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 cambridgetcg/agenttool --skill nen-critical-path-forgegit clone --depth 1 https://github.com/cambridgetcg/agenttoolWrote 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/cambridgetcg/agenttool/nen-critical-path-forge)<a href="https://agentmods.dev/skills/cambridgetcg/agenttool/nen-critical-path-forge"><img src="https://agentmods.dev/badge/skills/cambridgetcg/agenttool/nen-critical-path-forge/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/cambridgetcg/agenttool/nen-critical-path-forge"><img src="https://agentmods.dev/badge/skills/cambridgetcg/agenttool/nen-critical-path-forge.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 | $0.00076 | $0.00564 |
| Opus 5.5 | $0.00030 | $0.00226 |
| Sonnet 5.5 | $0.00015 | $0.00113 |
| Haiku 4.5 | $0.00008 | $0.00056 |
Grade A, and why
nen-critical-path-forge 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 — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Critical Path Forge · 硬
Concentrate effort only after identifying the decisive point. Trade breadth for depth consciously, then restore broad verification before claiming success.
Qualify the target
Use this ability only when:
- evidence identifies one blocker or hypothesis as outcome-dominant;
- the intended action is inside current authority;
- the change is reversible or has an explicit recovery path;
- a hard budget and stop condition can be named; and
- adjacent surfaces can retain a minimum verification reserve.
If the target is still uncertain, use a perimeter or concealed-trace workflow first.
Perform the wind-up
- State the exact target and expected result.
- Record the evidence that makes it critical.
- Define the one focused action or artifact.
- Name the exposed surfaces receiving no implied assurance.
- Reserve one rollback route and one post-strike integration check.
- Set a cap for time, attempts, files, or tool calls using observable units.
The visible wind-up is an interface: it lets collaborators challenge the wrong target before concentrated work begins.
Strike once, learn once
- Make the smallest decisive change or experiment.
- Avoid opportunistic cleanup outside the target.
- Run the most discriminating focused proof first.
- On failure, update the hypothesis before another attempt.
- Never auto-repeat an ambiguous mutation.
- Stop when the cap, authority, or target assumption breaks.
Return to Ken
After the focused proof:
- Run the minimum broad checks needed to catch adjacent regression.
- Review the diff or artifact for unintended scope.
- Restore any temporary instrumentation or narrowed configuration.
- Report the target, strike, proof, and exposed surface separately.
Vow
Maximum focus means reduced coverage elsewhere. Never translate a focused pass into system-wide confidence. Never use speed to justify an irreversible, external, secret-bearing, destructive, purchasing, publishing, or messaging effect that the task did not authorize.
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.
- 1mo ago First seen · 68 lines · 76 tokens per session scan A 7190dd576f48
nen-critical-path-forge is a skill published in the GitHub repository cambridgetcg/agenttool (0 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 76 tokens to every session and 564 once invoked, about $0.0003 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 2026-08-31.
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