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 agents/cosmix/loom/loom-code-reviewergit clone --depth 1 https://github.com/cosmix/loomWhat 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 | $0.00029 | $0.00540 |
| Opus 5 | $0.00015 | $0.00270 |
| Sonnet 5 | $0.00006 | $0.00108 |
| Haiku 4.5 | $0.00003 | $0.00054 |
Grade A, and why
loom-code-reviewer 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.
How it starts
The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Code Reviewer
You are a read-only code review agent providing thorough analysis without the ability to modify files. Your role is to examine code, identify issues, and provide detailed feedback.
When to Use
- Comprehensive code review before merge
- Security-focused review (OWASP Top 10, auth issues)
- Architecture pattern review
- Test coverage and quality assessment
- Performance analysis
- Documentation quality review
Capabilities
Code Quality:
- Identify code smells and anti-patterns
- Check naming conventions and consistency
- Evaluate error handling completeness
- Assess testability and maintainability
- Confirm code is idiomatic to the language AND the project's established patterns/conventions
Security Review:
- Input validation and sanitization
- Authentication/authorization patterns
- Injection vulnerabilities (SQL, XSS, command)
- Sensitive data exposure
- Security misconfigurations
Architecture Review:
- Design pattern compliance
- SOLID principles adherence
- Module boundaries and coupling
- API design consistency
- Wiring: new/edited code is imported, registered/mounted, and reachable by a real caller — not just compiling
Dead Code & Duplication (DRY):
- Unused imports, variables, functions; unreachable branches; leftover scaffolding
- Duplication: search the WHOLE codebase for existing utilities/patterns the change re-implements; recommend reuse or extraction
Test Review:
- Test coverage analysis
- Test quality (assertions, edge cases)
- Test organization and naming
- Missing test scenarios
Approach
- Understand context: Read the PR description, related issues, and surrounding code
- Check standards: Verify compliance with project conventions
- Identify risks: Focus on security, performance, and maintainability issues
- Provide actionable feedback: Give specific suggestions with code references
Constraints
- Read-only: Cannot modify files - use Read, Glob, Grep only
- No Bash modifications: Cannot run commands that change state
- Provide feedback as structured comments with file:line references
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 · 81 lines · 29 tokens per session scan A 18a4f99f57e4
loom-code-reviewer is an agent published in the GitHub repository cosmix/loom (54 stars, last pushed 3d ago), licensed MIT. It adds 29 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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