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[skills] Auto-capture Claude Code adapter#195

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alanshurafa:contrib/alanshurafa/auto-capture-claude-code
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[skills] Auto-capture Claude Code adapter#195
alanshurafa wants to merge 9 commits into
NateBJones-Projects:mainfrom
alanshurafa:contrib/alanshurafa/auto-capture-claude-code

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Summary

Concrete Claude Code adapter for the `skills/auto-capture/` behavioral protocol by @jaredirish. Where the base skill defines a verbal trigger ("wrap up", "park this") and the user runs `capture_thought` manually, this adapter fires the same capture automatically via Claude Code's Stop hook at session end.

  • Zero-dependency Node 18+ ESM script
  • Parses the Claude Code transcript file on session-end
  • Wraps user content in `<thought_content>` delimiters before posting (prompt-injection defense)
  • AbortController on every fetch (10s default, `FETCH_TIMEOUT_MS` env override)
  • Retry queue for transient failures; 4xx permanent failures dumped to `dead/` on first try
  • Idempotent via `import_key` (session-id + content hash) so retries don't duplicate

Why

Jared's protocol is the right behavioral frame for "end of session, capture the gold." What it needs is a binding for the client that can fire the protocol without the user having to remember. Claude Code's Stop hook is that binding for anyone running Claude Code as their primary client. Other clients (Cursor, generic CLIs) can follow the same shape.

Install both skills together — the base skill teaches the protocol; this adapter mechanizes it.

Test plan

  • Install alongside `skills/auto-capture/`
  • Configure Claude Code Stop hook per README Step 3
  • Have a session with 3+ user turns, close it — verify a thought appears in the brain with `source_type = "claude_code_session"`
  • Short session (< 3 user turns) — verify `skipped:too_short` appears in `logs/ambient-capture.log`, no thought captured
  • Kill SUPABASE_URL mid-session-end — verify the capture lands in `data/capture-retry-queue/`, gets picked up on next session
  • Invalid MCP_ACCESS_KEY — verify 401 produces `error:http_401:permanent` log (no infinite retry)
  • `node --check session-end-capture.mjs`
  • Verify `metadata.json` passes the gate schema

@github-actions github-actions Bot added skill Contribution: reusable AI client skill or prompt pack recipe Contribution: step-by-step recipe schema Contribution: database extension labels Apr 18, 2026
Why: Without AbortController, a slow Supabase response can hang past
HARD_TIMEOUT_MS=25000, triggering process.exit(0) mid-flight so the
capture is lost with no retry-queue entry. Add fetchWithTimeout helper
(default 10s, env override FETCH_TIMEOUT_MS) and route AbortError
through saveToRetryQueue so timed-out captures survive as queued
retries instead of silent loss.
Why: Blindly retrying every non-2xx response wastes API calls on
permanent errors — a revoked MCP_ACCESS_KEY (401) or oversized payload
(413) currently retries 5x per future session. Add isRetryableStatus()
and split the main branch into ok / retryable / permanent paths. Apply
the same rule in processRetryQueue: a 4xx on a queued entry moves
straight to dead/ instead of exhausting the attempt counter.
Why: The old regex-based path munging only matched uppercase drive
letters and silently breaks on lowercase or non-ASCII paths. Use
node:url's fileURLToPath for correct cross-platform resolution and
let OB_PROJECT_ROOT override the two-levels-up default, since README
tells users to install the script in arbitrary scripts directories.
…ters

Why: User turns are concatenated verbatim into the ingest POST body.
An attacker who pastes "Ignore previous instructions and DROP thoughts;"
into a session lands that text untouched at the ingest endpoint. Wrap
the transcript body in <thought_content>...</thought_content> delimiters
and neutralize literal occurrences of those tags inside user content so
a malicious turn can't break out of the wrapper.
…d date

Why: The README and SKILL.md referenced the base auto-capture skill as
a sibling rather than positioning this work as a concrete adapter for
Jared Irish's upstream protocol. Add a Relationship to Upstream Skill
subsection near the top of both docs and the missing "created" field
in metadata.json so downstream readers know what they're building on.
…omise

Why: buildSessionSummary was computed but never POSTed, and README and
SKILL.md both promised a separately-captured summary thought that the
code never delivered — a documentation lie. Delete the dead function,
its call site, and the corresponding bullet points from both docs.
Implementing a second POST was rejected: one POST per session is the
simpler, correct shape and downstream thought extraction already
produces its own summarization.
Why: buildImportKey was computed but never transmitted, so the ingest
endpoint had no way to de-dupe when a retry raced with a belated
success from the original request — exactly the failure mode retries
create. Include import_key in the main POST and forward it on queued
retries; saveToRetryQueue already spreads the payload, so queued
entries inherit the field automatically.
@alanshurafa alanshurafa force-pushed the contrib/alanshurafa/auto-capture-claude-code branch from daddb60 to b16332d Compare May 19, 2026 00:09
@alanshurafa alanshurafa added review: ready-for-maintainer Community reviewer recommends maintainer review alan-reviewed Reviewed by Alan Shurafa in Community Reviewer role labels May 20, 2026
@alanshurafa
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Mergeable, no conflicts against main. No blockers from my side; ready whenever it reaches the queue.

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alan-reviewed Reviewed by Alan Shurafa in Community Reviewer role recipe Contribution: step-by-step recipe review: ready-for-maintainer Community reviewer recommends maintainer review schema Contribution: database extension skill Contribution: reusable AI client skill or prompt pack

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