implementer

implementer is a skill for Claude Code from keli-wen/agy-staff. It costs 79 tokens per session (1,011 once invoked), scanned A, original, MIT.

A task handoff tool that sends a clearly defined coding job to Google's Antigravity command-line tool, which edits the current project files and can carry out requested Git delivery.

In plain words
What is it for?
Use it to ask Antigravity to build or fix something in a Git project, including work that may need to be delivered through Git.
Why use it?
It lets you assign a focused implementation task to another coding agent instead of completing it yourself. The tool also collects the agent's result.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions Codex.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is Run this command **unsandboxed** — agy needs a localhost port and its OAuth token file, which harness sandboxes hide. In Codex, request escalated permissions fo.

Part of the agy plugin — 14 skills shipped together

Good fit Use it to ask Antigravity to build or fix something in a Git project, including work that may need to be delivered through Git.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/keli-wen/agy-staff
agentmods
npx agentmods add skills/keli-wen/agy-staff/implementer

Made for: Claude Code.

Or install agy, the plugin that ships this one along with the rest of its 14 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for implementer

README.md
[![agentmods](https://agentmods.dev/badge/skills/keli-wen/agy-staff/implementer/github.svg)](https://agentmods.dev/skills/keli-wen/agy-staff/implementer)
Your own site
<a href="https://agentmods.dev/skills/keli-wen/agy-staff/implementer"><img src="https://agentmods.dev/badge/skills/keli-wen/agy-staff/implementer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for implementer

Your own site · 80×15
<a href="https://agentmods.dev/skills/keli-wen/agy-staff/implementer"><img src="https://agentmods.dev/badge/skills/keli-wen/agy-staff/implementer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,011 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 14
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
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 5.1 $0.00079 $0.01011
Opus 5.5 $0.00032 $0.00404
Sonnet 5.5 $0.00016 $0.00202
Haiku 4.5 $0.00008 $0.00101

Measured 1mo ago against content hash 19abc60f6a73, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

implementer 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 1mo 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

skills/implementer/SKILL.md · 51 lines

How it starts

The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.

agy implementer

Hand a coding task to the agy staffer. agy edits the real working tree under its unrestricted permission profile; the companion is a thin launcher and job collector. Pass the user's requested delivery through in the task text instead of doing Git work yourself.

Locating the companion

This skill file lives at <plugin-root>/skills/implementer/SKILL.md; resolve the companion path relative to this skill directory:

node "<skill-dir>/../../companion/agy-companion.mjs" implement [flags] --prompt "task description"

Pass the user's task description verbatim via --prompt; use --prompt-file <path> or --stdin for long text.

[!IMPORTANT] Run this command unsandboxed — agy needs a localhost port and its OAuth token file, which harness sandboxes hide. In Codex, request escalated permissions for the command. Details: ../jobs/references/troubleshooting.md. (The companion passes --dangerously-skip-permissions to agy in this mode — that is the unrestricted profile working as designed.)

Workspace and delivery

  • Inside a git repository, dirty workspaces are allowed. When git status --porcelain is not clean, the companion injects a bounded pre-run status summary into the implement prompt so agy treats those paths as user-owned context.
  • Outside a git repository the companion warns that agy's edits cannot be reviewed or rolled back via git, and proceeds. Relay that warning; there is no diff to fall back on.
  • By default, agy leaves a working-tree diff. If the user explicitly asks for a commit, push, or PR, include that request verbatim in the task text and let agy do that exact Git delivery.
  • After the run, surface agy's summary and the current workspace state. Do not add your own commit/PR step unless the user separately asks you to do it.

Collecting the result

The command returns a job id. Read ../jobs/SKILL.md for result collection and recovery: dispatch, wait for the final result, then validate as needed. Do not proactively observe progress, read logs or inspect intermediate artifacts while running. Observe only when the user explicitly asks for progress; diagnose a failure or a result requiring intervention under the jobs protocol.

Read the full file on GitHub · 51 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. 1mo ago Changed 19abc60f6a73
  2. 1mo ago Changed · -2 lines ed159d504840
  3. 1mo ago Changed 8371e3af0adf
  4. 1mo ago First seen · 53 lines · 79 tokens per session scan A d31f1ad1b59c

Subscribe to this mod's changes

implementer is a skill published in the GitHub repository keli-wen/agy-staff (767 stars, last pushed yesterday), licensed MIT. It adds 79 tokens to every session and 1,011 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-30.

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