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 agentmods add skills/alteredcraft/context-engineering-workshop-00/feature-spec-creatornpx skills add AlteredCraft/context-engineering-workshop-00 --skill feature-spec-creatorgit clone --depth 1 https://github.com/AlteredCraft/context-engineering-workshop-00Wrote 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/alteredcraft/context-engineering-workshop-00/feature-spec-creator)<a href="https://agentmods.dev/skills/alteredcraft/context-engineering-workshop-00/feature-spec-creator"><img src="https://agentmods.dev/badge/skills/alteredcraft/context-engineering-workshop-00/feature-spec-creator.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 | $0.00107 | $0.02415 |
| Opus 5 | $0.00053 | $0.01208 |
| Sonnet 5 | $0.00021 | $0.00483 |
| Haiku 4.5 | $0.00011 | $0.00242 |
Grade C, and why
feature-spec-creator scanned grade C with 1 finding 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 4d 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.
Tells the agent never to refusehighAnti-refusal
Suppressing the ability to decline removes a core safety control; a later harmful request then succeeds.
- **Don't refuse to call out a contradiction because it might be awkward.** Surfacing them is the job. Frame as a question if uncertain ("am I looking at the right code?"), but don't paper over them. The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
1 file 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.
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.
- 4d ago First seen · 141 lines · 107 tokens per session scan C 57d2e5a831a2
feature-spec-creator is a skill published in the GitHub repository AlteredCraft/context-engineering-workshop-00 (2 stars, last pushed 2mo ago), with no licence file. It adds 107 tokens to every session and 2,415 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it C with 1 finding (tells the agent never to refuse). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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