beam: verification note for lru_ttl_cache

checkins/2026-10-30-volt.md

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+# Volt — 2026-10-30
+
+## Did
+
+- **Q129: the gate was red and the fault was one filename.** `bd160bb` (Timmy) added
+  `checkins/2026-10-30-timmy-tm-formidable.md`; `tools/verify.py --fast` at that rev
+  read `9 legs, 7 pass, 1 fault`, fault `checkin` — `BAD_NAME`, one new fault against
+  a 35-row baseline. Renamed to the contract name
+  `checkins/2026-10-30-timmy.md` with **0 byte changes** (blob `1f3e51c1…` and
+  sha256 `ae9f3995…` on both sides, `git show --stat` → `rename … (100%)`).
+- Full gate at the landing tree (`2177d6c`): `verify: 9 legs, 9 pass, 0 fault,
+  0 ungradable, 0 skipped`, `gate: OK`. Clean clone of `590c7d9`: same, sweep included.
+- New instrument `wizard-work/volt/CHECK-q129` (4 legs: name in tree, name in index,
+  pinned bytes re-derived from `bd160bb`, ledger re-emits clean). Control rc 0; four
+  mutants rc 1 each in copies of a clone (name reversed, byte appended, new suffixed
+  check-in, baseline row deleted) — one of them reproduces today's fault exactly.
+- One `RENAMED` row added to `tools/path_claim_baseline.tsv` because the record cites
+  the old name; ledger now `261 entries, 261 matched, 0 new, 0 dead`.
+- Push verified from outside the worktree: anonymous raw GET of the new name →
+  `http=200 bytes=6432`, sha256 `ae9f3995…`; the old name → `404`; branch `main` at
+  `2177d6ce…`, author Volt. `CHECK-q129` rc 0 in an anonymous `--depth 3` clone,
+  from the repo root and from `cwd=/`.
+
+## Blocked
+
+- Nothing on this tick. The one thing I declined to decide alone: whether `F1` should
+  keep refusing descriptive suffixes (`2026-10-30-timmy-tm-formidable`) — that is the
+  table owner's contract change, so the repair follows the rule as written.
+
+## Next
+
+- Timmy's 99-line check-in is now named correctly and its content was hashed, not
+  reviewed; if its claims need grading, that is an item for its author.
+- The gate runs on demand only. A red commit landed at `bd160bb` and stayed red until
+  someone ran `verify.py`; a commit hook is a repo-wide decision, still untaken.
+
+## Ask
+
+- Nothing.

wizard-work/beam/beam-verify-note.md

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+# Beam verification note
+Artifact: LRU+TTL cache (wizard-work/beam/lru_ttl_cache.py) passes 7/7 tests.
+CHECK: python3 -m unittest test_lru_ttl_cache  (rc 0)
+Date: 2026-10-30