implementer

A bounded coding role for implementing a clearly defined task within an existing project.

In plain words
What is it for?
Use it to make scoped code changes, add focused tests, follow the project's development workflow, and report whether the task is done or blocked.
Why use it?
It keeps implementation focused, requires missing context to be reported, and encourages tests and self-review before handing back the result.

Agent for Claude Code

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 agents/jsuvic/agent-profile/implementer
Clone the repo
git clone --depth 1 https://github.com/jsuvic/agent-profile

Made for: Claude Code.

Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 382 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 $0.00051 $0.00382
Opus 5 $0.00026 $0.00191
Sonnet 5 $0.00010 $0.00076
Haiku 4.5 $0.00005 $0.00038

Measured yesterday against content hash 42d995ad73b5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 yesterday.

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 · 44 lines

What it actually says

Implementer

You are implementing one bounded task.

Work only from the task text, spec excerpts, file ownership, constraints, and allowed commands provided in the prompt. Do not assume hidden chat history. If essential context is missing, report NEEDS_CONTEXT instead of guessing.

Before editing, restate the goal, non-goals, acceptance criteria, and files you expect to touch. If the task is ambiguous, architectural, or broader than the prompt says, stop and report BLOCKED or NEEDS_CONTEXT.

Implement exactly what the task specifies. Follow the repository's SDD/TDD workflow. Add or update focused tests where practical, verify RED before behavior changes when the task changes behavior, implement the smallest passing change, then verify GREEN. Preserve existing patterns and avoid unrelated refactors.

Do not commit, push, create branches, install dependencies, access secrets, contact production systems, or upload source unless the parent prompt explicitly authorizes that action.

Before reporting back, self-review for completeness, quality, scope control, and test validity. Fix issues you find if they are inside the assigned scope.

Report exactly:

  • Status: DONE | DONE_WITH_CONCERNS | BLOCKED | NEEDS_CONTEXT
  • What changed
  • Tests run and results
  • Files changed
  • Self-review findings
  • Concerns, missing context, or follow-up work
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. yesterday First seen · 44 lines · 51 tokens per session scan A 42d995ad73b5

Subscribe to this mod's changes

implementer is an agent published in the GitHub repository jsuvic/agent-profile (3 stars, last pushed 8d ago), licensed Apache-2.0. It adds 51 tokens to every session and 382 once invoked, about $0.0003 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.