CODE-026: index-accelerate history + search consumers (blocked on GRAF-002/SPOT-003)

Now: OPEN
Sev: LOW

Deps: BLOCKED on landing two worktree modules into be/ — GRAF-002 shared/commitindex.js (lazy commit-DAG index: p1 parentage / p2 commit→tree / p3 tree-child edges / p4 commit-ts) and SPOT-003 shared/spotidx.js (trigram reject-filter). Both are put-staged, NOT in be/ yet. Perf only. See Beagle indices.

Input

Context

These consumers do full O(history) / O(tree) / O(files) walks that a landed index would answer index-only; the indexes exist as worktree modules but are not merged, so today the walks are the only option.
commitindex p1-p4 (GRAF-002) serves parentage / commit→tree / tree-child / ts; spotidx (SPOT-003) is the trigram pre-filter for tree-wide search.

Goals

Once the indexes land, retarget each walk below onto the index; keep the full-walk path as the cold/miss fallback the indexes already assume.

Constraints

Do NOT re-implement either index here — consume commitindex / spotidx once landed. be/ JS only. Each retarget is behavior-preserving (same results, fewer object reads), repro-gated on a warm-vs-cold walk-count.

WIP

TODOs

lastcommit.js:62 first-touch age per list entry (O(history×tree), hit on every list:) → commitindex p1+p3+p4 [dep GRAF-002]
log.js:185/:282 branch + file history → commitindex p1/p2/p3/p4 [dep GRAF-002]
why.js:105 blame closure + weave.build → commitindex p1/p2/p3 [dep GRAF-002]
head.js:170 rebuilds a wh128 child→parent index INLINE per call → persisted commitindex p1 [dep GRAF-002]
spot/search.js:175 full-scan grep/spot/regex → spotidx trigram filter [dep SPOT-003]

Blockers and bummers

All items blocked until GRAF-002 / SPOT-003 merge into be/; unblock this ticket when they land (verify via jab log, not the worktree READMEs).

Outcome

Blocked. Suggested commit (per item, post-merge): CODE-026: <consumer> via commitindex/spotidx.