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/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/fulminate-io/knowledge-mcp/write-a-brief"><img src="https://agentmods.dev/badge/skills/fulminate-io/knowledge-mcp/write-a-brief.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 | $0.00061 | $0.01173 |
| Opus 5.5 | $0.00024 | $0.00469 |
| Sonnet 5.5 | $0.00012 | $0.00235 |
| Haiku 4.5 | $0.00006 | $0.00117 |
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 1mo 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 — 99 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
A brief is a decision, not a relay
A brief is where the orchestrator's reading of the situation becomes a lane's instructions. It is written after the return protocol, never from a report's summary line. If you cannot say in one sentence what this brief is for and what it demands that the situation requires, you are not ready to write it.
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.
The brief that opens a round states the sha the round is measured on and is the only message that may instruct a rebase. A brief that opens a fix round says: the report that declares the round done follows the round's one commit and is the hand-off; an unfinished item is stated in that report, never committed after it; the implementer never pushes, the orchestrator does.
Standing lines in every brief
- The artifact ids (ticket, prefill, commit) and the tree and branch to work at.
- Every finding, annotation, decision and ticket id in a brief is copied in full from a graph read you made for this brief, never transcribed from a report's prose. A prefix or a relayed id sends an auditor to resolve a mismatch instead of auditing.
- The name of a landed artifact (a manifest, a contract file, a schema) is relayed only after you opened it on the landed tree; a sibling lane's report of its spelling is not the artifact.
- 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 own standing test and commit rules, quoted from where the repository states them.
- Any single operation projected over fifteen minutes is named before it runs.
- The report's size bound and the order of its contents, with the verdict, the ids and the not-done list first, so a report truncated in transit still carries what the next decision needs.
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.
- 1mo ago Changed · +48 lines · +12 tokens per session 202c53aa8a9a
- 1mo ago Changed · -11 lines 9e6164355583
- 1mo 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 1mo ago), licensed Apache-2.0. It adds 61 tokens to every session and 1,173 once invoked, about $0.0002 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 2026-09-04.
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