ops(B-0106 closeout + tick-history): mark B-0106 closed; append tick row

[AceHack]

Summary

Closeout for B-0106 (tsc-noEmit gate job, implemented in #890 commit 9ca9ed9):

1. B-0106 row update — status: in-progress → closed; added closed_in: PR #890 (commit 9ca9ed9, 2026-04-30).
2. Tick row at 2026-04-30T05:11:00Z — appended to loop-tick-history.md (319 → 320). Covers the full bug-class loop closure (find local TS2322 → fix fix(ts): tsc TS2322 in audit-agencysignature-main-tip — narrow ArgStep.key #887 → file row backlog(B-0106): add P2 row — tsc --noEmit gate job for tools/**.ts #888 → implement gate ci(B-0106): add lint-tsc-tools gate job — tsc --noEmit on tsconfig.json #890) and observations on the semgrep-elevation-shape pattern applied to typecheck.

Why a separate closeout PR

B-0106's implementation PR (#890) had to land first to validate that the new lint (tsc tools) job runs against its own diff (self-validation). Now that #890 is on main, the row update + tick history move forward in a small follow-up PR.

Test plan

• B-0106 row frontmatter parses (status enum: open / in-progress / closed; matches existing per-row schema).
• Tick row matches the canonical 6-column schema (date / agent / cron-id / action-summary / commit-or-link / notes); col-5 = 9ca9ed9 per schema.
• CI gate (lint markdownlint + tick-history order + the new lint-tsc-tools).

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Closes out backlog item B-0106 (TypeScript tsc --noEmit CI gate for tools/**/*.ts) and records the closure in the autonomous loop tick history.

Changes:

• Mark B-0106 as closed and add a closed_in pointer to PR #890 / commit 9ca9ed9.
• Append a new loop tick history row documenting the B-0106 closeout and implementation lineage.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
docs/hygiene-history/loop-tick-history.md	Appends the 2026-04-30T05:11:00Z tick row describing the B-0106 closeout arc and observations.
docs/backlog/P2/B-0106-tsc-noemit-gate-job-for-ts-tools-2026-04-30.md	Updates frontmatter to status: closed and records closed_in referencing PR #890 / commit 9ca9ed9.