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/spillwavesolutions/agent-brain/agent-brain-startgit clone --depth 1 https://github.com/SpillwaveSolutions/agent-brainWhat 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 | $0.00013 | $0.01911 |
| Opus 5 | $0.00006 | $0.00955 |
| Sonnet 5 | $0.00003 | $0.00382 |
| Haiku 4.5 | $0.00001 | $0.00191 |
Grade B, and why
agent-brain-start scanned grade B with 1 finding 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
chmod 755 .agent-brain How it starts
The opening of the file, as written. The whole thing — 331 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Brain Start
Purpose
Starts the Agent Brain server for the current project. The server provides:
- Document indexing and storage
- Hybrid, semantic, and keyword search
- Multi-instance support with automatic port allocation
Usage
/agent-brain:agent-brain-start [--path <dir>] [--host <host>] [--port <port>] [--foreground] [--strict] [--json]
Parameters
| Parameter | Required | Default | Description |
|---|---|---|---|
| --path, -p | No | auto-detect | Project path |
| --host | No | 127.0.0.1 | Server bind host (overrides config) |
| --port | No | auto-select (8000-8100) | Server port (overrides config) |
| --foreground, -f | No | false | Run in foreground (don't daemonize) |
| --timeout | No | 30 | Startup timeout in seconds |
| --strict | No | false | Fail on critical provider config errors |
| --json | No | false | Output as JSON |
Execution
Pre-flight Check
Verify the project is initialized:
# Check for .agent-brain/ directory
ls -la .agent-brain/
If not initialized:
agent-brain init
Start Server
# Start in background (default, recommended)
agent-brain start
# Start on a specific port
agent-brain start --port 8080
# Start in foreground for debugging
agent-brain start --foreground
# Start with strict mode (fail on missing API keys)
agent-brain start --strict
# Start for a specific project path
agent-brain start --path /my/project
# JSON output for scripting
agent-brain start --json
Verify Server Started
agent-brain status
Output
Successful Start
Agent Brain Server Running
URL: http://127.0.0.1:8000
PID: 12345
Project: /home/user/my-project
Log: /home/user/my-project/.agent-brain/logs/server.log
Next steps:
- Query: agent-brain query 'search term' --url http://127.0.0.1:8000
- Stop: agent-brain stop
JSON Output
{
"status": "started",
"base_url": "http://127.0.0.1:8000",
"pid": 12345,
"project_root": "/home/user/my-project",
"log_file": "/home/user/my-project/.agent-brain/logs/server.log"
}
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 · 331 lines · 13 tokens per session scan B d626d7bf2be6
agent-brain-start is a command published in the GitHub repository SpillwaveSolutions/agent-brain (117 stars, last pushed 3d ago), licensed MIT. It adds 13 tokens to every session and 1,911 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other commands, from other repositories
checklist
Generate a custom checklist for the current feature based on user requirements.
clarify
Identify underspecified areas in the current feature spec by asking up to 5 highly targeted clarification questions and encoding answers back into the spec.
specify
Create or update the feature specification from a natural language feature description.
analyze
Perform a non-destructive cross-artifact consistency and quality analysis across spec.md, plan.md, and tasks.md after task generation.
constitution
Create or update the project constitution from interactive or provided principle inputs.
converge
Assess the current codebase against the feature's spec, plan, and tasks, then append any remaining unbuilt work as new tasks to tasks.md so implement can complete it.