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/a554b554/reactant/editnpx skills add a554b554/Reactant --skill editgit clone --depth 1 https://github.com/a554b554/ReactantWhat 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 | $0.00014 | $0.00541 |
| Opus 5 | $0.00007 | $0.00270 |
| Sonnet 5 | $0.00003 | $0.00108 |
| Haiku 4.5 | $0.00001 | $0.00054 |
Grade A, and why
edit 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 2d 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 — 48 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Edit
Apply the edit described in the prompt to the surrounding text.
Input
- File path: the file being processed.
- Surrounding text: the paragraph or block where the
<@edit: ...>tag appears. - Prompt: what to change (e.g., "make it more concise", "rewrite in formal tone").
Workflow
- Read the surrounding text. Read the full file if you need broader context.
- Apply the edit as described in the prompt.
- Write the result back to the file: replace the surrounding text (including the
<@edit: ...>tag) with the edited text.
Scope Modifiers
The surrounding text may contain scope modifier tags that control which regions you can edit.
- Protect
<< >>: Text inside<<and>>must NOT be modified. Preserve it exactly as-is. Remove the<<>>delimiters in the output, but keep the content unchanged. - Field
(( )): ONLY the text inside((and))may be modified. The surrounding text is context only — do not change it. Remove the(())delimiters in the output.
If neither modifier is present, the entire surrounding text is editable (default behavior).
Context References
The prompt may contain context references wrapped in double backticks ( ``). These point to external resources (file paths, section titles, etc.) that you should look up.
- As input: Read the referenced resource and use it as additional context when applying the edit. E.g.,
<@edit: revise to connect with ``intro.md``>— readintro.mdand use its content to inform your edit. - As output: Write results to the referenced destination. E.g.,
<@edit: extract this into ``appendix.md``>— write the extracted content toappendix.md. - Resolve references relative to the source file's directory unless an absolute path is given.
- Remove the
Rules
- Only change what the prompt asks for.
- Preserve meaning unless instructed otherwise.
- Respect scope modifiers: never edit protected regions, only edit field regions when present.
- Resolve all context references (
- The
<@edit: ...>tag and all modifier delimiters (<< >>,(( )),
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.
- 2d ago First seen · 48 lines · 14 tokens per session scan A ea13bfbcaa2b
edit is a skill published in the GitHub repository a554b554/Reactant (54 stars, last pushed 29d ago), licensed MIT. It adds 14 tokens to every session and 541 once invoked, about $0.0001 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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