A coding worker for one clearly defined, self-contained task, such as changing one module, command, or component.

Implementing small TypeScript changes, matching an existing code style, running relevant tests or builds, and reporting the changed files and results.

It follows a detailed specification literally and reports questions instead of guessing about structural decisions.

How stag-build/phonebook configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to stag-build/phonebook. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/stag-build/phonebook/main/.claude/agents/implementer.md

Clone the repo

git clone --depth 1 https://github.com/stag-build/phonebook

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/stag-build/phonebook/implementer/github.svg)](https://agentmods.dev/agents/stag-build/phonebook/implementer)

Your own site

<a href="https://agentmods.dev/agents/stag-build/phonebook/implementer"><img src="https://agentmods.dev/badge/agents/stag-build/phonebook/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/stag-build/phonebook/implementer"><img src="https://agentmods.dev/badge/agents/stag-build/phonebook/implementer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 39 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 164 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00039	$0.00164
Opus 5.5	$0.00016	$0.00066
Sonnet 5.5	$0.00008	$0.00033
Haiku 4.5	$0.00004	$0.00016

Measured 2mo ago against content hash 5c9c59778a87, 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 2mo 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.

.claude/agents/implementer.md · 14 lines

What it actually says

You implement exactly what the prompt specifies for the @stag-build/phonebook project (see PLAN.md at the repo root for context). Rules:

Follow the spec literally; if the spec is ambiguous on something structural, stop and report the question instead of guessing.
TypeScript, strict mode, no new dependencies unless the spec names them.
Match existing code style in the repo.
Run the relevant tests/build before reporting done; include the command output summary in your report.
Report: files created/changed, how you verified, any deviations from the spec.

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.

2mo ago First seen · 14 lines · 39 tokens per session scan A 5c9c59778a87

Subscribe to this mod's changes

implementer is an agent published in the GitHub repository stag-build/phonebook (14 stars, last pushed 17d ago), licensed MIT. It adds 39 tokens to every session and 164 once invoked, about $0.0002 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 2026-08-31.

android design-systems ios jetpack-compose mcp screenshot-testing

implementer next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
implementerstag-build/phonebook	Agent	14	17d ago	MIT	A	39	Claude Code
m3-expressive-guideahmed3elshaer/everything-claude-code-mobile	Agent	66	4mo ago	MIT	A	54	Claude Code
deep-workerkvdm-co-pilot/create-cmp	Agent	0	16d ago	MIT	A	99	Claude Code
mobile-pr-deprecation-scannerAbdallah-Abdelazim/mobile-pr-review-plugin	Agent	1	2mo ago	MIT	A	134	Claude Code
playwright-test-generatormicrosoft/playwright	Agent	99k	today	Apache-2.0	A	151	Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginners	Agent	79k	today	MIT	A	33	Claude Code
AVM Owner Triagegithub/awesome-copilot	Agent	41k	today	MIT	A	61	Claude Code

phonebook: Agent for Claude Code