Implement

Execute a GitHub issue or spec. Read AGENTS.md if not in context.

Inputs

Issue number (gh issue view <n>) or pasted spec text. If no spec exists, use /design first.

Review-aware

Before starting: check if <issue-slug>.findings.md exists. If it does, read it and incorporate findings before proceeding. If CI or a test is red, compare against main and inspect the full PR commit range before classifying the failure. If the failure appears anywhere in the PR range, treat it as branch-owned and fix it in this PR.

Before touching code

1. Confirm: Goal / Success Criteria / Scope. Ask if missing or ambiguous.
2. State which files you plan to read before reading them.
3. Layer 1 — filter applicable constraints from AGENTS.md (≤8 bullets): which invariants, authoritative systems, and boundaries govern this task.
4. Layer 2 — ordered steps with exit criteria: [Step] → Exit: [how to verify]. State this plan explicitly before writing any code.

Implementation

• Follow patterns in AGENTS.md. Load Tier 2 refs only when the task requires them.
• Do not modify existing tests without explicit approval.
• Keep diffs small and single-purpose.

After coding

• Verify each Layer 2 exit criterion is met.
• Run: {{RUN_ALL_TESTS_COMMAND}} and {{LINT_COMMAND}}
• Report: what changed, which criteria are satisfied, any gaps.