260507_session_brian_hook_hardening
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SESSION TRANSCRIPT — Brian hook hardening + revenue pivot
Date: 2026-05-07 (Beirut)
Host: ubuntu-8gb-hel1-1 (Hetzner)
Session start: ~22:00 Beirut (post-/clear)
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CONTEXT AT SESSION START
------------------------
Just after /clear. Pre-clear preservation note carried 7 followup items:
(1) Ed25519 migration steps 1-4 APPLIED; HMAC+Ed25519 dual-sign window
active, decommission HMAC ~1 week.
(2) Stale Brian session PID 2290184 alive since May 5 firing test
fixtures — investigate.
(3) Sweep 5 sibling Stop-hooks for COMMS-default alerts:
brian-presend-evidence-gate, brian-done-plus-guard,
brian-flat-voice-guard, brian-proactive-stop-guard,
brian-action-language-guard.
(4) brian_validator.py:303 sparse-args command_zero_exit crash → clean
policy-fail.
(5) Defense-in-depth: hard-fail hook on BRIAN_TEST_MARKER files in prod
overrides dir.
(6) Freepik fallback for blog hero images half-installed.
(7) Patterns: ALERT_RELAY_RE guard for any prompt-content hook;
test-vs-prod env isolation flags OVERRIDE_AUDIT_DIR/NO_ALERT/MEMORY_FILE;
HARD rule errors→LOGS never COMMS (locked 2026-04-17).
Jonah opened the session by running:
echo '{"transcript_path":"/dev/null","stop_hook_active":false}' \
| /root/.claude/hooks/brian-evidence-gate-sandboxed.sh
rc=0
That rc=0 closed item #4 (sparse-args path now exits clean).
TURN 1 — "now what?"
--------------------
Brian: confirmed item #4 closed; proposed investigating PID 2290184 next.
Inspected PID 2290184:
/root/.local/bin/claude --system-prompt You are Brian. Jonah Tebaa's partner...
ETIME=2-00:41 STAT=Sl+ TTY=pts/1 PPID=2289512
Conclusion: NOT a stale runaway. It's a live interactive Brian Claude CLI
sitting on pts/1 since May 5 (lined up with the Codex behavioral-enforcement
work). Foreground, sleeping, no CPU. The earlier preservation note's
"firing test fixtures" framing was wrong — it's just a detached terminal.
Reclassified item #2: not stale, leave-or-kill is Jonah's call.
TURN 2 — "yes" (proceed with #3 sweep)
--------------------------------------
Located all 5 Stop-hooks at /root/.claude/hooks/. Greps for:
COMMS / LOGS / jonah_claude_bot / brian_system_logs_bot / alert_relay /
tg_send / send_telegram / hermes_send / level= / chat_id / TELEGRAM_
Result: ZERO matches across all five.
Confirmed by import grep:
All 5 hooks import only json/sys/re/os/pathlib/datetime.
No requests, urllib, or subprocess module imports anywhere.
Pure-local stdin-validators that block via stderr + nonzero exit.
Verdict: clean. No COMMS-vs-LOGS misroute possible from inside these 5.
Item #3 closed.
PROACTIVE RISK SURFACED: with no outbound alerting, a CRASHED hook
silently passes (Stop hooks exit-2 to block, exit-0 or any error to
allow). If one of the five throws on malformed stdin, the trait stops
being enforced and nobody knows. Same failure mode that bit
brian_validator.py:303. Recommended adding a try/except wrapper that
catches exceptions and logs to the rotating crash file referenced in
feedback_hook_crash_pattern.md.
TURN 3 — "wanna push them all? or not recommended?"
---------------------------------------------------
Brian's honest take per remaining queue:
#1 Ed25519 HMAC decommission → DEFER. Window is May 14; pulling early
risks breaking signature verification.
#5 BRIAN_TEST_MARKER hard-fail → PUSH NOW. Small, additive, blast
radius zero.
#6 Freepik fallback → CHECK FIRST. Half-installed, likely blocked on
creds or quota.
#7 patterns docs → LOW VALUE vs revenue cost. Defer.
Hook-crash wrapper (the proactive risk) → PUSH NOW. Higher leverage
than #5/#6/#7 combined; protects every other hook.
Bigger picture flagged: all of this is infra polish. CORE memory says
"notice when you drift back into infra-polish mode; flag yourself and
pivot to revenue work". Recommended bundle-then-pivot:
1. Push #5 + hook-crash wrapper as 20-min defense-in-depth bundle
2. Stop the infra sweep
3. Pivot to revenue — /agency post status, GEO hour, lead-form
probes, signal sweep
TURN 4 — "do what you know is best. also do not forget to test
with codex and, if available, jules and gemini."
