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/chunkytofustudios/flutter-skills/symbolize-android-stacktracenpx skills add ChunkyTofuStudios/flutter-skills --skill symbolize-android-stacktracegit clone --depth 1 https://github.com/ChunkyTofuStudios/flutter-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/chunkytofustudios/flutter-skills/symbolize-android-stacktrace)<a href="https://agentmods.dev/skills/chunkytofustudios/flutter-skills/symbolize-android-stacktrace"><img src="https://agentmods.dev/badge/skills/chunkytofustudios/flutter-skills/symbolize-android-stacktrace.svg" alt="Measured on agentmods" height="20"></a>What 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 | $0.00217 | $0.03735 |
| Opus 5 | $0.00109 | $0.01868 |
| Sonnet 5 | $0.00043 | $0.00747 |
| Haiku 4.5 | $0.00022 | $0.00374 |
Grade A, and why
symbolize-android-stacktrace 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 5d 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 — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Symbolize Android stacktrace (Flutter + Codemagic)
Turn an obfuscated Google Play Console crash/ANR stacktrace into a symbolized one (file + line for every native and Flutter frame), so you can reason about the bug.
When to use this
All three must hold — if any is false, this skill is the wrong tool:
- The app is a Flutter app targeting Android.
- The trace was exported from the Google Play Console (Crash dashboard or ANR dashboard) — typically a
.txt/.logwithpc 0x…frames, optionally a# Application:/# Version:header. - The release build was produced by Codemagic CI/CD, with the workflow uploading both
android_native_debug_symbols.zipand<AppName>_<N>_artifacts.zip(Flutter's split-debug-info.symbolsfiles) as build artefacts. Without those, there is nothing to match the obfuscated PCs against.mapping.txt(R8/ProGuard) is also pulled when present — it lets the symbolizer turnKa.n.l+8style Java frames back intoio.flutter.embedding.engine.FlutterJNI.onSurfaceDestroyed, which is the difference between a readable Java side and a wall of obfuscated names.
If you're unsure whether the build was from Codemagic, check codemagic.yaml at the repo root or ask the user.
Setup (caller's machine)
| Requirement | How to satisfy |
|---|---|
| Codemagic API key | Generate at Codemagic → User settings → Integrations → Personal API token. Provide it via either: (a) CODEMAGIC_API_KEY env var, or (b) a .codemagic-api-key file at the repo root containing the key as plaintext — the script walks up from CWD and stops at the .git boundary. The file is convenient for teams who want a shared key checked into a private repo; accept that risk before doing it. |
Android NDK with llvm-addr2line |
Default lookup: ~/Library/Android/sdk/ndk/27.3.13750724. Override with ANDROID_NDK_HOME=/path/to/ndk. Any recent NDK ships llvm-addr2line and llvm-readelf. |
unzip, python3 (3.10+), bash |
Standard. The Python script uses stdlib only. |
What ships with it
15 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- scripts/codemagic_fetch_artifacts.py 22 KB runs code
- scripts/deobfuscate_r8.py 6.3 KB runs code
- scripts/symbolize_flutter_anr.sh 23 KB runs code
- tests/classification.bats 3.4 KB
- tests/fixtures/flutter/app.android-arm64.symbols 21 B
- tests/fixtures/mapping.txt 727 B
- tests/fixtures/not-a-trace.txt 119 B
- tests/help.bats 762 B
- tests/helpers.bash 1.4 KB runs code
- tests/metachars.bats 3.5 KB
- tests/stubs/ndk/toolchains/llvm/prebuilt/bats-host/bin/llvm-addr2line 1.1 KB
- tests/stubs/ndk/toolchains/llvm/prebuilt/bats-host/bin/llvm-readelf 928 B
- tests/symbolize.bats 6.5 KB
- tests/test_codemagic_fetch.py 18 KB runs code
- tests/test_deobfuscate_r8.py 6.6 KB runs code
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.
- 5d ago First seen · 168 lines · 217 tokens per session scan A ebeb414f5610
symbolize-android-stacktrace is a skill published in the GitHub repository ChunkyTofuStudios/flutter-skills (5 stars, last pushed 3mo ago), licensed MIT. It adds 217 tokens to every session and 3,735 once invoked, about $0.0011 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.
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