
+const SKIP_EXT = new Set([".jsonl", ".log", ".lock", ".html", ".png", ".jpg", ".jpeg", ".gif", ".pdf", ".zip", ".tar", ".gz"]);
+
+const SESSION_ID_RE = /^[A-Za-z0-9_-]{1,128}$/;
+
+interface Input {
+  session_id?: string;
+  tool_name?: string;
+  tool_input?: { command?: string };
+  [k: string]: unknown;
+}
+
+function readInput(): Input {
+  try { return JSON.parse(readFileSync(0, "utf-8")); } catch { return {}; }
+}
+
+function ext(p: string): string {
+  const i = p.lastIndexOf(".");
+  return i < 0 ? "" : p.slice(i).toLowerCase();
+}
+
+function walk(dir: string, sinceMs: number, out: string[], depth = 0): void {
+  if (depth > 8 || out.length > MAX_REPLAY * 4) return;
+  let entries: import("fs").Dirent[];
+  try { entries = readdirSync(dir, { withFileTypes: true }); } catch { return; }
+  for (const e of entries) {
+    if (e.isSymbolicLink()) continue;
+    const p = join(dir, e.name);
+    if (e.isDirectory()) {
+      if (SKIP_DIRS.has(e.name)) continue;
+      walk(p, sinceMs, out, depth + 1);
+    } else if (e.isFile()) {
+      if (SKIP_EXT.has(ext(e.name))) continue;
+      try { if (statSync(p).mtimeMs > sinceMs) out.push(p); } catch { /* vanished */ }
+    }
+  }
+}
+
+/** ISA paths the registry already knows, wherever they live on disk. */
+function registeredIsaPaths(): string[] {
+  try {
+    const raw = readFileSync(join(PAI, "LIFEOS", "MEMORY", "STATE", "work.json"), "utf-8");
+    const found: string[] = [];
+    const visit = (v: unknown): void => {
+      if (typeof v === "string") { if (v.endsWith("/ISA.md")) found.push(v.replace(/^~/, homedir())); }
+      else if (Array.isArray(v)) v.forEach(visit);
+      else if (v && typeof v === "object") Object.values(v as Record<string, unknown>).forEach(visit);
+    };
+    visit(JSON.parse(raw));
+    return Array.from(new Set(found));
+  } catch { return []; }
+}
+
+function changedSince(sinceMs: number): string[] {
+  const out: string[] = [];
+  for (const f of WATCHED_FILES) {
+    const p = join(PAI, f);
+    try { if (statSync(p).mtimeMs > sinceMs) out.push(p); } catch { /* absent */ }
+  }
+  for (const d of WATCHED_DIRS) walk(join(PAI, d), sinceMs, out);
+  for (const p of registeredIsaPaths()) {
+    try { if (statSync(p).mtimeMs > sinceMs) out.push(resolve(p)); } catch { /* absent */ }
+  }
+  return Array.from(new Set(out.map((p) => resolve(p))));
+}
+
+function hashFile(p: string): string | null {
+  try {
+    const st = statSync(p);
+    if (!st.isFile() || st.size > MAX_HASH_BYTES) return null;
+    return createHash("sha1").update(readFileSync(p)).digest("hex");
+  } catch { return null; }
+}
+
+/** mkdir is atomic on every filesystem we run on, so it is the lock. */
+function withClaimsLock<T>(fn: () => T): T | null {
+  for (let i = 0; i < 20; i++) {
+    try { mkdirSync(CLAIMS_LOCK); } catch {
+      try {
+        if (Date.now() - statSync(CLAIMS_LOCK).mtimeMs > LOCK_STALE_MS) rmSync(CLAIMS_LOCK, { recursive: true, force: true });
+      } catch { /* someone else cleaned it */ }
+      Bun.sleepSync(15);
+      continue;
+    }
+    try { return fn(); } finally { try { rmSync(CLAIMS_LOCK, { recursive: true, force: true }); } catch {} }
+  }
+  return null;   // could not take the lock: report nothing rather than double-report
+}
+
+type Claims = Record<string, { hash: string; at: number; session: string }>;
+
+/**
+ * Of `candidates`, the paths whose CONTENT changed since anyone last claimed them.
+ * Claiming is part of the same locked read-modify-write, so two concurrent sessions
+ * cannot both win the same write.
+ */
+function claimChanged(candidates: string[], sessionId: string): string[] {
+  const res = withClaimsLock<string[]>(() => {
+    let claims: Claims = {};
+    try { claims = JSON.parse(readFileSync(CLAIMS, "utf-8")) as Claims; } catch { /* first run */ }
+    const mine: string[] = [];
+    for (const p of candidates) {
+      const h = hashFile(p);
+      if (h === null) continue;                      // unreadable or too big: no claim, no report
+      const prior = claims[p];
+      if (!prior) {                                  // first sighting is a baseline, never a change
+        claims[p] = { hash: h, at: Date.now(), session: sessionId };
+        continue;
+      }
+      if (prior.hash === h) continue;                // mtime moved, bytes did not: nothing happened
+      // Real content change, and this call is the first to see it, so it owns the report.
