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The definitive sweep (audit every AGENTS.md mention in packages/, docs/, examples/, scripts/) found thirteen more citations of relocated policy and two citations of rules that never existed as quoted: - with-key policy comments (web deepseek/perplexity e2e headers) -> docs/testing.md; real-impl-over-mock comments (acp harness, load, stream-update specs) -> docs/testing.md; defensive-pattern quotes (acp index.ts x3, stream-update) -> docs/defensive-patterns.md. - md-tier repoints: real-api-e2e RFC, tool-schema-catalog RFC, postmortem 0001 guardrail row, adding-a-package cookbook, drop-bash-output-spill-files RFC, acp-subagent-backend RFC phrasing. - Two false attributions dropped in favor of self-contained reasoning: tool-todo's 'don't validate scenarios that can't happen' and the bash-stdin-env RFC's 'Don't add features beyond what the task requires' (neither rule ever existed under those names). - Citations of the two 'not golden truth' doctrines stay: those bullets survive verbatim in the root conventions. Note: packages/support/ui-stdio readline TTY spec flakes under full coverage on a heavily loaded box (passes standalone and passed the same tree's coverage run minutes earlier); untouched by this stack.
Post-mortems
Incident write-ups: a bug reached a place it shouldn't have (a real user, a merged PR, a release), and the interesting part is why our process let it through, not just the one-line fix.
A post-mortem is NOT an RFC (which records a deliberate design decision and its rejected alternatives, or proposes future work). It is a backward-looking record of a failure: what broke, the mechanism, why every safety net missed it, and the concrete guardrails added so the same class of bug fails loudly next time.
Write one when a bug is subtle (the mechanism is non-obvious and a careful engineer would re-derive it the hard way), systemic (the reason it escaped is a gap in tests/tooling/conventions, not a one-off typo), and costly to rediscover (it cost real debugging time, and would cost it again). Link the guardrails (tests, AGENTS.md rules, ADRs) the post-mortem motivated.
Every post-mortem opens with an Executive summary: one short paragraph a busy reader can absorb in thirty seconds — what broke, the root cause in plain terms, why it escaped, and the durable lesson — before the detailed Summary / Timeline / Root cause / Guardrails sections that follow.
| # | Title |
|---|---|
| 0001 | ACP server crashed on connect: export default dropped the plugin's inject |