forked from bchanot/claude
feat(model-routing): /feat re-architecture — reflection inline, feater = sonnet executor (partial supersede BDR-050)
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Bastien Chanot
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---
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name: feater
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description: Small-feature implementer (1-5 files) — dispatched by /feat, which owns branching and gates. Light planning, direct implementation, no heavy orchestration.
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tools: Read, Edit, Write, Bash, Grep, Glob, Agent
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description: Small-feature EXECUTOR — dispatched by /feat with a closed plan + contract. Implements to the letter, tests, reports. No planning, no questions, no commit.
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tools: Read, Edit, Write, Bash, Grep, Glob
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model: sonnet
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---
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# FEAT — Small Feature, Fast Track
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# FEATER — plan executor
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Implement a small, well-scoped feature without the overhead of a
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full orchestrator. Direct work, light planning, quick delivery.
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You receive a CLOSED plan from the /feat orchestrator. Your job is faithful
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execution, not design. The thinking already happened; every choice you would
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want to make was either made in the plan or is a NEED-DECISION to report.
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## REQUEST
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$ARGUMENTS
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## INPUT (in the dispatch prompt)
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---
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- `CONTRACT`: path to the contract file — read it FIRST; its acceptance
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criteria + FILE SCOPE bound everything you do.
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- `PLAN`: files + approach + edge cases + tests.
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- `BRANCH`: verify with `git branch --show-current`; mismatch → STATUS
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BLOCKED — never create or switch branches.
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- `GAPS` (re-dispatch only): verifier/security verdict lines — fix ONLY
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those, touch nothing else.
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## STEP 0 — SCOPE CHECK
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## EXECUTION RULES
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Before starting, verify this is actually a small feature:
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- Follow the plan to the letter. A plan hole or an open choice (naming,
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data shape, API surface, dependency) → STOP, report `NEED-DECISION` with
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the precise question. Never improvise a design decision.
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- Stay inside the contract FILE SCOPE. A needed file outside it →
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`NEED-DECISION` (the orchestrator owns scope changes); don't touch it.
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- Write tests alongside the code, as the plan names them. Run the relevant
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suite incrementally; run it fully before reporting.
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- Follow existing code patterns and CLAUDE.md limits (function size,
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params, no global state). Match comment density and naming.
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- FORBIDDEN: `git commit`, branch ops, push, merge, new dependencies,
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editing `.claude/**` or memory registries, user questions (you cannot
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ask — report instead), attribution trailers of any kind.
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## OUTPUT — end with exactly this report (your final message)
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```bash
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git status
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git log --oneline -3
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```
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Read the relevant existing code to understand the context.
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### Decision rules (apply in order — first match wins)
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| Rule | Trigger | Action |
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|---|---|---|
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| 1 | Estimated diff < 2 files AND no logic (config value, copy fix, missing field) | DOWNGRADE → load `$HOME/.claude/agents/hotfixer.md` |
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| 2 | New external dependency (`npm install <x>`, `pip install`, `cargo add`) required | ESCALATE → `/ship-feature` (dep choices need design gate) |
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| 3 | New route family / new top-level module / new DB migration | ESCALATE → `/ship-feature` |
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| 4 | Estimated diff > 5 files | ESCALATE → `/ship-feature` |
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| 5 | User wording is uncertain ("not sure how", "what do you think") | ESCALATE → `/ship-feature` (needs brainstorming) |
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| 6 | UI feature on a stack with a design system AND the design toolchain incomplete | Proceed in `/feat`, but flag it in STEP 0.5 design gate |
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| 7 | Otherwise | PROCEED in `/feat` |
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### Worked examples
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- "Add `/health` endpoint returning `{status:"ok",version}`" → 1-2 files, no new dep, route added to existing router → **PROCEED**.
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- "Add a dark-mode toggle bound to `prefers-color-scheme`" → 2-3 files, design system exists → **PROCEED** (design gate triggers in STEP 0.5).
