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/yarlson/yarstack/phase-reviewnpx skills add yarlson/yarstack --skill phase-reviewgit clone --depth 1 https://github.com/yarlson/yarstackWrote 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/yarlson/yarstack/phase-review)<a href="https://agentmods.dev/skills/yarlson/yarstack/phase-review"><img src="https://agentmods.dev/badge/skills/yarlson/yarstack/phase-review.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 | $0.00032 | $0.00297 |
| Opus 5 | $0.00016 | $0.00148 |
| Sonnet 5 | $0.00006 | $0.00059 |
| Haiku 4.5 | $0.00003 | $0.00030 |
Grade A, and why
phase-review 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 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.
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
Phase Structural Review
Own a narrow maintainability pass after correctness has been established.
Workflow
- Read the selected contract, applicable repository rules, final diff, and changed units.
- Identify only complexity, duplication, unclear ownership, loose types, or unnecessary indirection introduced or materially worsened by the selected change.
- Use
crap-index-assesswhen the repository's configured CRAP check covers changed methods or the phase was intended to reduce their CRAP risk. Treat score changes as supporting evidence, not a structural verdict. - Fix a finding only when the parent implementation request authorizes scoped edits and the correction is clearly behavior-preserving.
- Report a worthwhile correction when it requires non-trivial restructuring or broader authority; do not expand scope during the review.
- Rerun affected checks after every edit.
Correctness belongs to phase-validate; general read-only defect review to code-review; test sufficiency to test-gap-review; documentation accuracy to docs-drift-review; and specialized risks to their owning reviewers.
Do not add behavior, pursue unrelated cleanup, use subjective file-size thresholds, or continue until no imaginable simplification remains.
Finish when structural regressions introduced by the change are fixed or reported with their scope and risk.
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 · 24 lines · 32 tokens per session scan A c2998eb3d424
phase-review is a skill published in the GitHub repository yarlson/yarstack (3 stars, last pushed 7d ago), licensed MIT. It adds 32 tokens to every session and 297 once invoked, about $0.0002 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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