diff --git a/docs/hygiene-history/loop-tick-history.md b/docs/hygiene-history/loop-tick-history.md
index e855fb2c..d4de4e69 100644
--- a/docs/hygiene-history/loop-tick-history.md
+++ b/docs/hygiene-history/loop-tick-history.md
@@ -282,3 +282,4 @@ fire.
 | 2026-04-26T13:12:12Z (autonomous-loop tick — subagent drained 14 #592 threads while #592 + #589 BOTH MERGED on main; all subagent fixes landed in the squash merge cleanly) | opus-4-7 / session continuation | f38fa487 | **Two-PR-merged-during-drain tick.** (1) **#592 MERGED on main** (squash 1c1bd95): AceHack→LFG sync batch-1 — 17 missing files brought to LFG, audit doc landed, Otto-347 discipline shipped. The squash merge incorporated the subagent's bash-3.2-portable while-read loop replacing mapfile, api_warnings counter, numeric-flag validation, JSON-compaction abort, and name-attribution scrub on docs and skill body. The drain dispatched 14 threads cleanly without supersede-discard (Otto-347 working at-scale: 2 outdated-verified-vs-c29fd41 + 5 doc-fixes + 7 shell-fixes + 0 kept-open). (2) **#589 MERGED on main** (squash d488d0f): Phase 4 substrate-as-mechanism (docs/operations/branch-protection.md + 4 JSON snapshots) closing the live-lock hallucination class structurally — agents reading the substrate during normal repo navigation now encounter the actual gates (CI checks + thread resolution + Copilot review on push) instead of inheriting training-data review-approval-required default. Mechanism-over-vigilance per Otto-341 demonstrated end-to-end. (3) **#595 markdownlint pipe-in-code-span scrub** (push b3a7397): row 275 had remaining unescaped pipes in jq-notation code spans; comprehensive bulk replace eliminated all of them by rewriting to prose. Cron `f38fa487` armed. | (consecutive ticks — sub-tick after 13:00Z) | **Observation — parallel subagent dispatch + auto-merge composed cleanly**: subagent drained 14 threads in one shot (~7 minute task) while CI completed and #592 auto-merged. The squash-merge picked up all subagent commits in the right order. This is the parallel-work pattern from Otto-226 working at scale: subagent does the bounded fix, main agent does coordination, auto-merge ships when CI clears. **Observation — Phase 4 substrate-as-mechanism is now main-resident**: future-Otto reading docs/operations/branch-protection.md will encounter the live-lock-hallucination correction structurally. Per Otto-341 mechanism-over-vigilance, this is the structural fix that memory-only reminders couldn't hold. The hallucination class doesn't disappear from training data, but the substrate now overrides it on Zeta navigation. **Observation — sync option-(c) batch-1 fully landed**: Otto-329 Phase 1 → … → Phase 8 progresses. Batches 2..N still pending Otto-347 verify dispatch (the 38 EXISTS-MERGE commits enumerated in the now-landed audit doc). Future-Otto can resume from substrate (audit doc on main; verify-discipline memory landed; 17 reference files visible). **Observation — Otto-347 asymmetric-cost discipline working at scale**: 14-thread subagent drain returned ZERO supersede-discard verdicts. Every classification was either real-fix or accurately-superseded-by-prior-commit. The discipline prevents the "bulk close as superseded" failure mode that bit #132 earlier this session. |
 | 2026-04-26T13:25:43Z (autonomous-loop tick — Aurora Round-3+ 5-share cross-AI chain absorbed verbatim into single courier-ferry doc; integration deferred to task #286 per Otto-275 log-don't-implement) | opus-4-7 / session continuation | f38fa487 | **Capture-everything tick on Round-3+ avalanche.** Five Round-3+ shares from the human maintainer in one conversation turn (Amara x 3 + Gemini Deep Think x 2): anchor-stack expansion (Minka EP ancestor + RMP nervous-system + Probabilistic Circuits hard-gates), full 23-section deep technical rewrite, 5 hidden speed traps with patches, Blade-vs-Brain performance doctrine (Data Plane / Control Plane separation with TigerBeetle/FoundationDB/Differential-Dataflow anchor lineage), and Amara review-of-review with 3 corrections. Volume exceeded single-tick integration capacity. Per Otto-220 don't-lose-substrate plus Otto-275 log-don't-implement: captured all five shares VERBATIM in single absorb doc with attribution per Otto-238 retractability plus Otto-279 history-surface plus GOVERNANCE section-33 archive header. Reverted partial section-6 prose edits (subsumed). Kept binding refinements: graph weight renamed W_t to omega_t in N_t tuple; M_active formalized as weighted multiset with explicit detector capacity K. PR #602 opened. Task #286 filed. Cron `f38fa487` armed. | (sub-tick after 13:12Z) | **Observation — capture-everything discipline at avalanche scale**: 5 shares roughly 700 lines in one turn. Right move was NOT inline integration (would patchwork or drop attribution); right move was verbatim absorb plus task-file integration. Otto-275 log-don't-implement working at scale. **Observation — multi-harness vision proof-of-concept compounding**: five rounds Amara + Gemini DT alternating substantive math/architecture refinement on same converged-doc state with human courier. Each pass added concrete corrections previous pass missed. Manual cross-AI courier IS what formal multi-harness automation could replace. **Observation — Round-3 substrate reaches database-engineering threshold**: prior rounds were math substrate; this round shifts to systems-engineering substrate (TigerBeetle/FoundationDB anchor lineage, no-unbounded-work-on-commit-path, FeatureSet_Zeta scoping, SIMD-able diagonal Mahalanobis). Framework crossed from theoretical-AI-systems-design to bare-metal-database-engineering per Gemini's verdict. Task #286 will land as substrate-as-mechanism per Otto-341. |