+      // The row's `session` is only rewritten on a genuine claim — a passer-by overwriting it
+      // would make the ledger lie about who reported what.
+      claims[p] = { hash: h, at: Date.now(), session: sessionId };
+      mine.push(p);
+    }
+    // Bound the ledger: watched roots are small, but an ISA sweep can add rows.
+    const keys = Object.keys(claims);
+    if (keys.length > 4000) {
+      const keep = keys.sort((a, b) => (claims[b]!.at) - (claims[a]!.at)).slice(0, 3000);
+      const trimmed: Claims = {};
+      for (const k of keep) trimmed[k] = claims[k]!;
+      claims = trimmed;
+    }
+    try { mkdirSync(STATE_DIR, { recursive: true }); writeFileSync(CLAIMS, JSON.stringify(claims)); } catch {}
+    return mine;
+  });
+  return res ?? [];
+}
+
+function log(row: Record<string, unknown>): void {
+  try {
+    mkdirSync(join(PAI, "LIFEOS", "MEMORY", "OBSERVABILITY"), { recursive: true });
+    writeFileSync(LOG, JSON.stringify({ ts: new Date().toISOString(), ...row }) + "\n", { flag: "a" });
+  } catch { /* observability is best-effort */ }
+}
+
+function replay(input: Input, filePath: string): string[] {
+  const payload = JSON.stringify({
+    ...input,
+    tool_name: "Write",
+    tool_input: { file_path: filePath },
+    relayed_from: "Bash",
+  });
+  const contexts: string[] = [];
+  for (const hook of REPLAY_HOOKS) {
+    const hookPath = join(PAI, "hooks", hook);
+    if (!existsSync(hookPath)) continue;
+    try {
+      const r = Bun.spawnSync(["bun", hookPath], { stdin: Buffer.from(payload), stdout: "pipe", stderr: "ignore", timeout: HOOK_TIMEOUT_MS });
+      const text = r.stdout ? new TextDecoder().decode(r.stdout).trim() : "";
+      if (!text) continue;
+      for (const line of text.split("\n")) {
+        try {
+          const j = JSON.parse(line);
+          const ctx = j?.hookSpecificOutput?.additionalContext;
+          if (typeof ctx === "string" && ctx.trim()) contexts.push(ctx.trim());
+        } catch { /* non-JSON line, ignore */ }
+      }
+    } catch { /* one hook failing never stops the others */ }
+  }
+  return contexts;
+}
+
+function main(): void {
+  const input = readInput();
+  if ((input.tool_name || "") !== "Bash") return;
+  if (isSubagentContext(input)) return;
+  const sessionId = String(input.session_id || "");
+  if (!SESSION_ID_RE.test(sessionId)) return;
+
+  const now = Date.now();
+  const stateFile = join(STATE_DIR, `${sessionId}.json`);
+  let lastScanMs: number | null = null;
+  try { lastScanMs = JSON.parse(readFileSync(stateFile, "utf-8")).lastScanMs ?? null; } catch { /* first call */ }
+
+  // Always advance the baseline first, so a crash below cannot replay the same files twice.
+  try { mkdirSync(STATE_DIR, { recursive: true }); writeFileSync(stateFile, JSON.stringify({ lastScanMs: now })); } catch { /* fine */ }
+  if (lastScanMs === null) return; // first Bash call of the session: baseline only
+
+  const candidates = changedSince(lastScanMs);
+  if (candidates.length === 0) return;
+  if (candidates.length > MAX_REPLAY) {
+    log({ session: sessionId, skipped: candidates.length, reason: "bulk change set over MAX_REPLAY" });
+    return;
+  }
+
+  // mtime said "touched"; the hash says whether the bytes moved, and the shared ledger says
+  // whether this session is the one that gets to report it.
+  const changed = claimChanged(candidates, sessionId);
+  if (changed.length === 0) {
+    log({ session: sessionId, candidates: candidates.length, replayed: [], reason: "no content change this session could claim" });
+    return;
+  }
+
+  const contexts: string[] = [];
+  for (const f of changed) contexts.push(...replay(input, f));
+  log({ session: sessionId, replayed: changed.map((p) => p.replace(PAI + "/", "")), contexts: contexts.length });
+  if (contexts.length === 0) return;
+  console.log(JSON.stringify({ hookSpecificOutput: { hookEventName: "PostToolUse", additionalContext: contexts.join("\n\n") } }));
+}
+
+try { main(); } catch { /* never block */ }
+process.exit(0);
diff --git a/LifeOS/install/hooks/hooks.json b/LifeOS/install/hooks/hooks.json
index e9fc09f189..4886e0dc23 100644
--- a/LifeOS/install/hooks/hooks.json
+++ b/LifeOS/install/hooks/hooks.json
@@ -258,6 +258,11 @@
             "type": "command",
             "command": "$HOME/.claude/hooks/AtlasEventCapture.hook.ts",
             "timeout": 5
+          },
+          {
+            "type": "command",
+            "command": "$HOME/.claude/hooks/BashWriteRelay.hook.ts",
+            "timeout": 20
           }
         ]
       }