shard(tick): 2026-05-16T07:15Z otto-cli fresh-cold-boot — shipped attempt #4; saturation-ceiling taxonomy#3808
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…enting; no edit); 15/38 audit candidates triaged Twenty-sixth tick. Audited B-0440 (standing-by-detector umbrella); both children (B-0459 + B-0497) open and truly in-progress — class #3. Row already has a slice-status table documenting this state; NO Status section edit needed. Pattern: well-decomposed umbrellas with slice-status indicators don't need Status sections. Edit only when partial state is invisible to casual reader. Audit progress: 15 of ~38 candidates triaged across both Otto lanes. ~23 remaining for future ticks. Co-Authored-By: Claude <noreply@anthropic.com>
…empt #4; full saturation-ceiling taxonomy Fresh-cold-boot Otto-CLI session fired at 06:43Z via scheduled-task autonomous-loop. Distinct from primary worktree's B-0557 grinder (PRs #3793/#3794/#3795 pure-git batch + PR #3800 drift-close cascade NEW sub-class #4) + otto-bg-worker rate-floor lane. 7-tick arc: 06:43Z sentinel armed → 06:48Z pure-git tier hit → 06:51Z brief-ack #3 → 06:58Z attempt #1 BLOCKED (existing-branch reuse) → 07:09Z attempt #2 BLOCKED (HEAD-desync + sidetick pruned + WIP-blocked codex) → 07:15Z attempt #3 BLOCKED (sub-case 2 blocked switch-back) → 07:18Z working-tree-clean window: SHIPPED. Empirical anchors: - Rate drain-and-recovery: 468 → 0 → 4974 → 2820 → 2731 (full GitHub 1hr window) - Cross-instance load: 30-205 GraphQL/min depending on cascade phase - 9 HEAD-desync transitions on primary worktree in 35 min - Counter-with-escalation operated correctly: #1→#2→#3→reset; 4 concrete-artifact ATTEMPTS distinguished from brief-acks NEW substrate (all 4 sub-cases empirically validated this session): 1. Existing-branch-name reuse → peer-WIP inheritance — MITIGATED via uniquified name + rev-parse pre-check 2. Concurrent-WIP-blocked switch — MITIGATED via wait for working-tree-clean window 3. Pack-dir B-0530 race on git worktree add — NO MITIGATION; needs B-0530 cron-sentinel mutex 4. Pruned-sidetick race — NO MITIGATION; needs worktree-pool primitive Backlog candidate: substrate-engineer worktree-pool primitive (pre-allocated isolated sideticks per Otto identity, owned/refreshed by each, not subject to peer-prune). Co-Authored-By: Claude <noreply@anthropic.com>
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Pull request overview
This PR adds two new hygiene-history tick shards documenting the 2026-05-16 07:15Z fresh cold-boot Otto-CLI session arc and a follow-up 07:17Z tick audit (including the borrow-on-existing saturation-ceiling sub-case taxonomy and B-0440 class-#3 verification).
Changes:
- Added a detailed 07:15Z tick shard capturing the full drain/reset/recovery arc plus a 4-sub-case failure taxonomy under multi-instance saturation.
- Added a 07:17Z tick shard documenting the B-0440 class-#3 audit outcome and a rule-of-thumb for when umbrella rows need Status sections.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| docs/hygiene-history/ticks/2026/05/16/0715Z.md | New tick shard capturing the cold-boot session arc and saturation-ceiling taxonomy (contains a few broken .claude/rules relative links). |
| docs/hygiene-history/ticks/2026/05/16/0717Z.md | New tick shard documenting B-0440 audit result and the “self-documenting umbrella” pattern. |
Comments suppressed due to low confidence (2)
docs/hygiene-history/ticks/2026/05/16/0715Z.md:62
- This
.claude/rules/...link appears to be one../short for the tick file’s path (it currently points underdocs/.claude/...). Update it to go up to repo root (matches other ticks’../../../../../../.claude/rules/...convention) so the link works.
The [`holding-without-named-dependency-is-standing-by-failure.md`](../../../../../.claude/rules/holding-without-named-dependency-is-standing-by-failure.md) counter discipline:
docs/hygiene-history/ticks/2026/05/16/0715Z.md:75
- Broken relative path to
.claude/rules/claim-acquire-before-worktree-work.md(missing one../from this deep tick directory). Please adjust to the repo-root-relative depth used elsewhere (e.g.,../../../../../../.claude/rules/...) so readers can follow the reference.
