Archon is a workflow engine for AI coding agents that turns development processes into YAML-defined sequences with phases, validation gates, and artifacts. Developers use it to run repeatable processes such as planning, implementation, testing, code review, and pull-request creation across projects. The catalogue entries provide commands, agents, skills, hooks, instructions, and settings for working with Archon.
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/coleam00/archon/archon-clinpx skills add coleam00/Archon --skill archon-cligit clone --depth 1 https://github.com/coleam00/ArchonWrote 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/coleam00/archon/archon-cli)<a href="https://agentmods.dev/skills/coleam00/archon/archon-cli"><img src="https://agentmods.dev/badge/skills/coleam00/archon/archon-cli.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 | $0.00165 | $0.01317 |
| Opus 5 | $0.00082 | $0.00659 |
| Sonnet 5 | $0.00033 | $0.00263 |
| Haiku 4.5 | $0.00016 | $0.00132 |
Grade A, and why
archon-cli 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 — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Archon CLI
Archon runs multi-step AI workflows through the archon CLI. Git projects use
isolated worktrees by default; registered folder projects run in place. This
skill has five capabilities; route by intent:
| User wants to... | Read |
|---|---|
| Run workflows on real work | running-workflows/running-workflows.md |
| Manage existing runs (inspect/approve/reject/cancel/resume) | manage-run/manage-runs.md |
| Set up Archon or change config | setup-and-config/setup-and-config.md |
| Author a new workflow | authoring-workflows/authoring-workflows.md (+ its node-reference.md) |
| Improve prompts for workflow nodes or run messages | prompting-mistakes/prompting-mistakes.md |
Routing rules:
- Intent is clear from the request ("build me a workflow for X", "run archon-ship on issue #42") → route directly. Do not ask.
- Genuinely ambiguous → ask the user which capability they want, listing these five.
- First contact with an unconfigured machine →
setup-and-config/setup-and-config.mdbefore anything else.
Quick spine: running a workflow
Most requests land here. The short version; details in the running reference:
- Discover what exists with the compact catalog:
archon workflow list --json. Use its previews to identify plausible candidates, and treatdescriptionTruncated: trueas an explicit signal that a description is incomplete — never assume names from memory. - Fetch each plausible candidate's untouched description with
archon workflow list <name> --full. Choose from the full descriptions, not a truncated preview. - Check the input before spending anything. The message (or the issue, or the
document the run reads) is the contract the whole run is measured against. Hold it
against the six in
running-workflows.md— problem, why it matters, why now, outcome, invariants, acceptance. If any is missing, say which, propose a corrected input, and get the user's agreement before launching. Do not silently improve it, and do not launch anyway. - Invoke detached by default (workflows are long-running):
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- authoring-workflows/authoring-workflows.md 12 KB
- authoring-workflows/node-reference.md 12 KB
- authoring-workflows/variables.md 7.5 KB
- manage-run/manage-runs.md 7.7 KB
- manage-run/troubleshooting.md 12 KB
- prompting-mistakes/prompting-mistakes.md 2.9 KB
- running-workflows/running-workflows.md 9.2 KB
- setup-and-config/setup-and-config.md 7.7 KB
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 Changed · +21 lines c32f936846fb
- 5d ago First seen · 80 lines · 165 tokens per session scan A d16c1aca31cb
archon-cli is a skill published in the GitHub repository coleam00/Archon (23,366 stars, last pushed yesterday), licensed MIT. It adds 165 tokens to every session and 1,317 once invoked, about $0.0008 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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