-------------------------------------------------------------
PHASE A — Discovery (parallel):
✓ Prod overrides dir = /opt/agent/data/agent_runtime/overrides/
Already had a leaked test fixture: test_t1_1778135072.jsonl
(from May 7 06:24). Real threat existed at the time of the work.
✓ Crash convention: _brian_hook_crash.record_crash(name, exc) module
at /root/.claude/hooks/_brian_hook_crash.py. Fail-allow pattern,
threshold 3/hour → breach marker → alert.
✓ Reviewer CLIs:
codex → /usr/bin/codex (sync, exec subcommand)
jules → /usr/bin/jules (async, repo-bound — not fit)
gemini → /usr/local/bin/gemini (sync, -p prompt)
Round-table = codex + gemini. Jules skipped (wrong fit, not failure).
PHASE B — Backup before edit:
/opt/agent/data/agent_runtime/_hook_backups/20260507T191008Z_pre_wrapper/
(6 hooks copied with mode preserved)
PHASE C — Design doc written, dispatched to codex + gemini in parallel.
Doc: /tmp/brian_hook_hardening_design.md
Both ran headless; gemini first attempt SIGTERM'd on --approval-mode
plan (interactive); retried with -y (yolo headless), succeeded.
ROUND-TABLE VERDICTS:
CODEX = GO-WITH-CHANGES
GEMINI = GO-WITH-CHANGES
Convergent answers (both reviewers):
Q1 exit code: keep 0; alert + cleanup, never block prompts
Q3 SystemExit: re-raise as written
Q4 performance: acceptable
Q5 race: ignore — goal is leak detection, not atomic enforce
Codex unique catches:
- sys.path.insert idempotency guard (no duplicate entries)
- Narrow detector except to OSError, not blanket-pass (preserves
real bug visibility)
- shlex.quote filenames in error message; remove auto rm -f
(filename injection risk)
- Cap directory scan at 1000 entries
- Write a first-occurrence breach marker DIRECTLY (do not wait
for 3/hour aggregation — single leak might never trigger)
- Add prefixes pytest_, fixture_, _test
Gemini unique catches:
- Use os.scandir() instead of pathlib.iterdir() (avoids stat)
- Filter to .jsonl only + "MARKER" substring (tighter false-positive)
- Avoid _test prefix (collision risk with future legit files)
- Verify imports + ensure sys.path insert happens before import in
every branch
Conflict resolution:
_test prefix → DROPPED (gemini conservative wins; legit files in
OVERRIDES_ROOT are UUID-named, no collision risk
going either way, but conservative is safer)
All other recommendations → MERGED
PHASE D — Applied edits:
1) Wrapper appended to 5 hooks:
brian-presend-evidence-gate.py
brian-done-plus-guard.py
brian-flat-voice-guard.py
brian-proactive-stop-guard.py
brian-action-language-guard.py
Pattern:
if __name__ == "__main__":
try:
main()
except SystemExit:
raise
except Exception as _e:
try:
_HD = "/root/.claude/hooks"
if _HD not in sys.path:
sys.path.insert(0, _HD)
from _brian_hook_crash import record_crash
record_crash("brian-<hookname>", _e)
except Exception:
pass
sys.exit(0)
2) Pollution detector added to brian-override-audit.py:
- shlex import added
- _detect_pollution() helper: os.scandir, capped 1000,
.jsonl-only, prefix-or-MARKER match
- main() runs detect first; on pollution: stderr msg with
shlex.quote'd names + write _pollution_breach.json
first-occurrence marker + record_crash + sys.exit(0)
PHASE E — Smoke tests (6 cases):
TEST 1 valid Stop-hook input → 5/5 hooks rc=0 ✓
TEST 2 empty + junk stdin → 5/5 hooks rc=0 (no crash) ✓
TEST 4 EXISTING leak detected →
rc=0
stderr: PROD OVERRIDES DIR POLLUTED — 1 test-fixture file(s)
in /opt/agent/data/agent_runtime/overrides:
test_t1_1778135072.jsonl. Clean before override audit
resumes.
_pollution_breach.json written ✓
TEST 5 cleanup → re-run → rc=0, no pollution stderr,
normal session jsonl created ✓
TEST 6 synthetic BRIAN_TEST_MARKER plant → detected, rc=0,
marker re-written ✓
Result: 6/6 PASS.
PHASE F — Quarantine + cleanup:
Original leaked file (test_t1_1778135072.jsonl) moved from /tmp to
/opt/agent/data/agent_runtime/_hook_backups/20260507T191008Z_pre_wrapper/
for forensics. Smoketest artifact (smoketest123.jsonl) removed.
OVERRIDES_ROOT now clean.
PHASE G — Revenue pivot:
✓ GEO hour armed for 02:00 Beirut tonight (cron 0 23 * * * UTC,
hard rule confirmed).
