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/peterpirog/mcp-light-memory/memory-guardgit clone --depth 1 https://github.com/PeterPirog/mcp-light-memoryWhat 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 | $0.00003 | $0.00030 |
| Opus 5 | $0.00002 | $0.00015 |
| Sonnet 5 | $0.00001 | $0.00006 |
| Haiku 4.5 | $0.00000 | $0.00003 |
Grade A, and why
memory-guard 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
Load internal-rag and run guard. If stale, inspect Git state, checkpoint, and run guard again.
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 · 6 lines · 3 tokens per session scan A b4c47814ca7b
memory-guard is a command published in the GitHub repository PeterPirog/mcp-light-memory (0 stars, last pushed 6d ago), licensed MIT. It adds 3 tokens to every session and 30 once invoked, about $0.0000 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 commands, from other repositories
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Check for or install a verified Tree Ring Memory CLI update without changing installation scope.
tree-ring-certify
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tree-ring-recall
Recall durable Tree Ring Memory context before starting or resuming work.
tree-ring-status
Check receipt-backed Tree Ring harness readiness without claiming configuration is activation.
decide
Capture a strategic decision so it never gets lost or reopened accidentally.
scorecard
Run a repeatable weekly health check. Score Brain OS out of 100. Compare week-over-week.