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/arcassystems/founderos/brain-lognpx skills add ARCASSystems/FounderOS --skill brain-loggit clone --depth 1 https://github.com/ARCASSystems/FounderOSWrote 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/arcassystems/founderos/brain-log)<a href="https://agentmods.dev/skills/arcassystems/founderos/brain-log"><img src="https://agentmods.dev/badge/skills/arcassystems/founderos/brain-log.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 | $0.00187 | $0.01995 |
| Opus 5 | $0.00093 | $0.00997 |
| Sonnet 5 | $0.00037 | $0.00399 |
| Haiku 4.5 | $0.00019 | $0.00199 |
Grade A, and why
brain-log 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 3d 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 — 179 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Brain Log
Runs on: local-writes - creates or edits files in your OS folder; needs an agent with write access.
Three modes for incoming thoughts, plus flags and parked decisions.
Routing
When the founder gives you something to capture, determine which mode:
Mode A: Log and Move On
The thought is worth recording but doesn't connect to anything specific right now.
- Append to
brain/log.mdwith timestamp and a stamped ID (see ID Stamping below) - Tag:
#context - No follow-up
Mode B: Log and Cross-Reference
The thought connects to an existing file or topic.
- Append to
brain/log.mdwith timestamp and a stamped ID - Tag:
#xref:[target-file] - Insert a dated note into the referenced file
- Examples: "This changes my priorities" -> xref to priorities.md. "This affects the deal with X" -> xref to clients.md
Mode C: Log and Act
The thought requires immediate action.
- Append to
brain/log.mdwith timestamp and a stamped ID - Tag:
#acted - Take the action (update a file, create a task, move a priority)
- Note what was done in the log entry
Default: Infer the mode from context. The founder can override: "just log it" (Mode A), "tie this to priorities" (Mode B), "act on this now" (Mode C).
Brain context (default)
Before producing output, read brain/.snapshot.md. If it is missing, or its date: line is more than 3 days old, run python scripts/brain-snapshot.py --write first and read the fresh one - a stale snapshot read as current presents last week's flags and must-dos as today's, which is worse than no memory at all. If Python is unavailable, proceed without it and say so.
If the snapshot is missing, run:
python scripts/brain-snapshot.py --write
Then read it. If the snapshot script is also missing (older install), proceed using only the profile files. Do not block.
The snapshot tells you what flags are open, what the user is working on this week, and what the latest staleness state is. Apply this context to your output where it is relevant. Do not surface every snapshot field in every output - use judgment. For brain logging, recent decisions and open flags help you choose the right tag - if a thought connects to an active flag or recent decision, prefer Mode B (cross-reference) over Mode A (log in isolation).
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.
- 3d ago First seen · 179 lines · 187 tokens per session scan A 43fcc8fe63b5
brain-log is a skill published in the GitHub repository ARCASSystems/FounderOS (5 stars, last pushed 20d ago), licensed MIT. It adds 187 tokens to every session and 1,995 once invoked, about $0.0009 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 2026-08-31.
Other skills, from other repositories
wiki-ingest
Compile a raw source (document, URL content, meeting notes, research output) into a wikikit agent wiki — merge-don't-overwrite, log contradictions, maintain cross-references, then lint. Use whenever the user says "add this to the wiki", "ingest this", or drops new source material for a wiki maintained with…
markstream-react
Integrate the beta markstream-react package into a React 18+ or Next app. Use when Codex needs to add the React renderer, choose the root, next, or server entrypoint, import CSS correctly, choose between content and nodes, keep client boundaries safe, add renderer-local streamingComponents or htmlComponents, use…
markstream-vue2-cli
Integrate markstream-vue2 into a Vue 2 Vue CLI or Webpack 4 app. Use when Codex needs Webpack 4-friendly setup, CDN worker fallbacks for Mermaid or KaTeX, dist/index.css imports, Vue 2 composition-api shims, or code block choices limited to stream-diffs or plain .
publish-report
Publish local HTML, Markdown, or built static web projects with Pagecast as shareable public URLs. Use whenever Codex creates or finishes an .html, .htm, .md, .markdown, or static build output that a person could share (a report, plan, doc, dashboard, or analysis) — proactively offer to publish it without being asked…
alive-people
Weekly -- cross-reference people mentions, nudge stale contacts.
alive-search
Search across all walnuts -- decisions, people, files, references, insights, log history.