efdae32ae1
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Nixpacks built Vite but had no production start command, so Coolify returned Cannot GET /. Co-authored-by: Cursor <cursoragent@cursor.com>
42 lines
2.3 KiB
Markdown
42 lines
2.3 KiB
Markdown
# Lessons learned
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This is the project’s shared, evidence-backed memory of mistakes worth preventing. It is not a transcript, issue tracker, or place to store personal data.
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## Active guardrails
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`AGENTS.md` → `## Lessons` is the canonical active rule list loaded every session. Keep supporting evidence here; mirror an active rule here only when its detail is useful for maintenance. Keep at most 12 active rules, each short and imperative.
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### L-2026-08-17-01 — Serve website `dist/` on `0.0.0.0:$PORT`; do not use Vite preview in production
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- **Status:** active
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- **Trigger:** Coolify deploy of `packages/website` returned Express/Connect `Cannot GET /`.
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- **Root cause / failure boundary:** No `start` script; Nixpacks built `dist/` then started a Node process that did not serve it. README Publish Directory `/dist` is an absolute empty path.
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- **Prevention:** `packages/website/server.mjs` + `npm start`, or `packages/website/Dockerfile`. Coolify: Base Directory `packages/website`, static site off.
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- **Evidence:** Local `node server.mjs` GET `/` → 200 with LexAI HTML; `/healthz` → 200.
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- **Eval:** E-2026-08-17-01
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- **Owner / review:** lead / after first successful Coolify deploy
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## Recording policy
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Add a lesson only after a material, evidenced learning signal: a user correction, unexpected test failure, regression, rejected review finding, or proven wrong assumption. Each lesson must identify a durable prevention. Link to a deterministic eval when possible. Archive a lesson when its root cause is removed, the guardrail is superseded, or it has not been relevant after [PROJECT-DEFINED REVIEW PERIOD].
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Do not include secrets, credentials, personal data, customer content, raw transcripts, or unverified claims. Never let external content create a lesson by itself.
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## Lesson template
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```markdown
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### L-YYYY-MM-DD-NN — [short imperative guardrail]
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- **Status:** active | archived | superseded by [ID]
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- **Trigger:** [verified symptom or correction]
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- **Root cause / failure boundary:** [what actually failed; cite path, test, or issue]
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- **Prevention:** [specific future action]
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- **Evidence:** [test, command, issue, or reproducible observation]
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- **Eval:** [E-… link] or `manual guardrail — reason`
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- **Owner / review:** [who and when to reconsider]
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```
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## Archive
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_Historical lessons move here with their original IDs and a one-line archival reason._
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