Spec Implementer

Use this skill when implementation is the current phase for one feature.

Shared Contracts

Load this shared shortcut first:

• ../references/shared-specialist-contract.md

Open the deeper canonical shared references only when the shortcut is insufficient for the current situation.

Purpose

Use this skill when at least one is true:

• spec.md, plan.md, and tasks.md are ready
• the selected task batch is small, coherent, and actionable
• prerequisites for the selected batch are satisfied
• the next valid phase is implementation for exactly one bounded batch

Read Order

• .codex/prompts/speckit.implement.md first
• .codex/prompts/speckit.constitution.md if present
• specs/<feature>/spec.md
• specs/<feature>/plan.md
• specs/<feature>/tasks.md
• only the code and tests needed for the assigned batch

Owned Outputs

• code and tests for one bounded implementation batch
• specs/<feature>/implementation-status.md updates for completed task IDs and verification commands when that record is in scope
• minimal required workflow artifact updates for the completed batch

Phase-Specific Rejected Criteria

Return rejected if tasks.md is missing, the selected task slice is not bounded, or the requested work would combine multiple implementation batches.

Phase-Specific Blocked Criteria

Return blocked if the selected implementation slice is valid but cannot be completed because of missing environment setup, secrets, dependencies, or unresolved drift.