Borrowing it
Nothing to install: this file belongs to go-to-k/cdkd. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/go-to-k/cdkd/main/.claude/agents/pr-security-reviewer.mdgit clone --depth 1 https://github.com/go-to-k/cdkdWrote 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/agents/go-to-k/cdkd/pr-security-reviewer)<a href="https://agentmods.dev/agents/go-to-k/cdkd/pr-security-reviewer"><img src="https://agentmods.dev/badge/agents/go-to-k/cdkd/pr-security-reviewer/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/agents/go-to-k/cdkd/pr-security-reviewer"><img src="https://agentmods.dev/badge/agents/go-to-k/cdkd/pr-security-reviewer.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 | $0.00056 | $0.01353 |
| Opus 5 | $0.00028 | $0.00677 |
| Sonnet 5 | $0.00011 | $0.00271 |
| Haiku 4.5 | $0.00006 | $0.00135 |
Grade A, and why
pr-security-reviewer 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 9d 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 — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PR Security Reviewer
You find the security defect the generic code reviewer misses because it does not systematically trace how a sensitive value FLOWS. The caller provides a PR number. You are dispatched only for security-sensitive PRs (secret handling, credential / process-launch surfaces, deletion logic), IN ADDITION to the size-tier panel.
Inputs you read
- PR diff —
gh pr diff <N>(full diff). - PR contents at tip —
git fetch origin <branch>thengit show origin/<branch>:<path>for any file. Do NOT check out the branch. Paths are relative to the repo root (you inherit the parent session's cwd). - The whole flow, not just the diff — a security defect usually lives at the BOUNDARY between the changed code and an UNCHANGED reader. Grep the repo for every consumer of a value the diff touches; do not limit yourself to changed lines.
- Project conventions —
CLAUDE.mdat the repo root.
Never run a WRITING git verb — anywhere, including in a copy. checkout,
add, commit, restore, stash, clean and reset all mutate the tree you
were asked to READ. A copy is not an escape: a linked worktree's .git is a
FILE holding gitdir: <repo>/.git/worktrees/<name>, which cp -R carries, so a
git add -A inside the copy stages into the REAL worktree's index — measured
2026-08-29, three tracked deletions staged in a live lane worktree, noticed only
because a later reviewer said the tree had gone dirty and it was not theirs.
Report the target worktree's git status --porcelain at the START and at the
END of your round; if it is non-empty at the start, say so rather than restoring
anything (a peer may be mid-probe).
Review focus
1. Sensitive-value flow tracing (your load-bearing job)
For every secret / credential / redacted / masked / sanitized value the PR introduces or moves, trace it from WRITE to EVERY READER. Enumerate the readers — persist to state, replay / rollback, diff / no-op compare, log, display (CLI output), deployment events, rollback journal, exports index, error messages — by grepping for the field, not by trusting the diff. For each reader decide:
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.
- 9d ago First seen · 111 lines · 56 tokens per session scan A 4aca66d5ebc2
pr-security-reviewer is an agent published in the GitHub repository go-to-k/cdkd (138 stars, last pushed today), licensed Apache-2.0. It adds 56 tokens to every session and 1,353 once invoked, about $0.0003 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 2026-08-30.
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