Turns DESIGN.md from a spec into a working plugin. Five stdlib scripts, three
hooks, agent, command, three references, plugin manifests.
The gates are the design:
L1 -> L2 >= 3 distinct sessions spanning >= 2 distinct calendar days
(`stated` = 2 sessions, day rule still applies; `verified` = 1
observation and is the only day-exempt path)
L2 -> L3 >= 2 distinct projects, >= 30 days, uncontested
Two gates refuse rather than guess. `redacted: true` blocks promotion on any
volume of evidence -- a durability-independent barrier, since a secret restated
across five sessions passes every recurrence gate; the flag firing means the
text was altered, a lexical filter finding one secret is not proof it found all
of them, and L2/L3 are committed to git. An open contradiction freezes both
claims, found by reverse join because the newer atom carries no flag.
All three hooks fail open: a broken memory system costs memory, never a session.
SessionEnd stages promotions to .memory/staged/ and never touches a CLAUDE.md;
only an explicit human adopt does, after backing both files up.
Verified, not asserted:
- all three pinned atom ids from DESIGN.md reproduce exactly
- both blocking gates demonstrated on sample input, named in the output
- end-to-end: two transcripts across two calendar days -> merged L1 atom ->
staged L2 promotion with the path prefix stripped
- reverse join blocks the unflagged newer atom
- cross-tier L2/L3 collision marked at injection time
- recall p50 29ms / p95 31ms / max 35ms spawn-to-exit, scoring itself 2-3ms
over 500 atoms -- interpreter cold start is the entire cost
- validate_examples.py 69 checks 0 failures; SKILL.md 6/6 PASS
- derive_counters --check, check_plugin_json --all, check_paths all clean
DESIGN.md 10.1's "+6" tool estimate corrected to +8 -- the delivered surface is
5 scripts + 3 hooks. README.md's deviations list is authoritative for that and
five other divergences from the pre-implementation spec.
Concept from TencentCloud/TencentDB-Agent-Memory (MIT). No upstream code.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EM5xmJ7AmTMg31rq68BCym
