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/phnpx skills add a554b554/Reactant --skill phgit 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 | $0.00465 |
| Opus 5 | $0.00007 | $0.00233 |
| Sonnet 5 | $0.00003 | $0.00093 |
| Haiku 4.5 | $0.00001 | $0.00047 |
Grade A, and why
ph 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.
What it actually says
Placeholder
Generate content that fits naturally at the tag position.
Input
- File path: the file being processed.
- Surrounding text: the paragraph or block where the
<@ph>tag appears. - Prompt (optional): hint about what to fill (e.g., "a transition sentence"). Default: infer from context.
Workflow
- Read the surrounding text before and after the tag. Read the full file if you need broader context.
- Generate content that fits naturally at that position in tone, style, and meaning.
- Write the result back to the file: replace the
<@ph>tag with the generated text.
Scope Modifiers
The surrounding text may contain scope modifier tags. Since <@ph> replaces only the tag itself (not surrounding content), scope modifiers primarily provide context:
- Protect
<< >>: Protected text is context only — do not modify it. Remove the<<>>delimiters in the output. - Field
(( )): If the<@ph>tag appears inside a field, generate content within that field only. Remove the(())delimiters in the output.
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.
- Read the referenced resource and use it to inform the generated content. E.g.,
<@ph: a summary sentence based on ``results.md``>— readresults.mdto generate an appropriate placeholder. - Resolve references relative to the source file's directory unless an absolute path is given.
- Remove the
Rules
- Output should read as if it was always part of the text.
- Keep it concise and contextually appropriate.
- Respect scope modifiers if present.
- Resolve all context references (
- The
<@ph>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 · 44 lines · 14 tokens per session scan A 0d2ea1b56ae5
ph 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 465 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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