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 skills add ethanaubuchon/dossier-tradecraft --skill plan-filegit clone --depth 1 https://github.com/ethanaubuchon/dossier-tradecraftWrote 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/skills/ethanaubuchon/dossier-tradecraft/plan-file)<a href="https://agentmods.dev/skills/ethanaubuchon/dossier-tradecraft/plan-file"><img src="https://agentmods.dev/badge/skills/ethanaubuchon/dossier-tradecraft/plan-file/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/skills/ethanaubuchon/dossier-tradecraft/plan-file"><img src="https://agentmods.dev/badge/skills/ethanaubuchon/dossier-tradecraft/plan-file.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 | $0.00084 | $0.02047 |
| Opus 5.5 | $0.00034 | $0.00819 |
| Sonnet 5.5 | $0.00017 | $0.00409 |
| Haiku 4.5 | $0.00008 | $0.00205 |
Grade A, and why
plan-file 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 25d 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 — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Plan File
The plan gate in /implement's repo path: runs after repo-setup, before any implementation code. Produces a written, approval-blocked plan for the branch — coding doesn't start until the plan file exists and the user has approved it. Ported from the work implementation-plan skill, genericized.
When to invoke
Before writing any implementation code, once both are true:
- A branch + worktree are set up (via
repo-setup). - A story/ticket is the agreed scope for the session.
If implementation is requested and no plan file exists for the current branch, run this first.
When to skip
Skip only for:
- Single-line fixes, typos, renames, trivial string edits.
- Emergency hotfixes where speed outweighs discipline.
- Spikes or throwaway experiments explicitly flagged as such.
If skipping, state the reason in one sentence before proceeding, so the skip is auditable in the session log (and note it in the eventual commit message).
Plan file location
.claude/plans/<branch>.md in the worktree root. Flatten / in the branch name to - so the plan is a single file, not a nested path: feat/new-thing → .claude/plans/feat-new-thing.md. This /→- rule is canonical here; repo-setup's plan-file prune and cleanup-artifacts' deletion must use the same flattening.
The plan is working scaffolding, not shipped documentation, so .claude/plans/ must be ignored by git — don't assume it. Before writing the plan, from the worktree root, check git check-ignore -q .claude/plans/<flattened-branch>.md (exit 0 = ignored, 1 = not ignored; anything else is an error — stop and surface it). If it isn't ignored, add .claude/plans/ to the repo-local exclude file rather than editing the tracked .gitignore, using repo-setup step 0's two-command snippet (canonical) with .claude/plans/ as the only pattern, then re-run the check — if it still isn't ignored, a tracked .gitignore rule (e.g. !.claude/plans/) is overriding the exclude; stop and surface it. The exclude file is shared by every worktree and never shows up in a diff. A worktree-isolated session refuses writes into the main checkout's .git, so if the append is refused, stop and give the user the exact command to run themselves (e.g. via ! <command>) — don't fall back to editing .gitignore.
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.
- 25d ago Changed · +3 lines 99e9e65ec43e
- 1mo ago Changed · +13 lines e5f2c21c991b
- 1mo ago First seen · 109 lines · 84 tokens per session scan A 5b19718effb5
plan-file is a skill published in the GitHub repository ethanaubuchon/dossier-tradecraft (3 stars, last pushed 8d ago), licensed MIT. It adds 84 tokens to every session and 2,047 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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