 | 2026-04-26T13:28:33Z (autonomous-loop tick — rebase-replace tick after force-push blocked by safety discipline; closed-and-reopened pattern preserves Otto-238 retractability without destructive history rewrite) | opus-4-7 / session continuation | f38fa487 | **Operational-discipline tick.** Earlier 13:25Z tick PR #603 went DIRTY when #601 merged (parallel append-only file conflict). Tried to rebase + force-push; force-push blocked per safety discipline (per memory `feedback_blocked_status_is_not_review_gating_check_status_checks_failure_first_otto_live_lock_2026_04_26.md`). Took the cleaner path: aborted rebase, closed #603 with explanation comment, opened fresh branch off current main with the 13:25Z row appended chronologically (and this 13:28Z self-reflective row added for completeness). Cron `f38fa487` armed. | (rebase-replace pattern; supersedes #603) | **Observation — force-push restriction caught a discipline-failure mode I would have rationalized**: my first instinct was "rebase + force-push to fix the conflict" which is the textbook fast path for tick-history append conflicts. The safety hook blocked correctly: force-pushing tick-history branches risks destroying parallel-tick rows that haven't yet merged elsewhere. The cleaner pattern (close-and-reopen) preserves all rows and all PR history. Discipline-via-mechanism per Otto-341 working again. **Observation — append-only-file conflict is structural for tick-history when ticks fire in parallel**: every parallel tick that opens its own branch off main will conflict with siblings on the same final line. The right discipline is sequential-append (wait for parent to merge before branching) OR parallel-rebase-merge (sibling waits, rebases when parent merges). My session has been firing many parallel ticks in quick succession — natural that some will hit this. **Observation — close-and-reopen is the safe rebase substitute**: identical content in a new PR avoids force-push entirely, preserves audit trail (closed PR + comment explaining), and is mechanically simple. Future-Otto can use this pattern whenever a tick-history PR goes DIRTY from sibling merges. |
+| 2026-04-26T13:41:52Z (autonomous-loop tick — task #276 found gated on B-0032 threat-model; #602 MD032 fixed via mechanical blank-line script; substrate-primitive-build held pending other priorities) | opus-4-7 / session continuation | f38fa487 | **Investigation + minor fix tick.** (1) **Task #276 (direct-to-main tick-history) is GATED on B-0032 heartbeat-file-integrity threat-model review by Aminata** — confirmed via `docs/backlog/P2/B-0032-*.md` cross-reference. Direct-to-main writes from autonomous agents to a load-bearing-for-AI-cognition file IS an attack surface that needs threat-model first. So implementing #276 today would skip the discipline. Filed as understanding, not work. (2) **PR #602 MD032 lint fail fixed** (push 5cecc81): the absorb doc's verbatim Amara math sections had inline bulleted lists (typed state spaces, factor-graph variables, network components) without surrounding blank lines. Auto-fix python script: insert blank line before list-start when prev was non-blank-non-list, blank line after list-end when next was non-blank-non-list. 15 insertions; no content edits, Amara/Gemini verbatim preserved. (3) **Verified the 3 substrate-primitive lints I noted earlier do NOT exist**: `check-jq-add-default.sh`, `check-tick-history-codespan-pipes.sh`, `check-branch-protection-snapshot-stale.sh` — all not in `tools/hygiene/`. Building them is real work; held pending higher-priority items. Cron `f38fa487` armed. | (#602 MD032 fix tick) | **Observation — verify-substrate-exists discipline composes both directions**: last tick I almost wasted a tick implementing append-tick-history-row.sh which already existed. This tick I verified the OTHER 3 candidate primitives don't exist before deciding whether to build. Same discipline applied symmetrically. **Observation — task gating preserves discipline through pending-state**: #276 has been "pending" all session and I almost picked it as the tick action this tick — but B-0032 cross-reference revealed it's gated on Aminata threat-model review I haven't done. The pending status was hiding a dependency. Future-Otto: when picking a pending task as bounded tick action, check the task description AND any docs/backlog/ row referencing it for gates/dependencies before starting. **Observation — auto-fix scripts for markdownlint patterns are themselves substrate-primitive territory**: this tick I wrote a one-shot python blank-line-around-lists fixer; doing it again would mean writing a similar one-shot for the next MD032 case. The substrate-primitive that ships would be `tools/hygiene/fix-markdown-md032-blanks.py` (sibling to existing `fix-markdown-md032-md026.py` which I haven't checked exists yet — verify-substrate-exists discipline applies). |