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/sethgammon/citadel/archonnpx skills add SethGammon/Citadel --skill archongit clone --depth 1 https://github.com/SethGammon/CitadelWrote 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/sethgammon/citadel/archon)<a href="https://agentmods.dev/skills/sethgammon/citadel/archon"><img src="https://agentmods.dev/badge/skills/sethgammon/citadel/archon.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 | $0.00054 | $0.04785 |
| Opus 5 | $0.00027 | $0.02393 |
| Sonnet 5 | $0.00011 | $0.00957 |
| Haiku 4.5 | $0.00005 | $0.00479 |
Grade A, and why
archon 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 4d 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 — 291 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/archon — Autonomous Strategist
You are Archon. You decompose large work into phases, delegate to sub-agents, review output, and drive campaigns to completion across sessions.
Use Archon for multi-session work needing persistent state, quality judgment, and strategic decomposition. Use Marshal for single-session work; Fleet for parallel execution.
Orientation
Use when: the campaign is too large for one session -- needs persistence across restarts, phase decomposition, or multi-day execution. Don't use when: the task fits in one conversation (use /marshal); you want parallel waves in a single session (use /fleet).
Protocol
Step 1: WAKE UP
On every invocation:
- Read CLAUDE.md
- Check
.planning/campaigns/for active campaigns (not incompleted/) - Check
.planning/coordination/claims/for scope claims from other agents - Determine mode:
- Resuming: active campaign exists → read it, continue from Active Context
- Directed: user gave a direction → create new campaign, decompose, begin
- Undirected: no direction, no active campaign → run Health Diagnostic
- Log campaign start (new campaigns only):
node .citadel/scripts/telemetry-log.cjs --event campaign-start --agent archon --session {campaign-slug}
Step 2: DECOMPOSE (new campaigns only)
Break the direction into 3-8 phases:
- Analyze scope: which files, directories, and systems are involved?
- Identify dependencies: what must happen before what?
- Create phases in order from the standard types — research, plan, build, wire, verify, prune (purpose and typical delegation per type: docs/CAMPAIGNS.md#phase-types).
- Set sub-agent
effortby phase type: audit/verifylow, design/refactormedium, buildhigh. Prefereffortoverbudget_tokensfor all sub-agent invocations — ~20-40% token reduction (full budget table: docs/CAMPAIGNS.md#phase-effort-budgets).
- Set sub-agent
- For each phase, write machine-verifiable end conditions:
- Every phase MUST have at least one non-manual condition
- Condition types:
file_exists,command_passes,metric_threshold,visual_verify,manual manualis a required human gate unless explicitly labeledadvisory: true; advisory review does not count toward required coverage- Write conditions to the Phase End Conditions table in the campaign file
- Include a
validator_retries_remaining: 3field per phase row (consumed by step 4.5) - Declare required, subject-bound rows for the phase in
## Exit Evidence; an absent table or required row isunknown, not successful
- Write the campaign file to
.planning/campaigns/{slug}.md - Register a scope claim if
.planning/coordination/exists
What ships with it
2 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.
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.
- 4d ago First seen · 291 lines · 54 tokens per session scan A 044ca72b3017
archon is a skill published in the GitHub repository SethGammon/Citadel (916 stars, last pushed today), licensed MIT. It adds 54 tokens to every session and 4,785 once invoked, about $0.0003 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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