shard(2026-05-24/1407Z): dotgit 14th-observation (0 procs first time in 27h49min) + repo-restoration confirmed

[AceHack]

Summary

• Sentinel 73be4ed6 re-armed at cold-boot (catch-43 fire — prior 234f5d96 expired with 1333Z session, ~35min gap)
• 14th observation in dotgit-saturation rolling arc since 2026-05-23T10:18Z: 0 stuck git plumbing procs at 14:07Z — first 0-reading in 27h49min
• Three hypotheses preserved per default-to-both.md: A) genuine multi-day cycle clearing, B) maintainer-side cleanup at ~12:21Z eliminated contention surface, C) 12:26Z user-scope "repo vanished" reading was transient cleanup snapshot (current state: repo intact, restored)

Operational

• GraphQL Normal (4182/5000); REST 4854/5000
• Isolated worktree per shared-.git/ discipline; canary pass (parent 55 / head 55)
• No restoration attempt (out of autonomous-loop scope per 12:26Z memo)
• Future-Otto guidance: 0-readings do NOT prove permanent recovery; need 2+ subsequent low-readings at multi-hour intervals

Test plan

• worktree post-creation guard (HEAD valid, status 0, ls-tree 55)
• commit canary (head_tree == parent_tree == 55)
• sentinel armed (CronList after CronCreate)
• in-repo tick shard at docs/hygiene-history/ticks/2026/05/24/1407Z.md (durable for fresh checkouts; user-scope memos auto-load only for maintainer machines)
• required CI checks (auto-merge will gate)

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Adds an in-repo hygiene-history “tick” shard documenting the 2026-05-24T14:07Z observation that the dotgit-saturation window hit a 0 stuck git plumbing process reading (first in ~27h49m), along with confirmation that the repository contents were present/restored at the time of the cold-boot. This fits the repo’s existing operational hygiene-history practice by preserving an auditable substrate record of system observations and decisions.

Changes:

• Add a new tick shard with YAML frontmatter capturing tick metadata (time, agent context, sentinel re-arm).
• Record the 14th rolling dotgit-saturation observation and update the anchor table (now includes the 0-reading).
• Preserve operational implications and hypotheses (A/B/C) with supporting cross-links to existing .claude/rules/* guidance.