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 commands/zircote/subcog/capturegit clone --depth 1 https://github.com/zircote/subcogWhat 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 | $0.00016 | $0.00540 |
| Opus 5 | $0.00008 | $0.00270 |
| Sonnet 5 | $0.00003 | $0.00108 |
| Haiku 4.5 | $0.00002 | $0.00054 |
Grade A, and why
capture 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
/subcog:capture
Capture decisions, learnings, patterns, and context as persistent memories.
Usage
/subcog:capture "Use PostgreSQL for primary storage"
/subcog:capture --namespace decisions "Chose Rust for single-binary distribution"
/subcog:capture --interactive
Arguments
Execution Strategy
Namespace Detection: If no namespace specified, detect from signal words:
- "decided", "chose", "going with" → decisions
- "always", "never", "when X do Y" → patterns
- "TIL", "learned", "gotcha" → learnings
- "because", "constraint" → context
- "TODO", "FIXME", "temporary" → tech-debt
Interactive Mode
Examples
Explicit namespace:
/subcog:capture --namespace decisions "Use thiserror for custom error types in library code"
Interactive mode:
/subcog:capture --interactive
Will prompt for namespace, content, context, and tags.
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 · 74 lines · 16 tokens per session scan A 3afb88f1516e
capture is a command published in the GitHub repository zircote/subcog (28 stars, last pushed 29d ago), licensed MIT. It adds 16 tokens to every session and 540 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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audit-quiz-coverage
Find quiz coverage gaps from recent guide/CHANGELOG/CC-releases changes and propose new questions.
retex
Retex - Capture lesson learned dans memory après fix, rollback, erreur.
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Guided onboarding - walk through a complete OpenSpec workflow cycle with narration.
tm-save
Save this session's durable memory to trailmem before you exit.
setup
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