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/tmcfarlane/oh-my-cursor/exploring-codebasesnpx skills add tmcfarlane/oh-my-cursor --skill exploring-codebasesgit clone --depth 1 https://github.com/tmcfarlane/oh-my-cursorWhat 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 | $0.00071 | $0.01023 |
| Opus 5 | $0.00036 | $0.00511 |
| Sonnet 5 | $0.00014 | $0.00205 |
| Haiku 4.5 | $0.00007 | $0.00102 |
Grade A, and why
exploring-codebases 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 — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Exploring Codebases
Hybrid search tool that combines the speed of ripgrep with structural awareness from tree-sitter or pre-generated _MAP.md files. It finds matches and returns the entire function or class containing the match, de-duplicating results semantically.
Progressive Disclosure
By default, returns signatures only (docstrings + declarations without function bodies), reducing token usage by 10-20x. Use --expand-full to get complete implementations when needed.
Installation
uv venv /home/claude/.venv
# tree-sitter is optional if using --use-maps mode
uv pip install tree-sitter-language-pack --python /home/claude/.venv/bin/python
Usage
# Default: signatures only with tree-sitter (efficient)
/home/claude/.venv/bin/python /mnt/skills/user/exploring-codebases/scripts/search.py "query" /path/to/repo
# Full implementations
/home/claude/.venv/bin/python /mnt/skills/user/exploring-codebases/scripts/search.py "query" /path/to/repo --expand-full
# Map-based mode: no tree-sitter required (#276)
# Requires _MAP.md files generated by mapping-codebases
/home/claude/.venv/bin/python /mnt/skills/user/exploring-codebases/scripts/search.py "query" /path/to/repo --use-maps
Options
--glob pattern: Filter files (e.g.,*.py,*.ts)--expand-full: Return full implementations instead of signatures--json: Output JSON for machine processing (default is Markdown)--use-maps: Use pre-generated_MAP.mdfiles instead of tree-sitter for context expansion. Eliminates redundant tree-sitter parsing when maps already exist.
Map-Based Mode (v0.3.0)
When _MAP.md files exist (generated by mapping-codebases), use --use-maps to skip tree-sitter entirely:
mapping-codebasesruns tree-sitter once to generate_MAP.mdfiles with symbol locationsexploring-codebases --use-mapsuses ripgrep + map data for context expansion- No redundant AST parsing at search time
Benefits:
- Single tree-sitter execution per codebase (during map generation)
- Faster searches (no AST parsing overhead)
tree-sitter-language-packnot required at runtime- Maps serve as canonical index for both navigation and search
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 · 104 lines · 71 tokens per session scan A ec7166f498c7
exploring-codebases is a skill published in the GitHub repository tmcfarlane/oh-my-cursor (108 stars, last pushed 2mo ago), licensed MIT. It adds 71 tokens to every session and 1,023 once invoked, about $0.0004 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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