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/promptctl/laws/application-specnpx skills add promptctl/laws --skill application-specgit clone --depth 1 https://github.com/promptctl/lawsWhat 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 | $0.00168 | $0.00399 |
| Opus 5 | $0.00084 | $0.00199 |
| Sonnet 5 | $0.00034 | $0.00080 |
| Haiku 4.5 | $0.00017 | $0.00040 |
Grade A, and why
application-spec 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 2d 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.
What it actually says
Producing this artifact
The craft for this medium lives in references/craft.md, relative to this skill's
base directory.
- Read
references/craft.mdbefore touching the target. - Fix these before you write:
- the complete requirements, in the requester's own words
- the target: the repo path, or how to reach the application (command, URL, credentials) - every evidence channel available to you
- the exact output path for the spec (default: an
appspec/directory at the target root) - the acceptance criterion: an independent team holding only the spec could rebuild the application, and no sentence in the spec states a fact an outside observer of the running application could not confirm
- Write the spec against the craft.
- Read back the spec files you produced - the files themselves, not your memory of writing them - and spot-check both directions: sample surfaces for completeness, sample sentences for leaked internals. If it misses, revise until it holds.
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.
- 2d ago First seen · 26 lines · 168 tokens per session scan A 503f90ce8fd6
application-spec is a skill published in the GitHub repository promptctl/laws (4 stars, last pushed 2d ago), licensed MIT. It adds 168 tokens to every session and 399 once invoked, about $0.0008 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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