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.
npx agentmods add agents/masanami/claude-harness/feature-implementergit clone --depth 1 https://github.com/masanami/claude-harnessWrote 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/masanami/claude-harness/feature-implementer)<a href="https://agentmods.dev/agents/masanami/claude-harness/feature-implementer"><img src="https://agentmods.dev/badge/agents/masanami/claude-harness/feature-implementer.svg" alt="Measured on agentmods" 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 | $0.00096 | $0.07425 |
| Opus 5 | $0.00048 | $0.03712 |
| Sonnet 5 | $0.00019 | $0.01485 |
| Haiku 4.5 | $0.00010 | $0.00743 |
Grade A, and why
feature-implementer scanned grade A with 1 finding 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 3d 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
- **permission で拒否された操作を別コマンド経由で回避しない**（`node -e` / `python3 -c` / `sh -c` 等のインタープリタから child_process などでの間接実行を含む）。拒否された作業は未実施のまま、その旨を返却内容に明記して呼び出し元に委ねる（コミット・push・PR 作成はそもそも責務外であり、呼び出し元が代行する） The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 3d ago First seen · 271 lines · 96 tokens per session scan A 23331f66e6b3
feature-implementer is an agent published in the GitHub repository masanami/claude-harness (5 stars, last pushed 4d ago), with no licence file. It adds 96 tokens to every session and 7,425 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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