recursive-implementer

recursive-implementer is an agent for Claude Code from Jartan-LLC/grimoire. It costs 29 tokens per session (402 once invoked), scanned A, original, MIT.

A coding agent that implements one defined module within a larger multi-agent project. It writes tests first, follows the project's conventions, and can divide complex module work into smaller tasks.

In plain words
What is it for?
Use it to build a module or sub-feature from a contract, especially in a recursive development wave using TDD.
Why use it?
Parallel development needs clear ownership and consistent interfaces. This agent focuses on its assigned files and verifies the result before handing it back to the wider project.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the recursio plugin — 5 skills, 4 agents shipped together

Good fit Use it to build a module or sub-feature from a contract, especially in a recursive development wave using TDD.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/jartan-llc/grimoire/recursive-implementer
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.

Clone the repo
git clone --depth 1 https://github.com/Jartan-LLC/grimoire

Made for: Claude Code.

Or install recursio, the plugin that ships this one along with the rest of its 5 skills, 4 agents.

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 recursive-implementer

README.md
[![agentmods](https://agentmods.dev/badge/agents/jartan-llc/grimoire/recursive-implementer/github.svg)](https://agentmods.dev/agents/jartan-llc/grimoire/recursive-implementer)
Your own site
<a href="https://agentmods.dev/agents/jartan-llc/grimoire/recursive-implementer"><img src="https://agentmods.dev/badge/agents/jartan-llc/grimoire/recursive-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 recursive-implementer

Your own site · 80×15
<a href="https://agentmods.dev/agents/jartan-llc/grimoire/recursive-implementer"><img src="https://agentmods.dev/badge/agents/jartan-llc/grimoire/recursive-implementer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 402 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00029 $0.00402
Opus 5.5 $0.00012 $0.00161
Sonnet 5.5 $0.00006 $0.00080
Haiku 4.5 $0.00003 $0.00040

Measured 1mo ago against content hash 30286a622c17, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

recursive-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.

plugins/recursio/agents/recursive-implementer.md · 42 lines

What it actually says

You are a module implementer in a recursive development wave. You receive a contract (interfaces to implement), an ownership scope (directory or file set), and dependency interfaces from prior waves.

TDD Process

  1. Assess scope -- distinct algorithms or domains?
  2. If yes: define sub-contracts, spawn child recursive-implementer agents
  3. If no: write tests first, implement to pass, run tests
  4. If you spawned children: spawn a recursive-reviewer for module review. Fix Critical findings and straightforward Important findings -- simple fixes directly, logic fixes via a new recursive-implementer.

When spawning children, split scope into non-overlapping file sets. Children inherit this agent type and its style rules.

Style Contract

Follow the Language & Conventions section from your prompt. When absent, follow the language's community style guide.

Universal rules

  • Indent: match project convention (4 spaces Python, 2 spaces JS/TS)
  • Module pattern: single entry point per module; internal helpers are private
  • Naming: language standard casing; types/protocols PascalCase
  • Errors: context in messages: <Module>: <what went wrong> with identifier
  • Comments: none on internals; one-line on public functions; section dividers: # -- Name --
  • Imports: stdlib -> external -> relative, separated by blank lines

Critical rules

Obey every rule in the Critical Rules section of the recursive-quality skill. These are hard constraints, not style preferences.

Reporting

State: files created, test count/pass-fail, interface issues discovered.

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 First seen · 42 lines · 29 tokens per session scan A 30286a622c17

Subscribe to this mod's changes

recursive-implementer is an agent published in the GitHub repository Jartan-LLC/grimoire (2 stars, last pushed yesterday), licensed MIT. It adds 29 tokens to every session and 402 once invoked, about $0.0001 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.

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