IM

Spawns a specialized worker to build features from specifications with PR traceability.

Install

mkdir -p .claude/skills/implement-mulkatz && curl -L -o skill.zip "https://agentskills.codes/api/skills/download/13034" && unzip -o skill.zip -d .claude/skills/implement-mulkatz && rm skill.zip

Installs to .claude/skills/implement-mulkatz

Activation

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Launch Mulder's implementation worker from a spec, roadmap step, or issue. Use this when the task is to build a spec-aligned change with branch and PR traceability.
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Advanced

Key capabilities

  • Resolve the target using shared spec-resolution rules
  • Build the implement handoff payload with specific input schema
  • Spawn a fresh `worker` agent with isolated context
  • Instruct the worker to rebuild context and follow `references/worker.md`
  • Validate the returned output against the shared implement output schema
  • Return a compact handoff summary

How it works

The skill resolves a target, builds a handoff payload, and spawns a worker agent. The worker then rebuilds context and performs the implementation, with its output validated against a schema.

Inputs & outputs

You give it
A spec, roadmap step, or issue for implementation
You get back
A compact handoff summary after the worker completes implementation

When to use implement

  • Implement feature from spec
  • Build roadmap item
  • Trace code changes to issues

About this skill

Implement

Use this skill as a thin launcher for a fresh implementation worker.

Read these files before acting:

  • .codex/shared/agent-contracts/authority.md
  • .codex/shared/agent-contracts/target-resolution.md
  • .codex/shared/agent-contracts/handoff-schemas.md
  • .codex/shared/agent-contracts/output-schemas.md
  • .codex/shared/agent-contracts/workflow-invariants.md
  • .codex/skills/implement/references/worker.md

Workflow

  1. Resolve the target using the shared spec-resolution rules.
  2. Build the implement handoff payload using the exact shared input schema, carrying through TARGET_STEP, ISSUE_NUMBER, and ISSUE_URL only when the resolved spec or launcher context can provide them.
  3. Spawn a fresh worker agent with fork_context: false.
  4. Instruct the worker to rebuild context from the repository and follow references/worker.md.
  5. Validate the returned output against the shared implement output schema.
  6. If the worker response is malformed, request one contract-only restatement. If it is still malformed, stop and report a blocked state.
  7. Return only the compact handoff summary.

Codex Adaptation Rules

  • This skill always launches a fresh worker, even when invoked directly by the user.
  • Do not rely on parent-thread memory; rely on repo files plus the structured handoff.
  • Keep the output contract stable so auto-pilot and standalone invocations behave the same way.
  • Keep SKILL.md lean; detailed implementation behavior lives in references/worker.md.

Output

Return the exact implement output schema from .codex/shared/agent-contracts/output-schemas.md.

When not to use it

  • When a fresh implementation worker is not needed
  • When the task does not involve building a spec-aligned change
  • When the worker response is consistently malformed after restatement

Limitations

  • Does not rely on parent-thread memory
  • Requires a stable output contract for consistency
  • Detailed implementation behavior is in `references/worker.md`, not `SKILL.md`

How it compares

This workflow uses a dedicated, isolated worker agent for implementation tasks, ensuring spec alignment and traceability, unlike direct code modifications.

Compared to similar skills

implement side by side with the closest alternatives in the catalog.

SkillInstallsUpdatedSafetyDifficulty
implement (this skill)04moNo flagsAdvanced
resolve-conflicts818moReviewIntermediate
openspec-onboard106moReviewBeginner
codex-cli-bridge99moReviewIntermediate

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