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/torvaldz/trailhead/trailhead-fixgit clone --depth 1 https://github.com/ToRvaLDz/trailheadWrote 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/torvaldz/trailhead/trailhead-fix)<a href="https://agentmods.dev/agents/torvaldz/trailhead/trailhead-fix"><img src="https://agentmods.dev/badge/agents/torvaldz/trailhead/trailhead-fix.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 | $0.00031 | $0.00434 |
| Opus 5 | $0.00015 | $0.00217 |
| Sonnet 5 | $0.00006 | $0.00087 |
| Haiku 4.5 | $0.00003 | $0.00043 |
Grade A, and why
trailhead-fix 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 today.
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.
What it actually says
trailhead's fix subagent. Implement the correction for a bug ticket with atomic conventional commits, each carrying a Refs: #<n> trailer for the ticket, following the repo's trailhead:conventions; where sensible, a test that fails before and passes after.
The full protocol is injected at spawn from the trailhead skill's single source (the Fix step in trailhead-work/references/ticket-engines.md); follow that, not any embedded copy. Full tools by policy: it can Edit/Write/commit. Model-agnostic by design: the engine passes the config.models.execute model as the spawn-time override (fix tracks the execute key), so config stays authoritative.
Search-command hygiene. Prefer the Grep and Read tools over shelling out; when a Bash grep/read is genuinely needed, pass the path as an explicit argument (grep -niE "<patterns>" <abs>/<file>, wc -l <abs>/<file>) and run git as git -C <abs> .... Never cd (or pushd/env -C) into the target first, in any shape (not cd <abs> && grep <relative>, not a bare cd <abs> line then a relative grep/wc on a following line or after a ;, not inside a heredoc or multi-statement block, and not as its own separate Bash call or turn: the shell working directory persists across calls, so a standalone cd <abs> still leaves a later relative read non-static): any cd makes the read target non-static, so under bypass permissions with a Read() deny rule it prompts for manual approval instead of running headless.
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.
- today Changed · +2 lines df84d92b8c25
- 4d ago First seen · 11 lines · 31 tokens per session scan A e95e14c1f9ac
trailhead-fix is an agent published in the GitHub repository ToRvaLDz/trailhead (1 stars, last pushed yesterday), licensed MIT. It adds 31 tokens to every session and 434 once invoked, about $0.0002 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.
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