Mobile App Debugging
secondsky/claude-skills
Mobile app debugging for iOS, Android, cross-platform frameworks.
Help users debug PostHog Error Tracking stack-trace symbolication for any supported platform — JavaScript/TypeScript web, React Native (Hermes), Android (Proguard / R8), or iOS / macOS (dSYM).
Install Diagnosing Stacktrace Symbolication
$ npx skills add PostHog/posthog --skill diagnosing-stacktrace-symbolication -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install PostHog/posthog diagnosing-stacktrace-symbolication --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/PostHog/posthog.git skills-src && mkdir -p .claude/skills && cp -r skills-src/products/error_tracking/skills/diagnosing-stacktrace-symbolication .claude/skills/diagnosing-stacktrace-symbolication && 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 "diagnosing-stacktrace-symbolication" agent skill from https://github.com/PostHog/posthog/tree/master/products/error_tracking/skills/diagnosing-stacktrace-symbolication into .claude/skills/diagnosing-stacktrace-symbolication/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "diagnosing-stacktrace-symbolication", 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/PostHog/posthog/tree/master/products/error_tracking/skills/diagnosing-stacktrace-symbolicationType 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 PostHog/posthog --skill diagnosing-stacktrace-symbolication -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install PostHog/posthog diagnosing-stacktrace-symbolication --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .agents/skills && cp -r skills-src/products/error_tracking/skills/diagnosing-stacktrace-symbolication .agents/skills/diagnosing-stacktrace-symbolication && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "diagnosing-stacktrace-symbolication" agent skill from https://github.com/PostHog/posthog/tree/master/products/error_tracking/skills/diagnosing-stacktrace-symbolication into .agents/skills/diagnosing-stacktrace-symbolication/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "diagnosing-stacktrace-symbolication", 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 PostHog/posthog --skill diagnosing-stacktrace-symbolication -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install PostHog/posthog diagnosing-stacktrace-symbolication --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/products/error_tracking/skills/diagnosing-stacktrace-symbolication .cursor/skills/diagnosing-stacktrace-symbolication && 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 "diagnosing-stacktrace-symbolication" agent skill from https://github.com/PostHog/posthog/tree/master/products/error_tracking/skills/diagnosing-stacktrace-symbolication into .cursor/skills/diagnosing-stacktrace-symbolication/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "diagnosing-stacktrace-symbolication", 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/PostHog/posthog.git --path products/error_tracking/skills/diagnosing-stacktrace-symbolication--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 PostHog/posthog --skill diagnosing-stacktrace-symbolication -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install PostHog/posthog diagnosing-stacktrace-symbolication --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/products/error_tracking/skills/diagnosing-stacktrace-symbolication .gemini/skills/diagnosing-stacktrace-symbolication && 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 "diagnosing-stacktrace-symbolication" agent skill from https://github.com/PostHog/posthog/tree/master/products/error_tracking/skills/diagnosing-stacktrace-symbolication into .gemini/skills/diagnosing-stacktrace-symbolication/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "diagnosing-stacktrace-symbolication", 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 PostHog/posthog diagnosing-stacktrace-symbolicationInstalls 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 PostHog/posthog --skill diagnosing-stacktrace-symbolication -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .github/skills && cp -r skills-src/products/error_tracking/skills/diagnosing-stacktrace-symbolication .github/skills/diagnosing-stacktrace-symbolication && 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 "diagnosing-stacktrace-symbolication" agent skill from https://github.com/PostHog/posthog/tree/master/products/error_tracking/skills/diagnosing-stacktrace-symbolication into .github/skills/diagnosing-stacktrace-symbolication/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "diagnosing-stacktrace-symbolication", 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 PostHog/posthog --skill diagnosing-stacktrace-symbolication -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install PostHog/posthog diagnosing-stacktrace-symbolication --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/products/error_tracking/skills/diagnosing-stacktrace-symbolication .opencode/skills/diagnosing-stacktrace-symbolication && 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 "diagnosing-stacktrace-symbolication" agent skill from https://github.com/PostHog/posthog/tree/master/products/error_tracking/skills/diagnosing-stacktrace-symbolication into .opencode/skills/diagnosing-stacktrace-symbolication/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "diagnosing-stacktrace-symbolication", 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
diagnosing-stacktrace-symbolication- GitHub stars
- 40k
- Token cost
- ~2.2k tokens
- SKILL.md length
- 903 words
- Files
- 3 (incl. scripts, references)
- Skills in repo
- 252
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Help users debug PostHog Error Tracking stack-trace symbolication for any supported platform — JavaScript/TypeScript web, React Native (Hermes), Android (Proguard / R8), or iOS / macOS (dSYM).
- Works in 5 steps: Find how symbol data is produced and… → Build and inspect local artifacts → Check symbol sets in PostHog → …
- Stack frames stay minified
- SKILL.md covers Platforms, Workflow, Captured frame checks and Failure matrix (cross-platform)
- Runs Python scripts from its folder
What it does
Diagnosing Stacktrace Symbolication is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Help users debug PostHog Error Tracking stack-trace symbolication for any supported platform — JavaScript/TypeScript web, React Native (Hermes), Android (Proguard / R8), or iOS / macOS (dSYM). The PostHog symbol-set lookup flow is universal across platforms; build-tool and artifact details live in per-platform references (JavaScript is fleshed out, others come as we encounter them). Use when stack frames stay minified or obfuscated after symbols are uploaded, PostHog symbol sets show lastused but frames are not…
Its SKILL.md is about 2.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including scripts and reference files (for example `references/javascript.md` and `scripts/inspect_sourcemaps.py`).
