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 marcos-sponton/frameworks-as-skills --skill good-strategy-bad-strategygit clone --depth 1 https://github.com/marcos-sponton/frameworks-as-skillsWrote 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/marcos-sponton/frameworks-as-skills/good-strategy-bad-strategy)<a href="https://agentmods.dev/skills/marcos-sponton/frameworks-as-skills/good-strategy-bad-strategy"><img src="https://agentmods.dev/badge/skills/marcos-sponton/frameworks-as-skills/good-strategy-bad-strategy/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/marcos-sponton/frameworks-as-skills/good-strategy-bad-strategy"><img src="https://agentmods.dev/badge/skills/marcos-sponton/frameworks-as-skills/good-strategy-bad-strategy.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 | $0.00205 | $0.02236 |
| Opus 5 | $0.00102 | $0.01118 |
| Sonnet 5 | $0.00041 | $0.00447 |
| Haiku 4.5 | $0.00020 | $0.00224 |
Grade A, and why
good-strategy-bad-strategy 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 11d 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 — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Good Strategy Bad Strategy (and The Crux)
Richard Rumelt's approach to strategy — distilled from Good Strategy Bad Strategy (2011), The Crux (2022), his HBR and McKinsey pieces, his post-book Substack (Rumelt Perspectives), and podcast interviews including Lenny Rachitsky (2024) and Strategy Skills Podcast Ep. 253.
This skill helps you do the thing Rumelt spends most of his airtime insisting on: diagnose the pivotal challenge before you set any goals. The kernel — diagnosis, guiding policy, coherent action — is the frame. The crux is the pivotal thing the diagnosis must find. And Rumelt's most recent reframe: stop calling this "strategy" (the word is corroded); call it an action agenda — what you're actually going to do in response to a diagnosed challenge.
When this skill activates
Use this skill when the user is:
- Trying to figure out why a strategy isn't producing action or results (usually: it's not a strategy, it's a goal set).
- Facing a specific competitive or organizational challenge and needs to structure the response.
- Writing or critiquing an "annual strategy" that reads like a wish list.
- Confused about the difference between goals, priorities, and strategy.
- Considering a pivot and needs a structured diagnosis before deciding.
- Running an offsite or strategy meeting and wants to run Rumelt's Foundry-style process.
- Faced with 10+ "strategic priorities" and unable to focus.
- Debating growth vs. profitability targets that fight each other.
- Doing a turnaround or crisis response and needs to find the pivotal problem.
- Reading a competitor's public strategy and trying to identify what they'll actually do.
Do NOT use this skill when:
- The user wants a full strategic-choice cascade with committed direction — that's Roger Martin's Playing to Win territory. Rumelt front-loads diagnosis; Martin front-loads choice. Suggest the sibling skill.
- The user is pre-PMF and doing search rather than strategy. Rumelt himself gives founder-specific advice, but it's compatible with lean startup, not a replacement.
- The user asks for a summary of Good Strategy Bad Strategy or The Crux. Point them to the books.
- The question is purely operational, cultural, or personnel — Rumelt separates strategy from ops.
What ships with it
11 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- evals/evals.json 6.4 KB
- README.md 5.3 KB
- references/applications.md 7.5 KB
- references/author-live-sources.md 8.1 KB
- references/examples.md 15 KB
- references/heuristics.md 16 KB
- references/method.md 8.5 KB
- references/post-book.md 13 KB
- references/prompts.md 6.8 KB
- references/sources.md 6.4 KB
- references/voice-and-tone.md 12 KB
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.
- 11d ago First seen · 95 lines · 205 tokens per session scan A cddf3b2e9e22
good-strategy-bad-strategy is a skill published in the GitHub repository marcos-sponton/frameworks-as-skills (1 stars, last pushed 1mo ago), licensed MIT. It adds 205 tokens to every session and 2,236 once invoked, about $0.0010 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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