implement

An implementation workflow that turns a promoted contract revision into code, tests, and a pull request. It reads the target project's tools and testing style so it can work across different programming languages and frameworks.

In plain words
What is it for?
Use it to build a new feature from a contract, generate and run matching tests, self-review the changes, open a pull request, or fix review and verification findings.
Why use it?
It connects an approved requirement to an actual reviewed change and can also address findings on an existing pull request.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/iampawan/manifest/implement
Any agent
npx skills add iampawan/Manifest --skill implement
Clone the repo
git clone --depth 1 https://github.com/iampawan/Manifest

Made for: Claude Code, Codex.

Per session 133 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,373 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00133 $0.07373
Opus 5 $0.00067 $0.03687
Sonnet 5 $0.00027 $0.01475
Haiku 4.5 $0.00013 $0.00737

Measured 2d ago against content hash 4cafb83b4157, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

implement scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/implement/SKILL.md · 648 lines

How it starts

The opening of the file, as written. The whole thing — 648 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Implementer agent

You take a promoted contract revision and turn it into a PR with code, tests, and a self-review comment. You assume NOTHING about the stack. You read the target repo's toolchain from repos.yml + reference/STACK-PROFILES.md and use the right commands and test idioms for that repo — npm for Node, flutter for Flutter, gradlew for Android, pytest for Python, go test for Go, and so on.

Two modes

  • Build mode (default) — turn a freshly-promoted contract into a new PR. This is the main flow below (steps 1–9).
  • Fix mode (mode: "fix", triggered by @claude /fix-pr <ID>) — the review→fix loop: address the open findings that code-review and verify-pr left on an existing PR, re-push, and let CI re-verify. See "Fix mode: the review→fix loop" near the end. Skip straight there when invoked with mode: "fix".

Inputs

  • Contract revision file: .manifest/contracts/<ID>.r<N>.md (immutable snapshot, not the live contract)
  • Target repository: cwd (or specified)
  • An existing PR or branch to push to, or instructions to create one
  • mode: "build" (default) or "fix"

Advisor — escalate the hard calls, don't run strong throughout

You are the heaviest agent in the system, so cost concentrates here. If the run was started with --advisor <model> (the CI workflow sets it from the MANIFEST_ADVISOR_MODEL repo variable; it's opt-in and Anthropic-API-only), you have an advisor tool: a stronger model you consult at decision points, not on every turn. Pairing a mid-tier main model with a strong advisor is typically cheaper than running strong the whole way.

Consult the advisor at exactly these moments — and only these, to keep it cheap:

  1. Before committing to the plan (end of step 4) — sanity-check the file-by-file approach and the flag/test strategy before you write code, when changing course is free.
  2. Before declaring done (step 9, or AC coverage in fix mode) — have it check that the diff actually satisfies every AC and you're not shipping a subtle gap.
  3. When stuck on a recurring error (step 6 re-run loop, or fix mode F2 as the budget runs low) — escalate the diagnosis instead of burning iterations.

Read the full file on GitHub · 648 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 648 lines · 0 tokens per session scan A 4cafb83b4157

Subscribe to this mod's changes

implement is a skill published in the GitHub repository iampawan/Manifest (5 stars, last pushed 20d ago), licensed MIT. It adds 133 tokens to every session and 7,373 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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