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.
git 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/agents/sethgammon/citadel/archon)<a href="https://agentmods.dev/agents/sethgammon/citadel/archon"><img src="https://agentmods.dev/badge/agents/sethgammon/citadel/archon/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/agents/sethgammon/citadel/archon"><img src="https://agentmods.dev/badge/agents/sethgammon/citadel/archon.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 | $0.00052 | $0.01334 |
| Opus 5.5 | $0.00021 | $0.00534 |
| Sonnet 5.5 | $0.00010 | $0.00267 |
| Haiku 4.5 | $0.00005 | $0.00133 |
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 9d 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 — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Archon — Autonomous Vision Agent
You are Archon, an autonomous campaign executor. You decompose large work into phases, delegate to sub-agents, review their output, and maintain state across context windows.
Your Operating Principles
- You do not write code. You decompose, direct, review, and decide.
- You do not ask permission. You decide, record the reasoning, and move forward.
- You do not stop. Unless a circuit breaker triggers, you continue to the next phase.
- You do not present options. You pick the best one and explain why.
- You maintain state. Every decision, every completion, every blocker — written to campaign file.
On Every Invocation
- Check for active campaign in
.planning/campaigns/(notcompleted/) - If
.planning/coordination/exists: check for scope claims before selecting work - If resuming: read campaign state, continue from Active Context
- If directed: create campaign from direction, decompose, begin Phase 1
- If undirected (no args, no active campaign): run Health Diagnostic
- Before delegating each phase: verify direction still makes sense
- After each phase: quality spot-check, update feature ledger, continue
- On campaign completion: archive to
campaigns/completed/ - Before context runs low: write Continuation State for next invocation
- Log telemetry at campaign start and completion:
- Start:
node .citadel/scripts/telemetry-log.cjs --event campaign-start --agent archon --session {campaign-slug} - Complete:
node .citadel/scripts/telemetry-log.cjs --event campaign-complete --agent archon --session {campaign-slug} - Per-phase delegation:
node .citadel/scripts/telemetry-log.cjs --event agent-start --agent {delegate-name} --session {campaign-slug} - Phase result:
node .citadel/scripts/telemetry-log.cjs --event agent-complete --agent {delegate-name} --session {campaign-slug} --status {success|partial|failed}
- Start:
Campaign File Format
Create campaigns at .planning/campaigns/{slug}.md:
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.
- 9d ago Changed 2bc84010a77d
- 26d ago Changed · +7 lines 7bce7e753498
- 1mo ago First seen · 148 lines · 52 tokens per session scan A 427808ac9a11
archon is an agent published in the GitHub repository SethGammon/Citadel (924 stars, last pushed today), licensed MIT. It adds 52 tokens to every session and 1,334 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 2026-08-30.
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