✓ brianserves.me/api/contact → 200 (X-Probe header working,
no Jonah ring per feedback_no_probe_alerts_for_lead_form.md).
⚠ jonahtebaa.com → 403 on /api/contact, 405 on /contact and /lead.
Real endpoint moved or Cloudflare-gated. Worth fixing — primary
inbound surface.
❓ webspot.me + pgpro.me → no response on standard paths. Endpoints
unknown to Brian.
❓ /agency daily log shows generic queue routing, no per-platform
LI/IG/FB success/fail visibility for today's post.
❓ Signal sweep storage location not found in social_signals/
or 20crm/ dirs.
PROACTIVE RISK: visibility gap on /agency daily post is the bigger
issue — if today's cross-post silently failed, the "no silent skip"
hard rule is violated and we wouldn't know.
TURN 5 — "tell me what we have done so far today"
-------------------------------------------------
Pulled today's full activity record. Earlier today (before /clear):
• Evidence-gate Day 5-3 — Ed25519 migration steps 1-4 applied.
HMAC + Ed25519 dual-sign window active. 99/99 tests green.
Decommission scheduled ~May 14. Touched: rotate_evidence_gate_hmac.py,
setup_validator_uid_separation.sh, brian_validator.py,
evidence_gate_calibrate.py.
• Created monitor_service_status skill — proactive systemd watcher.
• AUDIT_FINDINGS.md + d1_review postmortems at
/opt/agent/data/postmortems/260507_*.
• Hook-crash threshold + calibration-drift tracked in:
feedback_hook_crash_pattern.md, feedback_hook_crash_test-hook.md,
feedback_hook_crash_target-bs-test.md, feedback_calibration_drift.md.
• Pre-/clear preservation captured the 7-item followup queue.
This session (since ~22:00 Beirut):
• Item #4 sparse-args crash — closed (rc=0 verified).
• Item #2 PID 2290184 — reclassified as live interactive session.
• Item #3 5-hook COMMS sweep — clean (no outbound paths exist).
• Item #5 + hook-crash wrapper bundle — round-tabled, merged,
applied, 6/6 smoke tests pass, original May 5 leak quarantined.
• Revenue pivot — partial; GEO armed, brianserves working,
jonahtebaa.com lead form broken, webspot/pgpro unknown,
/agency log opaque, signal sweep not found.
STILL OPEN (held per Jonah's "hold this plan" instruction)
----------------------------------------------------------
- Lead-form endpoint discovery on jonahtebaa.com / webspot.me / pgpro.me
- Today's /agency LI+FB+IG publish receipt trace
- Item #1 Ed25519 HMAC decommission (~May 14, scheduled — not due)
- Item #6 Freepik blog-hero fallback finish (half-installed)
- Item #7 patterns docs consolidation
FILES TOUCHED THIS SESSION
--------------------------
/root/.claude/hooks/brian-presend-evidence-gate.py (wrapper added)
/root/.claude/hooks/brian-done-plus-guard.py (wrapper added)
/root/.claude/hooks/brian-flat-voice-guard.py (wrapper added)
/root/.claude/hooks/brian-proactive-stop-guard.py (wrapper added)
/root/.claude/hooks/brian-action-language-guard.py (wrapper added)
/root/.claude/hooks/brian-override-audit.py (pollution detector added)
Backup:
/opt/agent/data/agent_runtime/_hook_backups/20260507T191008Z_pre_wrapper/
brian-action-language-guard.py
brian-done-plus-guard.py
brian-flat-voice-guard.py
brian-override-audit.py
brian-presend-evidence-gate.py
brian-proactive-stop-guard.py
test_t1_quarantined.jsonl (the original May 5 leak)
Working files:
/tmp/brian_hook_hardening_design.md (design doc sent to reviewers)
/tmp/brian_review_prompt.txt (review prompt template)
/tmp/brian_review_full.txt (combined doc + prompt)
/tmp/codex_review.txt (codex verdict + recommendations)
/tmp/gemini_review.txt (gemini verdict + recommendations)
VERIFICATION LEDGER
-------------------
[✓] python3 ast.parse on all 6 modified files → no syntax errors
[✓] 5 wrapped hooks rc=0 on valid Stop-hook payload
[✓] 5 wrapped hooks rc=0 on empty stdin
[✓] 5 wrapped hooks rc=0 on non-JSON stdin
[✓] override-audit detects pre-existing real leak, writes breach marker
[✓] override-audit resumes normal operation after leak removed
[✓] override-audit detects synthetic BRIAN_TEST_MARKER plant
[✓] OVERRIDES_ROOT clean at end of session
[✓] Original leak preserved in backup dir for forensics
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END OF SESSION TRANSCRIPT
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