deadfish-implement

name	deadfish-implement
description	Implementation constraints, git conventions, Codex MCP usage.

deadfish-implement — Implementation Protocol

Hard Constraints

• Only modify files listed in TASK.FILES. Need a new file? Stop and ask Lead.
• Follow TASK.COMMANDS exactly.
• Run verify in both phases:
  • Before commit: bin/verify.sh --project-dir . --task-file <task.md> --mode pre-commit
  • After commit: bin/verify.sh --project-dir . --task-file <task.md> --mode post-commit --base-commit <sha>
• Maximum 3 fix cycles per task. On failure, produce failure report and stop.
• Single commit per task: "{task_id}: {short title}"

Living Docs Hot Exception

• Default rule: do not churn docs/living/* during per-task implementation.
• Hot exception (only one): docs/living/TECH_STACK.md.
• TECH_STACK may be updated in-task only when it is explicitly listed in TASK.FILES (typically alongside dependency manifest/lockfile changes).
• No other living-doc file is allowed as an in-task exception unless Lead explicitly amends the task packet.

TaskCompleted Hook vs QA Protocol

• "TaskCompleted hook runs verify.sh only" refers to hook execution scope, not final QA scope.
• QA order remains:
  1. verify.sh deterministic gate
  2. criteria fan-out for acceptance checks
  3. build-verdict aggregation
• Do not treat hook completion as equivalent to a final PASS verdict.

Codex MCP Usage

Start implementation:

Tool: mcp__codex-coder__codex
Parameters:
  prompt: "<TASK SUMMARY verbatim + FILES context>"
  cwd: "/path/to/project"
  sandbox: "workspace-write"

Continue if needed:

Tool: mcp__codex-coder__codex-reply
Parameters:
  prompt: "Fix: verify.sh reports <failure details>"
  threadId: "<from previous response>"

Implement Sentinel

```deadfish:IMPLEMENT
task_id: auth-P1-T02
changed_files:
  - path: src/auth/jwt.ts
  - path: tests/auth/jwt.test.ts
summary: "Added JWT generation with RS256 signing and 15min expiry"
verify:
  command: "bin/verify.sh"
  result: PASS
notes: null
```

Retry Protocol

On retry (Lead sends QA feedback):

1. Read verdict + failure details
2. Append retry context AFTER SUMMARY (never replace original)
3. Re-dispatch to Codex with enriched prompt
4. Max 2 retries. After that → Conductor arbitration.

Integration (Integrator only)

```deadfish:INTEGRATE
why_called: "T02 and T03 both modified src/auth/index.ts"
changes:
  - "Merged export lists from both tasks"
  - "Resolved import order conflict"
verify_sh: PASS
```