MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Symbol-level navigation of a local checkout using tree-sitter ASTs.
MITAuto-check passed
Install Tree Sitting
$ npx skills add oaustegard/claude-skills --skill tree-sitting -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install oaustegard/claude-skills tree-sitting --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/oaustegard/claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/tree-sitting .claude/skills/tree-sitting && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "tree-sitting" agent skill from https://github.com/oaustegard/claude-skills/tree/main/tree-sitting into .claude/skills/tree-sitting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tree-sitting", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/oaustegard/claude-skills/tree/main/tree-sittingType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add oaustegard/claude-skills --skill tree-sitting -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install oaustegard/claude-skills tree-sitting --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oaustegard/claude-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/tree-sitting .agents/skills/tree-sitting && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "tree-sitting" agent skill from https://github.com/oaustegard/claude-skills/tree/main/tree-sitting into .agents/skills/tree-sitting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tree-sitting", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add oaustegard/claude-skills --skill tree-sitting -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install oaustegard/claude-skills tree-sitting --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oaustegard/claude-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/tree-sitting .cursor/skills/tree-sitting && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "tree-sitting" agent skill from https://github.com/oaustegard/claude-skills/tree/main/tree-sitting into .cursor/skills/tree-sitting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tree-sitting", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/oaustegard/claude-skills.git --path tree-sitting--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add oaustegard/claude-skills --skill tree-sitting -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install oaustegard/claude-skills tree-sitting --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oaustegard/claude-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/tree-sitting .gemini/skills/tree-sitting && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "tree-sitting" agent skill from https://github.com/oaustegard/claude-skills/tree/main/tree-sitting into .gemini/skills/tree-sitting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tree-sitting", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install oaustegard/claude-skills tree-sittingInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add oaustegard/claude-skills --skill tree-sitting -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/oaustegard/claude-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/tree-sitting .github/skills/tree-sitting && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "tree-sitting" agent skill from https://github.com/oaustegard/claude-skills/tree/main/tree-sitting into .github/skills/tree-sitting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tree-sitting", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add oaustegard/claude-skills --skill tree-sitting -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install oaustegard/claude-skills tree-sitting --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oaustegard/claude-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/tree-sitting .opencode/skills/tree-sitting && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "tree-sitting" agent skill from https://github.com/oaustegard/claude-skills/tree/main/tree-sitting into .opencode/skills/tree-sitting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tree-sitting", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
tree-sitting- GitHub stars
- 150
- Token cost
- ~806 tokens
- SKILL.md length
- 265 words
- Files
- 40 (incl. scripts)
- Skills in repo
- 66
- Repo updated
- First seen
- Licence
- MIT
At a glance
Symbol-level navigation of a local checkout using tree-sitter ASTs.
- Where is X defined
- SKILL.md covers Setup, Use and Use something else for
- Calls python3 and pip
- Find the function/class named
What it does
Tree Sitting is an agent skill from oaustegard/claude-skills. Symbol-level navigation of a local checkout using tree-sitter ASTs. Answers where a symbol is defined, what lines it spans, which symbols a file exposes, what a directory holds, and where a name is referenced — every answer carries exact line ranges to feed straight into a scoped read. Use for "where is X defined", "who calls X", "find the function/class named", "what's in this file", "give me the line range for", "show me the source of", "list the symbols in", or before editing a file you have not read. Each…
Its SKILL.md is about 810 tokens, which your agent loads only when the skill is triggered. The skill folder holds 40 other files, including scripts (for example `CHANGELOG.md` and `README.md`).
It works with Python. The repository describes itself as: My collection of Claude skills. The licence is MIT.
When your agent uses it
- Where is X defined
- Find the function/class named
- Whats in this file
- Give me the line range for
Example prompts
- “where is X defined”
- “who calls X”
- “find the function/class named”
- “/tree-sitting”
Requirements
- Python 3
What it can do on your machine
Read from SKILL.md and the folder at commit cf49d47. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 1 file in scripts/, which the agent can run.
Shell commands in SKILL.md call:
python3pip
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pip, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Tree Sitting loads about 806 tokens when it runs. Until then it costs about 207 tokens; SKILL.md has 265 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
SKILL.md
The full file from oaustegard/claude-skills at commit cf49d47, republished under its MIT licence (© oaustegard). 265 words, ~806 tokens.
Download SKILL.mdSave it as
.claude/skills/tree-sitting/SKILL.md (or your agent's skills folder). This skill also uses 39 other files; get the full folder from GitHub.- name
- tree-sitting
- description
- Symbol-level navigation of a local checkout using tree-sitter ASTs. Answers where a symbol is defined, what lines it spans, which symbols a file exposes, what a directory holds, and where a name is referenced — every answer carries exact line ranges to feed straight into a scoped read. Use for "where is X defined", "who calls X", "find the function/class named", "what's in this file", "give me the line range for", "show me the source of", "list the symbols in", or before editing a file you have not read. Each invocation auto-scans and is self-contained. Not for first-encounter repo orientation (use exploring-codebases), for what a codebase DOES rather than what it contains (featuring), for binding-resolved Python caller sets (searching-codebases), or for literal text and regex matching (plain ripgrep).
- metadata.version
- 0.10.1
tree-sitting
Tree-sitter symbol index over a local checkout. Every result carries line
ranges, so the next step is a scoped Read.
Setup
Needs Python 3.10+ and pip install tree-sitter. On macOS, /usr/bin/python3
is 3.9 and will not work; use a Homebrew or uv Python. Grammars are bundled
for Linux x86_64 (parsers/*.so) and macOS (parsers/*.dylib).
