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/mpecan/tokf/codex-runnpx skills add mpecan/tokf --skill codex-rungit clone --depth 1 https://github.com/mpecan/tokfWrote 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/mpecan/tokf/codex-run)<a href="https://agentmods.dev/skills/mpecan/tokf/codex-run"><img src="https://agentmods.dev/badge/skills/mpecan/tokf/codex-run.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 | $0.00039 | $0.00601 |
| Opus 5 | $0.00019 | $0.00300 |
| Sonnet 5 | $0.00008 | $0.00120 |
| Haiku 4.5 | $0.00004 | $0.00060 |
Grade A, and why
tokf-run 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 3d 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 — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.
tokf — Token Output Filter
tokf compresses verbose command output so you receive concise, structured results instead of raw terminal dumps. It saves context tokens and makes output easier to reason about.
Rule
When the tokf Codex hook is installed, run supported commands normally. The hook rewrites matching commands to tokf run <command> before execution.
If the hook is unavailable, blocked, or not rewriting a supported command, use the manual fallback:
tokf run <command>
Examples:
tokf run git status
tokf run cargo test
tokf run npm test
tokf run docker ps
Supported commands
The following commands have built-in filters. The hook can rewrite them automatically; use tokf run manually only as fallback:
git status,git diff,git log,git push,git add,git commit,git showcargo build,cargo test,cargo check,cargo clippy,cargo installnpm test,npm run,yarn test,pnpm testdocker build,docker compose,docker ps,docker imagesgo build,go vetgradle build,gradle test,gradle dependenciesgh pr view,gh pr list,gh pr checks,gh issue view,gh issue listkubectl get podsnext buildpnpm add,pnpm installprisma generatepytesttscls
Commands not in this list pass through unchanged when prefixed with tokf run.
Important rules
- Never double-prefix. If a command already starts with
tokf run, do not add it again. - Arguments pass through. In manual fallback mode, include all flags and arguments after the base command:
tokf run cargo test --release -- my_test. - Fail-safe. If
tokfis not installed or not on PATH, run the command without the prefix. - Environment variables. Place env vars before
tokf run:RUST_LOG=debug tokf run cargo test. - Pipes. Do not add redundant filtering pipes (e.g.
| grep,| tail,| head) aftertokf runcommands — tokf already compresses the output. Piping tokf's output for other purposes (e.g.tokf run cargo test | wc -l) is fine.
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.
- 3d ago First seen · 57 lines · 39 tokens per session scan A ae0011088727
tokf-run is a skill published in the GitHub repository mpecan/tokf (195 stars, last pushed 6d ago), licensed MIT. It adds 39 tokens to every session and 601 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 2026-08-30.
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