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 skills add a554b554/Reactant --skill execute-onegit clone --depth 1 https://github.com/a554b554/ReactantWrote 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/a554b554/reactant/execute-one)<a href="https://agentmods.dev/skills/a554b554/reactant/execute-one"><img src="https://agentmods.dev/badge/skills/a554b554/reactant/execute-one/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/skills/a554b554/reactant/execute-one"><img src="https://agentmods.dev/badge/skills/a554b554/reactant/execute-one.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 | $0.00045 | $0.01824 |
| Opus 5.5 | $0.00018 | $0.00730 |
| Sonnet 5.5 | $0.00009 | $0.00365 |
| Haiku 4.5 | $0.00005 | $0.00182 |
Grade A, and why
execute-one 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 1mo 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 — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Execute One
Execute exactly one Reactant annotation: the first actionable tag in source order. The host agent is the parser. Do not call or rely on a programmatic tag scanner, parser, AST, or dispatch classifier.
Entry and Dispatch Boundary
Reactant has three direct entry skills: execute, execute-one, and
skill-generator. The first two are document routers. skill-generator is a
direct project-authoring utility, has no inline tag form, and is never
dispatched by a router. All remaining Reactant skills are tag-only workers.
Invoke a worker only after this router has selected its exact actionable
annotation from the target document. Never invoke a worker because ordinary
chat, authored prose, or another skill merely resembles its capability.
Usage
/execute-one <file>
Resolve a relative file path against the current working directory.
Annotation Interpretation
Read the whole document and use its structure and meaning to interpret
<@skill-name> / <@skill-name: prompt> annotations. Prompts may wrap across
lines.
- Skip
<@comment: ...>and paired<@chat-model>response data. - Skip a
chat-userturn already followed by its model response. - Do not execute tags that are being shown as documentation, quoted examples, or code samples. A leading backslash is an optional explicit hint, not a required escape grammar.
- Leave ambiguous, malformed-looking, and unknown tags unchanged; report them instead of guessing.
execute,execute-one, andskill-generatorare entry skills, not inline operations. Preserve and report an apparent annotation using any of those names; never dispatch it.
Skill Discovery
For the selected annotation, look for the matching SKILL.md in project-local
.reactant/skills/, configured skill_roots in order, and then the bundled
Reactant skills available in the current host/install. Project-local skills
may not shadow execute, execute-one, skill-generator, chat-user,
resolve, chat-model, or comment. Report ambiguous collisions and do not
dispatch them.
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.
- 1mo ago First seen · 174 lines · 45 tokens per session scan A 19478479e64e
execute-one is a skill published in the GitHub repository a554b554/Reactant (54 stars, last pushed 1mo ago), licensed MIT. It adds 45 tokens to every session and 1,824 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-10.
Other skills, from other repositories
orbit-notion
Open Orbit briefing skill — selected by the Orbit pipeline when Notion is the user's only connected connector, or when the user explicitly scopes their daily digest to Notion. Pulls the past 24 hours of document edits, comments, mentions, and database row changes from the user's authenticated Notion connection and…
agentmail
Use your assigned AgentMail inbox to read email tasks, explicitly send or reply, and check delivery. Provided automatically by your inbox assignment.
rowboat-spaces
How to work as a member of Rowboat Spaces, the team chat where people and agents work together. Load it once per session, before acting on any request that reaches you from Rowboat; it covers your setup, mentions and hand-offs, the tools, and files.
feishu
Work with Feishu or Lark bots, docs, sheets, bitables, approval flows, and OpenAPI/MCP setup without hardcoding credentials.
pinchtab-mcp
Use this skill when a task requires browser automation through PinchTab's MCP server connected to a remote browser instance. Covers navigation, element interaction, data extraction, form filling, multi-step flows, and session management via MCP tools.
Cortex
Operate Cortex, the LifeOS memory system — the typed Knowledge Archive (People, Companies, Ideas, Research with typed related: links) plus recall of prior work sessions, ISAs, and conversations. Search, add, harvest, develop, ingest, distill, graph-navigate, recall. USE WHEN cortex, knowledge, knowledge base, search…