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/skills/write-a-brief/SKILL.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/skills/fulminate-io/knowledge-mcp/write-a-brief)<a href="https://agentmods.dev/skills/fulminate-io/knowledge-mcp/write-a-brief"><img src="https://agentmods.dev/badge/skills/fulminate-io/knowledge-mcp/write-a-brief.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 5.1 | $0.00049 | $0.00554 |
| Opus 5 | $0.00024 | $0.00277 |
| Sonnet 5 | $0.00010 | $0.00111 |
| Haiku 4.5 | $0.00005 | $0.00055 |
Grade A, and why
write-a-brief 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.
How it starts
The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.
WRITE-A-BRIEF — everything load-bearing goes in before the spawn
Discovery, never confirmation
A research brief names the problem and asks what already exists; it never names a solution. An investigation brief carries the observation (what ran, what it returned, on which tree and plane) and the instruments; it never carries a candidate mechanism. A planning brief names the ticket and the tree; it never names a design. If your brief contains a mechanism you have not reproduced or a design the user has not decided, you have poisoned the lane.
Front-load everything
A lane reads its mailbox only between turns and consumes queued messages after its current work, so a mid-flight correction is a note found later, maybe never acted on, and a message to an idle lane resumes it. Everything load-bearing goes into the spawn prompt. A post-spawn correction is a re-spawn, or a follow-up sent only after the lane's idle notice with the lane then treated as live again.
Standing lines in every brief
- The artifact ids (ticket, prefill, commit) and the tree and branch to work at.
- ABSOLUTE PATHS for every read, build and run; a persistent shell cwd drifts.
- The user's load-bearing rules (money, access, security, data handling, scope) as VERBATIM QUOTES, with your interpretation beside the quote, labeled yours.
- The isolation rule: tests and probes run against spawned services on picked ports with an isolated home; the operator's running services, stores and credentials are never restarted, reconfigured or written into.
- The reads to stamp, always including
.claude/skills/knowledge-tools/SKILL.md, and the line that the report ends with a tool census. - Sibling work in flight on the same branch, with its touched files.
- The repository's standing test rules (no forced re-run flags, no private build caches, no git identity changes, hooks never bypassed).
- Any single operation projected over fifteen minutes is named before it runs.
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 · -11 lines 9e6164355583
- 3d ago First seen · 62 lines · 49 tokens per session scan A 30f9e6b70e61
write-a-brief is a skill published in the GitHub repository fulminate-io/knowledge-mcp (1 stars, last pushed yesterday), licensed Apache-2.0. It adds 49 tokens to every session and 554 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 2026-09-04.
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