workflow-fix: agent-memory per-file size ratchet + trim the 350KB codex-code-reviewer compose-recipe memory

Overview / Motivation

.claude/agent-memory/codex-code-reviewer/feedback_revision_round_compose_recipe.md has grown to 350,521 bytes (measured 2026-08-24, repo content synced from origin/main). The codex-code-reviewer composer reported it as unreadable during the #2502 round-5 compose (2026-08-24): the file exceeds what the agent can page in, so the memory is dead weight — worse than absent, because it displaces the working recipe it was meant to preserve and inflates every compose round's fixed overhead (the same fixed-overhead class that drives Class-2 autocompact thrash, #2472).

The lint surface has an agent-memory INDEX size ratchet (MEMORY.md WARN >20KB / FAIL >24KB, #1891) but no per-memory-FILE cap — which is exactly how a single always-appended recipe file grew 15x past the index cap with no signal.

Deliverables

1. Repair/trim the file now: distill feedback_revision_round_compose_recipe.md to a working-size recipe (target: within whatever cap item 2 sets; the durable content is the recipe's current form, not its append history — git history preserves the old bytes). Update the MEMORY.md index line if the hook changes. Run the gotchas.md no-lost-row discipline in spirit: anything dropped must be genuinely superseded-by-later-rows, not merely old.
2. Add a per-file size ratchet for .claude/agent-memory/**/*.md in scripts/workflow_lint.py (same shape as the #1891 index ratchet: WARN then FAIL; suggested WARN >24KB / FAIL >48KB, grandfathering audited existing files), wired into the same pre-commit surface so the next runaway append fails loud at commit time instead of at compose time months later.
3. Persist the composer's round lesson (from the same #2502 r5 compose, currently nowhere durable): a re-posted smoke-arch marker can carry a verbatim prior-round narrative whose stale rationale sentence contradicts its own new verdict line — pre-adjudicate it as disclosed carry-forward, not a verdict/notes contradiction. Land it as a small NEW memory file under .claude/agent-memory/codex-code-reviewer/ (post-trim), indexed in that agent's MEMORY.md.

Provenance

workflow_fix_target: .claude/agent-memory/codex-code-reviewer/feedback_revision_round_compose_recipe.md, scripts/workflow_lint.py

Reported by the codex-code-reviewer composer during #2502 code-review round 5 (2026-08-24): "my memory file ... has bloated to 342 KB (unreadable) and needs repair/trim at a safe commit point". Filed by the #2502 orchestrator session per .claude/rules/workflow-fix-on-bug.md (surfaced-prose follow-up). Dedup checked: #2444 (sync-subject clobber) and #2341 (guard pathspec) touch the same path only incidentally — distinct bugs, distinct tasks.