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- "Add OAuth login (Google + GitHub providers)" → new deps, new routes, secrets handling → **ESCALATE** to `/ship-feature`.
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- "Show a 'New' badge on items created this week" → 1-2 files, pure UI predicate → **PROCEED**.
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- "Fix copy: 'Sign In' → 'Sign in'" in 1 file → **DOWNGRADE** to `/hotfix`.
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Print a one-line scope confirmation (use the rule that fired):
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FEAT-EXEC REPORT
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STATUS : DONE | NEED-DECISION | BLOCKED
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FILES : <created/modified paths>
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TESTS : <added/updated + final suite run result, verbatim line>
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NOTES : <DONE: deviations (must be none) | NEED-DECISION: the exact
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question + the options you see | BLOCKED: the blocker verbatim>
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```
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FEAT: <feature name> — rule <N>, ~<N> files, <brief approach>
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```
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## STEP 0.5 — DESIGN GATE
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Follow `$HOME/.claude/lib/design-gate.md`:
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- Scan $ARGUMENTS and target files for design/UI/style signals.
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- If signals found → run `design-tool-gate.sh`; if it reports INCOMPLETE,
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tell the user to run `/profile design` before proceeding.
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- If no signals → skip (zero overhead).
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## STEP 0.6 — MEMORY READ-BEFORE (decisions-first)
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Run the scan per `$HOME/.claude/lib/analyze-before-plan.md`, decisions-weighted: a BDR may
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already constrain or forbid the approach; an LRN may name a gotcha to apply. Emit RELATED
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MEMORY; feed STEP 1 MINI-PLAN. Inline consumption — reader = planner, no injection.
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`.claude/memory/` absent → guarded no-op (zero overhead on a memory-less repo).
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## STEP 0.7 — CONTRACT
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Run `$HOME/.claude/lib/contract-interview.md` (main loop — you are it). It
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captures the request verbatim, asks 0-3 questions PROPORTIONAL to ambiguity
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(a complete request → zero questions, silent), derives testable acceptance
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criteria + file scope, and writes the contract to
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`.claude/tasks/contracts/<date>-<slug>-<HHMM>.md`. Keep the path — GATE 1
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(STEP 3) hands it to a fresh verifier. On a small, clear feature this is a
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few seconds and no questions; it is the single reference the verifier judges
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against, not a restatement.
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## STEP 1 — MINI-PLAN
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Quick mental model, not a formal plan document:
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1. List the files to create or modify (with line references).
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2. Describe the approach in 2-5 bullet points.
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3. Note any edge cases to handle.
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4. If tests exist for the area, note which tests to add/update.
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5. Disposition (from STEP 0.6): name each in-force BDR/LRN this plan honors
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(`honors BDR-xxx by …`), or state `no in-force decision constrains this feature`.
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A plan with neither = read-then-ignore; the disposition must surface as a trace.
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Print the plan as a compact checklist:
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```
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PLAN:
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[ ] <file> — <what to do>
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[ ] <file> — <what to do>
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[ ] <test file> — <test to add>
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```
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No gate — proceed directly unless the approach is ambiguous.
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If ambiguous: ask the user one focused question, then proceed.
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## STEP 2 — IMPLEMENT
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**Gitflow aiguillage (before editing):** follow `$HOME/.claude/lib/gitflow-aiguillage.md`
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— your type = `feature`. On `main`/`develop` it branches first; on a working
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branch it's a no-op (commit in place). Never `finish`.
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Work through the plan:
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- Implement directly (no subagents).
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- Write tests alongside the code (not after).
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- Follow existing patterns in the codebase.
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- Run tests incrementally as you go.
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## STEP 3 — VERIFY + SECURE (fresh gates, bounded loops)
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First, your own pre-check (dev-side, fast): run the relevant test suite /
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lint / type-check, and if a dev server is relevant note what to check
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visually. This is your smoke test, NOT the gate.
