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 ljucask/pureinn-product-development --skill pm-scope-briefgit clone --depth 1 https://github.com/ljucask/pureinn-product-developmentWrote 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/ljucask/pureinn-product-development/pm-scope-brief)<a href="https://agentmods.dev/skills/ljucask/pureinn-product-development/pm-scope-brief"><img src="https://agentmods.dev/badge/skills/ljucask/pureinn-product-development/pm-scope-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/ljucask/pureinn-product-development/pm-scope-brief"><img src="https://agentmods.dev/badge/skills/ljucask/pureinn-product-development/pm-scope-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 | $0.00110 | $0.03283 |
| Opus 5 | $0.00055 | $0.01641 |
| Sonnet 5 | $0.00022 | $0.00657 |
| Haiku 4.5 | $0.00011 | $0.00328 |
Grade A, and why
pm-scope-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 12d 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 — 262 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PM - Scope Brief
Agent mode (--agent)
Supports --agent: runs autonomously in a subagent, drafts the artifact from existing inputs, and returns a short summary + coverage note.
- No flag → interactive (default); if inputs are heavy, offer agent mode.
--agent→ obey. First check inputs are complete. Anything missing: do NOT invent it - mark[ASSUMED - what/why]in the output and summary. Never hallucinate to fill a gap.- Review required: the artifact contains commitments - the IN/OUT/DEFERRED scope cut is decided here for the first time. After drafting, require the user's review before finalizing; never close scope decisions autonomously.
What this skill does
Turns converged discovery into a definition: what exactly gets built. Written for whoever executes - you, your dev team, your employer - and precise enough to run a dev kickoff call from. It is the document a developer reads instead of "make it like company XY".
When Scope Brief, when PRD: both fill the same Phase 3b exit slot - pick one.
| Situation | Document |
|---|---|
| Mandate already given: a client commissioned it, an exec directed it, the decision to build is made | Scope Brief (this skill). Phase 3a validation and business-model work would re-answer a question that's already answered. |
| Speculative product: you're deciding whether/what to build, market risk is yours | PRD via full Phase 3a + 3b (/pm-prd). Skipping validation there is skipping your own risk management. |
Context fit check (surface before generating): if no committed mandate exists - nobody has decided this gets built - say so: "Scope Brief presumes a given mandate. For a speculative product, /pm-hypotheses → /pm-prd is the honest path. Proceed anyway?"
Downstream contract: the Business Capabilities section of this document is a named interface - /pm-entity-registry extracts entities from it and /pm-features-list derives the feature inventory from it, exactly as they do from PRD Section 7. Everything else in the brief supports that core.
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.
- 12d ago First seen · 262 lines · 110 tokens per session scan A 1e126fdb93bb
pm-scope-brief is a skill published in the GitHub repository ljucask/pureinn-product-development (2 stars, last pushed 2d ago), licensed MIT. It adds 110 tokens to every session and 3,283 once invoked, about $0.0006 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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