It sits in Mobile, covering Debugging and Cross-platform mobile apps. It works with PostHog, JavaScript, React Native and TypeScript. The repository describes itself as: :hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error…
When your agent uses it
- Stack frames stay minified
- Obfuscated after symbols are uploaded
- PostHog symbol sets show lastused but frames are not readable
- DSYM UUIDs do not match
Example prompts
- “Token not found”
- “/diagnosing-stacktrace-symbolication”
Requirements
- Python 3
- Node.js
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Find how symbol data is produced and uploaded
- Build and inspect local artifacts
- Check symbol sets in PostHog
- Compare local, uploaded, and served files
- Fix the most likely layer
What it can do on your machine
Read from SKILL.md and the folder at commit 10f9ad7. 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/ (Python), which the agent can run.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
Diagnosing Stacktrace Symbolication loads about 2.2k tokens when it runs, and up to ~4.1k if it reads all its reference files. Until then it costs about 188 tokens; SKILL.md has 903 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 903 words (~2,223 tokens).
“Symbolication is the cross-platform name for what JavaScript source-map lookup, Hermes function-offset resolution, Proguard / R8 demangling, and dSYM address-to-line lookup all do — turn a minified or obfuscated frame back into a readable file, function, and line.”
- name
- diagnosing-stacktrace-symbolication
Files
SKILL.md and 2 other files (scripts, references) in products/error_tracking/skills/diagnosing-stacktrace-symbolication of PostHog/posthog.
- SKILL.md
- references/javascript.md
- scripts/inspect_sourcemaps.py
Open the folder on GitHubat commit 10f9ad7
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in PostHog/posthog, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Diagnosing Stacktrace Symbolication 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 |
|---|---|---|---|---|---|---|
| Diagnosing Stacktrace Symbolication this skillPostHog/posthog | 40k | — | ~2.2k | Automated safety check: Pass | Custom licence | |
| Mobile App Debuggingsecondsky/claude-skills | 227 | — | ~513 | Automated safety check: Pass | MIT | |
| Code Guidelinesgetsentry/sentry-react-native | 1.8k | — | ~3.2k | Automated safety check: Pass | MIT | |
| Simulator Audio E2Ehyochan/react-native-nitro-sound | 961 | — | ~1.1k | Automated safety check: Pass | MIT | |
| Argent Metro Debuggerbbplayer-app/BBPlayer | 1.1k | — | ~3.4k | Automated safety check: Pass | MIT | |
| Code Review React Nativetalsec/Free-RASP-ReactNative | 175 | — | ~3.7k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Diagnosing Stacktrace Symbolication
What does Diagnosing Stacktrace Symbolication do?
Help users debug PostHog Error Tracking stack-trace symbolication for any supported platform — JavaScript/TypeScript web, React Native (Hermes), Android (Proguard / R8), or iOS / macOS (dSYM). Diagnosing Stacktrace Symbolication is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Help users debug PostHog Error Tracking stack-trace symbolication for any supported platform — JavaScript/TypeScript web, React Native (Hermes), Android (Proguard / R8), or iOS / macOS (dSYM).
When should I use Diagnosing Stacktrace Symbolication?
Diagnosing Stacktrace Symbolication fits situations like: stack frames stay minified; obfuscated after symbols are uploaded; postHog symbol sets show lastused but frames are not readable; DSYM UUIDs do not match.
How do I install Diagnosing Stacktrace Symbolication in Claude Code?
Run `npx skills add PostHog/posthog --skill diagnosing-stacktrace-symbolication -a claude-code`. Or copy the skill folder (products/error_tracking/skills/diagnosing-stacktrace-symbolication in PostHog/posthog) into .claude/skills/diagnosing-stacktrace-symbolication in your project. Claude Code loads it when a task matches its description.
How do I install Diagnosing Stacktrace Symbolication in Codex?
Run `npx skills add PostHog/posthog --skill diagnosing-stacktrace-symbolication -a codex`. Or copy the skill folder (products/error_tracking/skills/diagnosing-stacktrace-symbolication in PostHog/posthog) into .agents/skills/diagnosing-stacktrace-symbolication in your project. Codex loads it when a task matches its description.
Can I use Diagnosing Stacktrace Symbolication 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 PostHog/posthog --skill diagnosing-stacktrace-symbolication -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/diagnosing-stacktrace-symbolication, .gemini/skills/diagnosing-stacktrace-symbolication, .github/skills/diagnosing-stacktrace-symbolication and .opencode/skills/diagnosing-stacktrace-symbolication in your project.
What does Diagnosing Stacktrace Symbolication need to run?
Going by SKILL.md and its folder, Diagnosing Stacktrace Symbolication needs Python for the scripts in its folder. Our summary lists: Python 3; Node.js.
Does Diagnosing Stacktrace Symbolication access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Diagnosing Stacktrace Symbolication 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 Diagnosing Stacktrace Symbolication use?
Diagnosing Stacktrace Symbolication has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Diagnosing Stacktrace Symbolication use?
About 2.2k tokens (SKILL.md is roughly 8.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.8k tokens, read only when the agent opens those files.
What are the alternatives to Diagnosing Stacktrace Symbolication?
Skills that share tags, products or a category with Diagnosing Stacktrace Symbolication: Mobile App Debugging (secondsky/claude-skills, 227 stars), Code Guidelines (getsentry/sentry-react-native, 1.8k stars), Simulator Audio E2E (hyochan/react-native-nitro-sound, 961 stars) and Argent Metro Debugger (bbplayer-app/BBPlayer, 1.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Diagnosing Stacktrace Symbolication?
PostHog (a GitHub organization, an official publisher) maintains it in PostHog/posthog, which has 40,182 GitHub stars. The repository holds 252 skills in this directory. The repository was last updated on October 8, 2026.
Source: PostHog/posthog on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.