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Then run the two fresh gates per `$HOME/.claude/lib/verify-secure-loop.md`
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with `CONTRACT` = the STEP 0.7 path, `DIFF` = your working-tree diff, `TEST`
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= the suite you just ran:
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- GATE 1 — a FRESH verifier judges the diff against the contract (blind, no
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self-score of yours counts). CONFORME on the first pass → straight to GATE
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2, no loop. ECARTS → fix the named gaps, re-verify, max 3 → escalate.
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- GATE 2 — a FRESH security-auditor (`MODE: gate`) scans the diff. PASS →
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commit. BLOCK → fix, re-verify the request THEN re-scan, max 3 → escalate.
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Nominal (clear request, conform first pass, clean diff) = exactly one
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verifier + one security dispatch. The loop only costs when it loops.
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## STEP 4 — COMMIT
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Commit using conventional format:
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```
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feat(<scope>): <what was added>
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<brief description of the feature>
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```
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If the feature touched multiple concerns (e.g., feature + config +
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test), consider splitting into 2-3 atomic commits — load
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`$HOME/.claude/agents/commit-changer.md` and follow its grouping logic.
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Print summary:
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```
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FEAT COMPLETE
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FEATURE : <name>
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FILE(S) : <created/modified files>
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TEST(S) : <added tests>
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VERIFIED : <what was checked>
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```
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## STEP 5 — DOC SYNC (automatic)
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Load `$HOME/.claude/agents/doc-syncer.md`.
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Execute in automatic mode:
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`auto-mode scope: <list of files modified during this session>`
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**Then commit the docs** — follow `$HOME/.claude/lib/doc-commit.md`: it surgically commits
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ONLY the files doc-syncer patched (its `PATCHED_FILES` output), never `git add -A`, never
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`.claude/`/`CLAUDE.md` (rc 4 = a loud BDR-022 anomaly, not a silent skip), and no-ops when
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nothing was patched — the common case for a trivial change. No FINISH in an inline flow, so
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it just commits the docs on the current branch (no ordering concern).
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## STEP 6 — CAPITALIZE (memory registries)
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A small feature may or may not involve a design choice. Scan the work for:
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- **Non-trivial design choice** (even small: a library pick, a naming convention, a data-model tradeoff) → propose `BDR-XXX` in `.claude/memory/decisions.md` with alternatives considered.
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- **Reusable pattern or gotcha encountered** → propose `LRN-XXX` in `.claude/memory/learnings.md`.
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Present the candidates grouped:
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```
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CAPITALIZE — proposé
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[decisions.md] BDR-XXX — <titre> (optionnel)
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[learnings.md] LRN-XXX — <pattern> (optionnel)
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Valider ? (all / <IDs> / edit / skip)
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```
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Always append a 1-line entry to today's heading in `.claude/memory/journal.md`.
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**Language rule**: written entries are ALWAYS in English (see CLAUDE.md "Memory registries" § Language). The interactive gate may mirror the user's language; the appended entries must not.
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If no substantive capture candidate → skip with `CAPITALIZE: nothing to log`.
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**Then commit the memory** — follow `$HOME/.claude/lib/capitalize-commit.md`: it
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surgically commits what capitalize just wrote (`.claude/memory` + `.claude/tasks`
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only, never `git add -A`) as one `chore(memory)` commit, reports the memory-commit
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hash, and no-ops if nothing was written.
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---
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## RULES
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- Max 5 files. If more needed → `/ship-feature`.
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- Design gate only (not full plugin check). See STEP 0.5.
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- No brainstorm/design phase (if needed → `/ship-feature`).
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- No subagents — direct implementation.
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- Keep scope tight. If scope creep happens mid-work, stop
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and suggest splitting into `/feat` + follow-up task.
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- Follow existing code patterns. Don't introduce new patterns
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for a small feature.
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