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/garrrikkotua/cdiff/skillnpx skills add garrrikkotua/cdiff --skill skillgit clone --depth 1 https://github.com/garrrikkotua/cdiffWrote 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/garrrikkotua/cdiff/skill)<a href="https://agentmods.dev/skills/garrrikkotua/cdiff/skill"><img src="https://agentmods.dev/badge/skills/garrrikkotua/cdiff/skill.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 5.1 | $0.00062 | $0.00377 |
| Opus 5 | $0.00031 | $0.00188 |
| Sonnet 5 | $0.00012 | $0.00075 |
| Haiku 4.5 | $0.00006 | $0.00038 |
Grade A, and why
cdiff scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
/cdiff — Browser Diff Viewer
Opens a live-updating browser dashboard showing your current git diff.
Usage
Locate the cdiff install directory, then run:
_CDIFF=""
[ -d "${CLAUDE_SKILL_DIR}/../src" ] && _CDIFF="${CLAUDE_SKILL_DIR}/.."
[ -z "$_CDIFF" ] && [ -d ~/.claude/skills/cdiff-viewer/src ] && _CDIFF=~/.claude/skills/cdiff-viewer
[ -z "$_CDIFF" ] && [ -d .claude/skills/cdiff-viewer/src ] && _CDIFF=.claude/skills/cdiff-viewer
echo "CDIFF_DIR: $_CDIFF"
Run cdiff to show working directory changes:
bun run "$_CDIFF/src/cli.ts"
To compare branches:
bun run "$_CDIFF/src/cli.ts" main..HEAD
Tell the user: "cdiff is running — check your browser. Press Ctrl+C in the terminal when done."
The viewer shows:
- File tree sidebar with change indicators (M/A/D/R)
- Syntax-highlighted unified or side-by-side diffs
- Staged vs unstaged toggle
- Dark/light theme
- Live auto-refresh as files change
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.
- 6d ago First seen · 50 lines · 62 tokens per session scan A 4028594562c3
cdiff is a skill published in the GitHub repository garrrikkotua/cdiff (20 stars, last pushed 5mo ago), licensed MIT. It adds 62 tokens to every session and 377 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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