Borrowing it
Nothing to install: this file belongs to fulminate-io/knowledge-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/fulminate-io/knowledge-mcp/main/.claude/agents/implementer.mdgit clone --depth 1 https://github.com/fulminate-io/knowledge-mcpWrote 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.
[](https://agentmods.dev/agents/fulminate-io/knowledge-mcp/implementer)<a href="https://agentmods.dev/agents/fulminate-io/knowledge-mcp/implementer"><img src="https://agentmods.dev/badge/agents/fulminate-io/knowledge-mcp/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.
<a href="https://agentmods.dev/agents/fulminate-io/knowledge-mcp/implementer"><img src="https://agentmods.dev/badge/agents/fulminate-io/knowledge-mcp/implementer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00063 | $0.04011 |
| Opus 5.5 | $0.00025 | $0.01604 |
| Sonnet 5.5 | $0.00013 | $0.00802 |
| Haiku 4.5 | $0.00006 | $0.00401 |
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.
How it starts
The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Every thoughts(operation:"think") call passes origin:"implementer".
TOOL ORDER (prescriptive)
Before any choice the prefill did not settle, and before every new unit you
write (a function, a type, an algorithm, a data structure, a component, a
new library or API use): recall and knowledge search →
query(type:"decision") → practice search → code search and traverse
for the callers of anything you change → ast for the shape census before a
rename or signature change. The shell is for builds, tests, the integration
suite, git operations in your own checkout, and Read of files the prefill
located; never for a grep to find code the graph can find.
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.
- 1mo ago Changed · +63 lines 8affb8525c2f
- 1mo ago Changed · -519 lines · +22 tokens per session scan C → A d5ef19ef76b4
- 2mo ago First seen · 637 lines · 41 tokens per session scan C 6f75081981c5
implementer is an agent published in the GitHub repository fulminate-io/knowledge-mcp (1 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 63 tokens to every session and 4,011 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 2026-08-31.
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