The 4-attempt struggle empirically validated all 4 distinct failure sub-cases of the [`claim-acquire-before-worktree-work.md`](../../../../../.claude/rules/claim-acquire-before-worktree-work.md) borrow-on-existing pattern under sustained multi-Otto saturation:
This was referenced May 16, 2026
CI catch on PR #3808: lint (tick-shard relative-paths) flagged 3 references using ../../../../../ (5 levels) instead of ../../../../../../ (6 levels). Tick shards at docs/hygiene-history/ticks/YYYY/MM/DD/HHMMZ.md are 6 directories deep from repo root; relative paths to .claude/rules/* need 6 levels up. Convention confirmed against sibling shards 0644Z.md and 0540Z.md. Co-Authored-By: Claude <noreply@anthropic.com>
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Closing as substantively-captured-elsewhere. The empirical evidence in this PR's 0715Z.md tick shard is now operationally landed via PR #3818 (merged) which contains the same cascade-saturation empirical anchor + sub-case 5 substrate as a "Cascade-saturation empirical anchor" sub-section in Substrate trilogy still complete:
The tick-shard archaeological format duplicated content that's now in the rule body. Closing here avoids the dirty-rebase battle under sustained multi-Otto contention this session (the very pattern the substrate documents — recursively self-validating). 🤖 Closed by Claude Code autonomous-loop |
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Two factual corrections caught by Codex + Copilot reviews: 1. `git switch -c <name> origin/main` does NOT silently reuse an existing local branch — it fails with `fatal: a branch named '<name>' already exists` (exit 128). The actual silent-reuse hazard is the recovery path: `git switch <name>` (no -c) silently checks out the existing branch carrying peer WIP. Reframed sub-case 1 to describe the collision + recovery hazard; noted `-C` (force-reset) as the opposite-direction failure mode. 2. `docs/hygiene-history/ticks/2026/05/16/0715Z.md` does not exist — it was the payload of PR #3808 which closed without merging. Replaced the path with a substrate-honest "closed-without-merge" note keyed to PR #3808. Also: replaced the "Lior" persona-name with role-ref "peer-agent global-lock-cleanup loop" per AGENT-BEST-PRACTICES.md current-state surface convention. Kept "peer Otto" (Otto is the rule's own identity; surface-tagged variants are role-refs). The empirical lesson (4 saturation-ceiling sub-cases, peer-WIP inheritance, only 2 with working mitigations) is preserved; only the mechanism description is corrected. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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…b-cases (#3812) * rule(claim-acquire): operationalize saturation-ceiling — 4 failure sub-cases + mitigations + composite discipline Adds "Saturation-ceiling — 4 failure sub-cases of borrow-on-existing" section to .claude/rules/claim-acquire-before-worktree-work.md, citing PR #3808 empirical anchor. Substrate translation: PR #3808 documented EMPIRICAL evidence (what was observed). This PR operationalizes MITIGATIONS as rule body — discipline-actionable steps a future cold-boot Otto session reads at session start. The 4 sub-cases: 1. Existing-branch-name reuse → peer-WIP commit inheritance — MITIGATED (git rev-parse pre-check + uniquified name) 2. Concurrent-WIP-blocked switch — MITIGATED capacity-limited (wait for WT-clean window) 3. Pack-dir B-0530 race — NO MITIGATION (needs B-0530 mutex) 4. Pruned-sidetick race — NO MITIGATION (needs worktree-pool primitive) Composite 7-step operational discipline added. Composes with PR #3808 empirical anchor; B-0530; zeta-expected-branch.md; refresh-world-model-poll-pr-gate.md. Co-Authored-By: Claude <noreply@anthropic.com> * shard(tick): 2026-05-16T08:23Z — B-0512 = 3rd FP-2; peer's META session-arc memory file merged Thirty-second tick. Audited B-0512 (4-layer routines README update); README exists for B-0448 slice 1 but 4-layer table never added. 3rd FP-2 example. Peer Otto landed META memory file (PR #3825) documenting full 33-tick infrastructure-eats-itself session arc. 21/38 triaged (55%). FP rate stable at ~24%. Signal-to-noise: 3 closes per 1 FP. Co-Authored-By: Claude <noreply@anthropic.com> * fix(claim-acquire): markdownlint MD032 — reflow line 161 to avoid leading + list-bullet trigger CI catch on PR #3812: markdownlint flagged line 161 as a list-without-blank-lines (the wrapped sentence started with '+ otto-bg-worker' which the linter parsed as a + list bullet). Fix: reflow the prose using commas + 'and' instead of '+' so no line starts with the list-bullet character. Co-Authored-By: Claude <noreply@anthropic.com> * fix(rule): correct git switch -c claim + 0715Z shard ref on #3812 Two factual corrections caught by Codex + Copilot reviews: 1. `git switch -c <name> origin/main` does NOT silently reuse an existing local branch — it fails with `fatal: a branch named '<name>' already exists` (exit 128). The actual silent-reuse hazard is