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/fy-agent/fyagent/trellis-implementgit clone --depth 1 https://github.com/fy-agent/fyagentWhat 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 | $0.00051 | $0.00797 |
| Opus 5 | $0.00026 | $0.00398 |
| Sonnet 5 | $0.00010 | $0.00159 |
| Haiku 4.5 | $0.00005 | $0.00080 |
Grade A, and why
trellis-implement 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.
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.
- yesterday First seen · 110 lines · 51 tokens per session scan A 636d55ebb56d
trellis-implement is an agent published in the GitHub repository fy-agent/fyagent (755 stars, last pushed yesterday), with no licence file. It adds 51 tokens to every session and 797 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 2026-08-30.
Other agents, from other repositories
testing
Where WeftCut's tests live, why they're split the way they are, and how to run each layer. There is no single tests/ directory — that's deliberate (see Why not one directory). Tests are grouped by runner, not scattered by neglect.
persona-builder
1-2ファイルの surgical 編集。typo 修正、単一関数の書き換え、機械的な rename。 3ファイル以上は拒否する。圧縮形式の diff receipt を返す。.
persona-investigator
読み取り専用のコードロケーター。定義・呼び出し元・全用法を file:line 表で返す。 出力は圧縮形式で、標準の Explore より主スレッドの消費トークンが小さい。修正提案はしない。.
persona-reviewer
Derived from genshijin (MIT, InterfaceX-co-jp) — https://github.com/InterfaceX-co-jp/genshijin.
heavy-implementer
Implement large or uncertain changes that span multiple files or require debugging and trial-and-error. Use when the work is substantial enough that an isolated context with its own iteration loop pays off.
code-explore
Broad, read-only code investigation and reference tracing. Use when answering a question means sweeping many files, directories, or naming conventions and you only need the conclusion — not to edit code. Returns findings as filepath:linenumber references.