If a file's grammar doesn't load, the file is skipped and stderr prints
WARNING: no grammar for … with the fix. Resolve that before trusting an empty
result. On other platforms, run python3 scripts/build_grammars.py (needs git
and cc). It writes to $TREESIT_PARSERS_DIR, or ~/.cache/tree-sitting/parsers/
when that is unset, and grammars there take precedence over the bundle.
Installed tree-sitter-<lang> wheels are the last fallback.
Use
scripts/treesit.py in this skill's directory scans the repo on every call
(cached on disk; invalidated when files or grammars change), prints a tree
overview, then answers the queries. Batch queries so one scan serves them all.
python3 scripts/treesit.py REPO # overview, depth 1
python3 scripts/treesit.py REPO --path=src/core --detail=full # drill in
python3 scripts/treesit.py REPO --no-tree 'find:Parser*' 'source:parse_input' 'refs:ParseState'| Query | Returns |
|---|---|
find:PATTERN[:KIND[:LIMIT]] | symbols by name, substring or glob |
symbols:FILE | every symbol in a file |
source:SYMBOL[:FILE] | the symbol's source |
refs:SYMBOL[:LIMIT] | textual references |
imports:FILE | a file's imports |
dir:PATH | directory overview |
Flags: --depth N (-1 = all), --detail sparse|normal|full, --path DIR,
--skip DIRS, --no-tree, --stats, --no-cache, --rebuild-cache.
scripts/engine.py exposes CodeCache for use inside one Python process.
Languages: Python, JavaScript, TypeScript/TSX, Go, Rust, Ruby, Java, C, HTML,
Markdown (heading outline), Mojo. Other languages get generic extraction if
their tree-sitter-<lang> wheel is installed.
Use something else for
- a repo that isn't on disk:
accessing-github-repos - what a codebase does:
featuring - a first look at an unfamiliar repo:
exploring-codebases - binding-resolved Python callers:
searching-codebases --refs - literal text or regex:
rg
© oaustegard, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 39 other files (scripts) in tree-sitting of oaustegard/claude-skills.
- SKILL.md
- CHANGELOG.md
- README.md
- parsers/libtree_sitter_c.dylib
- parsers/libtree_sitter_c.so
- parsers/libtree_sitter_go.dylib
- parsers/libtree_sitter_go.so
- parsers/libtree_sitter_html.dylib
- parsers/libtree_sitter_html.so
- parsers/libtree_sitter_java.dylib
- parsers/libtree_sitter_java.so
- parsers/libtree_sitter_javascript.dylib
- parsers/libtree_sitter_javascript.so
- parsers/libtree_sitter_markdown.dylib
- parsers/libtree_sitter_markdown.so
- parsers/libtree_sitter_mojo.dylib
- parsers/libtree_sitter_mojo.so
- parsers/libtree_sitter_python.dylib
- parsers/libtree_sitter_python.so
- parsers/libtree_sitter_ruby.dylib
- … and 20 more
Open the folder on GitHubat commit cf49d47
Compare with similar skills
Tree Sitting next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Tree Sitting this skilloaustegard/claude-skills | 150 | — | ~806 | Automated safety check: Pass | MIT | |
| MCP Server Builderanthropics/skills | 180k | 63 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| PDF Processinganthropics/skills | 180k | 48 repos | ~2k | Automated safety check: Pass | Proprietary | |
| NotebookLM Research AssistantPleasePrompto/notebooklm-skill | 7.8k | 14 repos | ~2.4k | Automated safety check: Notes | MIT | |
| Manim Video Productionbrowser-use/video-use | 28k | 6 repos | ~3k | Automated safety check: Pass | MIT | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT |
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Related
Works with
Questions about Tree Sitting
What does Tree Sitting do?
Symbol-level navigation of a local checkout using tree-sitter ASTs. Tree Sitting is an agent skill from oaustegard/claude-skills. Symbol-level navigation of a local checkout using tree-sitter ASTs.
When should I use Tree Sitting?
Tree Sitting fits situations like: where is X defined; find the function/class named; whats in this file; give me the line range for.
How do I install Tree Sitting in Claude Code?
Run `npx skills add oaustegard/claude-skills --skill tree-sitting -a claude-code`. Or copy the skill folder (tree-sitting in oaustegard/claude-skills) into .claude/skills/tree-sitting in your project. Claude Code loads it when a task matches its description.
How do I install Tree Sitting in Codex?
Run `npx skills add oaustegard/claude-skills --skill tree-sitting -a codex`. Or copy the skill folder (tree-sitting in oaustegard/claude-skills) into .agents/skills/tree-sitting in your project. Codex loads it when a task matches its description.
Can I use Tree Sitting in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add oaustegard/claude-skills --skill tree-sitting -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tree-sitting, .gemini/skills/tree-sitting, .github/skills/tree-sitting and .opencode/skills/tree-sitting in your project.
What does Tree Sitting need to run?
Going by SKILL.md and its folder, Tree Sitting needs the command-line tools its instructions call (python3 and pip). Our summary lists: Python 3.
Does Tree Sitting access the network?
SKILL.md contains no URLs. Its commands use pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Tree Sitting safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Tree Sitting use?
Tree Sitting is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Tree Sitting use?
About 806 tokens (SKILL.md is roughly 3.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Tree Sitting?
Skills that share tags, products or a category with Tree Sitting: MCP Server Builder (anthropics/skills, 180k stars), PDF Processing (anthropics/skills, 180k stars), NotebookLM Research Assistant (PleasePrompto/notebooklm-skill, 7.8k stars) and Manim Video Production (browser-use/video-use, 28k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Tree Sitting?
oaustegard (a GitHub user) maintains it in oaustegard/claude-skills, which has 150 GitHub stars. The repository holds 66 skills in this directory. The repository was last updated on October 8, 2026.
Source: oaustegard/claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.