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Agent skill

Dart Log Failure Parser

by flutter in flutter/flutter

Parse failures from Dart and Flutter test logs. An agent skill from flutter/flutter.

BSD-3-ClauseAuto-check passedMobile

Install Dart Log Failure Parser

skills CLI
$ npx skills add flutter/flutter --skill dart-log-failure-parser -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install flutter/flutter dart-log-failure-parser --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/flutter/flutter.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/dart-log-failure-parser .claude/skills/dart-log-failure-parser && rm -rf skills-src

Use ~/.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/

Facts

Skill name
dart-log-failure-parser
GitHub stars
179k
Token cost
~489 tokens
SKILL.md length
169 words
Files
1
Skills in repo
14
Repo updated
First seen
Licence
BSD-3-Clause

At a glance

Parse failures from Dart and Flutter test logs. An agent skill from flutter/flutter.

  • Works in 2 steps: Analyze Raw Log Output → Look for Failure Patterns
  • Tasks that involve Cross-platform mobile apps
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Dart Log Failure Parser is an agent skill from flutter/flutter. Parse failures from Dart and Flutter test logs.

Its SKILL.md is about 490 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Mobile, covering Cross-platform mobile apps. It works with Dart, Flutter and Linux. The repository describes itself as: Flutter makes it easy and fast to build beautiful apps for mobile and beyond. The licence is BSD-3-Clause.

When your agent uses it

  • Tasks that involve Cross-platform mobile apps

Example prompts

  • “/dart-log-failure-parser”

Workflow steps

2 steps, taken from the step headings in SKILL.md.

  1. Analyze Raw Log Output
  2. Look for Failure Patterns

What it can do on your machine

Read from SKILL.md and the folder at commit 8679894. 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

    No scripts in the folder and no shell commands in SKILL.md (its code samples are json).

    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

Dart Log Failure Parser loads about 489 tokens when it runs. Until then it costs about 18 tokens; SKILL.md has 169 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~18
When it runs · the whole SKILL.md, loaded when a task matches
~489

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); files beside SKILL.md are not scanned.

SKILL.md

The full file from flutter/flutter at commit 8679894, republished under its BSD-3-Clause licence (© flutter). 169 words, ~489 tokens.

Download SKILL.mdSave it as .claude/skills/dart-log-failure-parser/SKILL.md (or your agent's skills folder).
name
dart-log-failure-parser
description
Parse failures from Dart and Flutter test logs.

Dart Log Failure Parser

Workflow

1. Analyze Raw Log Output

Analyze the raw log output for failure details. Do not skim the output; check the entire log. The description of findings should include specific details for the failures (e.g., unformatted files, specific test names), not just the top-level command that failed.

2. Look for Failure Patterns
Pattern A: Error Blocks (e.g., Linux Analyze)

Search for blocks starting with ╡ERROR #. Example:

╔═╡ERROR #1╞════════════════════════════════════════════════════════════════════
║ Command: bin/cache/dart-sdk/bin/dart --enable-asserts /b/s/w/ir/x/w/flutter/dev/bots/analyze_snippet_code.dart --verbose
║ Command exited with exit code 255 but expected zero exit code.
║ Working directory: /b/s/w/ir/x/w/flutter
╚═══════════════════════════════════════════════════════════════════════════════
Pattern B: Task Result JSON

Search for "Task result:" followed by a JSON object. Example:

json
Task result:
{
  "success": false,
  "reason": "Task failed: PathNotFoundException: Cannot open file..."
}
Pattern C: Failing Tests List

For general Dart tests, look for a list at the end of the log starting with "Failing tests:". Example:

Failing tests:
  test/general.shard/cache_test.dart: FontSubset artifacts for all platforms on arm64 hosts
  test/general.shard/cache_test.dart: FontSubset artifacts on arm64 linux
Pattern D: Build Failures

For build failures (e.g., engine tests failing at compile time), look for the following indicators in the logs or API summaries:

  • Lines starting with FAILED: (indicates a Ninja target failed).
  • Compiler error messages (e.g., error:, fatal error:).
  • Linker error messages (e.g., undefined reference to).
  • Summary messages in the check-runs API output like 1 build failed: [<build_name>].

© flutter, BSD-3-Clause. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/dart-log-failure-parser of flutter/flutter.

Open the folder on GitHubat commit 8679894

Compare with similar skills

Dart Log Failure Parser 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.

Dart Log Failure Parser compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Dart Log Failure Parser this skillflutter/flutter179k—~489Automated safety check: PassBSD-3-Clause
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Gui Testlibnativeapi/nativeapi161—~3.5kAutomated safety check: PassMIT
Fkit SetupJoker-x-dev/FlutterKit127—~720Automated safety check: PassMIT
Native Desktop UI TestingFNOSP/FlyNarwhal495—~2.4kAutomated safety check: PassAGPL-3.0
Flutter Pub ReleaseMixinNetwork/flutter-plugins512—~1.3kAutomated safety check: PassMIT

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Works with

Categories

Questions about Dart Log Failure Parser

What does Dart Log Failure Parser do?

Parse failures from Dart and Flutter test logs. An agent skill from flutter/flutter. Dart Log Failure Parser is an agent skill from flutter/flutter. Parse failures from Dart and Flutter test logs.

When should I use Dart Log Failure Parser?

Dart Log Failure Parser fits situations like: tasks that involve Cross-platform mobile apps.

How do I install Dart Log Failure Parser in Claude Code?

Run `npx skills add flutter/flutter --skill dart-log-failure-parser -a claude-code`. Or copy the skill folder (.agents/skills/dart-log-failure-parser in flutter/flutter) into .claude/skills/dart-log-failure-parser in your project. Claude Code loads it when a task matches its description.

How do I install Dart Log Failure Parser in Codex?

Run `npx skills add flutter/flutter --skill dart-log-failure-parser -a codex`. Or copy the skill folder (.agents/skills/dart-log-failure-parser in flutter/flutter) into .agents/skills/dart-log-failure-parser in your project. Codex loads it when a task matches its description.

Can I use Dart Log Failure Parser 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 flutter/flutter --skill dart-log-failure-parser -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/dart-log-failure-parser, .gemini/skills/dart-log-failure-parser, .github/skills/dart-log-failure-parser and .opencode/skills/dart-log-failure-parser in your project.

What does Dart Log Failure Parser need to run?

SKILL.md names no scripts, command-line tools or credentials: Dart Log Failure Parser is instructions for the agent only.

Does Dart Log Failure Parser 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 Dart Log Failure Parser 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. Review the folder before installing.

What licence does Dart Log Failure Parser use?

Dart Log Failure Parser is published under the BSD-3-Clause licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Dart Log Failure Parser use?

About 489 tokens (SKILL.md is roughly 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 Dart Log Failure Parser?

Skills that share tags, products or a category with Dart Log Failure Parser: flutter_soloud Setup (alnitak/flutter_soloud, 424 stars), Gui Test (libnativeapi/nativeapi, 161 stars), Fkit Setup (Joker-x-dev/FlutterKit, 127 stars) and Native Desktop UI Testing (FNOSP/FlyNarwhal, 495 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Dart Log Failure Parser?

flutter (a GitHub organization) maintains it in flutter/flutter, which has 179,369 GitHub stars. The repository holds 14 skills in this directory. The repository was last updated on October 8, 2026.

Source: flutter/flutter on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.