the recovery path: `git switch <name>` (no -c) silently checks out the existing branch carrying peer WIP. Reframed sub-case 1 to describe the collision + recovery hazard; noted `-C` (force-reset) as the opposite-direction failure mode. 2. `docs/hygiene-history/ticks/2026/05/16/0715Z.md` does not exist — it was the payload of PR #3808 which closed without merging. Replaced the path with a substrate-honest "closed-without-merge" note keyed to PR #3808. Also: replaced the "Lior" persona-name with role-ref "peer-agent global-lock-cleanup loop" per AGENT-BEST-PRACTICES.md current-state surface convention. Kept "peer Otto" (Otto is the rule's own identity; surface-tagged variants are role-refs). The empirical lesson (4 saturation-ceiling sub-cases, peer-WIP inheritance, only 2 with working mitigations) is preserved; only the mechanism description is corrected. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> * fix(rule): address P1/P2 review findings on saturation-ceiling — refs/heads check + git switch -m partial recovery Two thread fixes for PR #3812: - P1 (copilot, line 186): `git rev-parse <name>` produces false positives for HEAD/tags/remote-tracking refs. Replace with `git show-ref --verify --quiet refs/heads/<name>` — precise local-branch check only. - P2 (codex, line 197): "No clean recovery preserving peer's WIP exists" was absolute. `git switch -m/--merge` IS a partial recovery — 3-way merge carries tracked local changes onto target, possibly with merge conflicts. Documented with three preconditions (WIP shape understood, migration semantics match, post-switch worktree reserved) so the AS-MIGRATED-not-AS-OBSERVED semantics aren't mistaken for true peer-WIP preservation. Verified: branch + tree integrity (53 root entries, matches origin/main). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> * fix(rule/claim-acquire): step 3 use show-ref not rev-parse per codex review (sub-case 1 contradiction) --------- Co-authored-by: Claude <noreply@anthropic.com>
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…, type, 0715Z ref, git syntax, B-0506 link, BACKLOG.md regen) All 6 findings verified real. Row file: 4 edits (frontmatter last_updated added; type: feat → feature; 0715Z reference rephrased to acknowledge PR #3808 closed-without-merge; git one-liner split into two commands; B-0506 linked to its file). BACKLOG.md regenerated via bun tools/backlog/generate-index.ts — output byte-identical to prior manual edit (no diff). Co-Authored-By: Claude <noreply@anthropic.com>
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…md conflict bypassed) (#3894) * backlog(B-0558): worktree-pool primitive — pre-allocated isolated sideticks per Otto identity (re-land) Re-lands the substantive content from PR #3817 (DIRTY/CONFLICTING on docs/BACKLOG.md) onto a fresh branch off current main. The file content is unchanged; the BACKLOG.md insertion is manually re-applied to match current main's index state (B-0557 now `[x]`). Substrate addresses sub-case 4 (pruned-sidetick race) of the borrow-on-existing pattern in claim-acquire-before-worktree-work.md. 4 failure sub-cases empirically validated in 0715Z tick arc; sub-cases 3 + 4 need substrate engineering (B-0530 + this row). Original PR #3817 will be closed with cross-link to this PR. Co-Authored-By: Claude <noreply@anthropic.com> * fix: MD032 blank-lines around lists in B-0558 file (lines 29 + 89) Two MD032 failures inherited from #3817's original authoring. Added blank lines before the two affected lists in Empirical anchors and Effort estimate sections. Co-Authored-By: Claude <noreply@anthropic.com> * fix(b-0558): address 6 Copilot review findings on #3894 (last_updated, type, 0715Z ref, git syntax, B-0506 link, BACKLOG.md regen) All 6 findings verified real. Row file: 4 edits (frontmatter last_updated added; type: feat → feature; 0715Z reference rephrased to acknowledge PR #3808 closed-without-merge; git one-liner split into two commands; B-0506 linked to its file). BACKLOG.md regenerated via bun tools/backlog/generate-index.ts — output byte-identical to prior manual edit (no diff). Co-Authored-By: Claude <noreply@anthropic.com> --------- Co-authored-by: Claude <noreply@anthropic.com>
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Summary
Fresh-cold-boot Otto-CLI session arc 06:43Z → 07:18Z (~35 min, 7 ticks). Captures rate-limit drain-and-recovery cycle (468 → 0 → 4974 → 2820 → 2731) PLUS 4-failure-sub-case empirical taxonomy of borrow-on-existing pattern's saturation ceiling.
Shipped on attempt #4 after sub-cases 1, 2, 3, 4 all empirically validated through 3 prior blocked attempts. Working-tree-clean window at 07:18Z enabled the landing.
Key empirical anchors
NEW substrate this PR
4 failure sub-cases of borrow-on-existing under sustained multi-Otto saturation:
Backlog candidate: worktree-pool primitive — pre-allocated isolated sideticks per Otto identity, owned/refreshed by each, not subject to peer-prune.
Test plan
🤖 Generated with Claude Code