Lessons — operating manual (Iron Law)

The Iron Law

NO MUTATION WITHOUT RECALL. NO COMPLETION WITHOUT A CAPTURE DECISION.

Violating the letter is violating the spirit. Edited a file or ran a state-changing command without recall? Process violation. Did the turn hit a failure / correction / regression / wrong assumption / surprise and you have not captured (nor stated Lesson: none)? The task is INCOMPLETE — and the user will check. The graph ../../../.agentsmesh/lessons/lessons.json is canonical — never hand-edit.

Recall — before each edit/command, and at task start

agentsmesh lessons query --file <path> --cmd <command> --session auto, then apply every rule. Pure-read commands (read-only) and the query itself are exempt. keyword-only recall for a specific edit is the anti-pattern — anchor those to --file/--cmd. But at the START of a task (or when planning), run agentsmesh lessons query --keyword "<the task's key terms>" --always --session auto: that surfaces the conceptual rules no file/command names PLUS the universal always-on lessons — the manual equivalent of the automatic prompt recall on hook-capable tools. Always pass --session auto: it suppresses rules already shown this session so repeat recalls stay quiet (without it every recall re-delivers the whole matched set); --no-dedup re-shows everything after a context reset. Author a keyword trigger beside a file_glob on conceptual lessons so they are reachable both ways. No shell → MCP lessons_query (file/command/keyword/always; session dedup is on by default there — no_dedup:true to re-show).

Capture — Gate Function (before any completion claim)

1. SELF-CRITIQUE: any failure, correction, regression, wrong assumption, useful surprise, repeated friction, or non-obvious fix? Failing tests/lint/typecheck and user/review corrections — yours or anyone's — all count. PROCESS/TOOLING surprises count too (a sandbox command that silently no-op'd, a port already in use, a library's argument shape) — trigger those with --trigger-cmd. So does a review finding you REVIEWED then deliberately REJECTED: capture it as a "do NOT refactor" guard so the reasoning survives the session.
2. CAPTURE a reusable imperative rule with an effective trigger (else say so): agentsmesh lessons add "<rule>" --topic <id> --trigger-file <glob>. Trigger on the file-CLASS where it will RECUR (e.g. **/lib/use*Form*.ts), NOT the single file you discovered it in — and NOT a broad src/**. If the rule is a UNIVERSAL standard that applies to EVERY task (a comment/test/style convention no file or command names), capture it with --scope always instead — it needs no trigger and is delivered on every task.
3. RECEIPT: emit Lesson: captured <id> or Lesson: none.

At least one effective trigger is required (or --scope always for a universal rule) or the capture is rejected (UNRECALLABLE_LESSON); prefer --trigger-file. No shell → MCP lessons_query, lessons_add, lessons_topics, lessons_show, lessons_deprecate. Run agentsmesh lessons --help for every subcommand and flag: query, add, topics, show, deprecate, merge, untrigger, strip-markers, prune, journal, validate, stats, import-md.

Rationalization Prevention — these excuses mean STOP

Excuse	Reality
"Small edit / I already know this / later"	Query first — skipping recall is a process violation
"Nothing reusable here"	You hit a failure/surprise — name it or capture it
"My own TDD red, not a real failure"	A red you did not predict IS a lesson
"I fixed one site; the twin is obvious"	Capture it — the unfixed twin is what gets missed
"Different words, so the rule doesn't apply"	Spirit over letter

Lesson gate — before final response

The final response MUST carry the receipt: Lesson: captured <id> or Lesson: none. No receipt = task incomplete. Do not capture one-off facts, task summaries, or project context — only reusable imperative rules with an effective trigger.