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/augchan42/inkstone/codex-reviewnpx skills add augchan42/inkstone --skill codex-reviewgit clone --depth 1 https://github.com/augchan42/inkstoneWrote 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/augchan42/inkstone/codex-review)<a href="https://agentmods.dev/skills/augchan42/inkstone/codex-review"><img src="https://agentmods.dev/badge/skills/augchan42/inkstone/codex-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 | $0.00108 | $0.02252 |
| Opus 5 | $0.00054 | $0.01126 |
| Sonnet 5 | $0.00022 | $0.00450 |
| Haiku 4.5 | $0.00011 | $0.00225 |
Grade B, and why
codex-review scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
CODEX_CONFIG="${HOME}/.codex/config.toml" && if [ ! -f "$CODEX_CONFIG" ]; then mkdir -p "${HOME}/.codex" && printf '[features]\nmulti_agent = true\n' > "$CODEX_CONFIG" && echo "Created ~/.codex/config.toml with multi_age How it starts
The opening of the file, as written. The whole thing — 202 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Codex Review
An independent code review of a scope you choose, not a scope some tool chose for you.
Core principle: the reviewer must not have seen the conversation that produced the code. Its value is that it does not already believe the change is correct. Preserve that — never hand it your reasoning, only the diff.
No hook, no state file, no loop. This skill runs start-to-finish inside one invocation. Nothing can wedge a session, and nothing needs cancelling.
Lifecycle
resolve scope → assemble lanes → run reviewer → triage findings → act
Phase 1 — Resolve the scope
Run the resolver and use its output. Do not construct a git diff by hand.
"${CLAUDE_PLUGIN_ROOT:-.}/skills/codex-review/scripts/resolve-scope.sh" <args>
Pass the user's scope arguments through unchanged, minus --focus and --holistic
(those are yours, not the resolver's). It emits SCOPE_LABEL, DIFF_ARGS,
PATHSPEC, REF_SHA, CHANGED_FILES, CHANGED_LINES, OVERSIZED.
| The user says | Resolves to |
|---|---|
| nothing | dirty tree → git diff HEAD; else branch vs merge-base with the default branch; else the last commit |
HEAD~3 |
everything since that ref |
<sha> <sha> or a..b |
that range |
| a merge commit sha | git diff <sha>^1 <sha> — detected automatically |
--commit <sha> |
that one commit alone |
--pr 140 |
the PR's base..head (needs gh) |
--staged / --uncommitted |
index / working tree |
| trailing paths | pathspec-limits any of the above |
Echo SCOPE_LABEL to the user before running the review. A review of the wrong
range is worse than no review, because it reads as clean.
If OVERSIZED=true (default threshold 2000 changed lines): say so, and offer to
split by directory rather than proceeding. A reviewer given more than it will read
carefully returns confident shallow findings.
If the resolver warns of an empty scope, stop and resolve that first — it is almost always a reversed range or an over-narrow pathspec.
What ships with it
2 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.
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 · 202 lines · 108 tokens per session scan B 4a1a1146588c
codex-review is a skill published in the GitHub repository augchan42/inkstone (4 stars, last pushed 8d ago), licensed MIT. It adds 108 tokens to every session and 2,252 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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