Name: dart-setup-ffi-assets
Rating: 72 (1 reviews)
Author: flutter

dart-setup-ffi-assets

Guides agents in compiling and packaging C/C++ source code into dynamic or static libraries (Code Assets) using Dart's Native Assets hook system (via hook/build.dart and hook/link.dart utilizing package:hooks and package:native_toolchain_c). Use when a user asks to: 'setup native assets', 'compile C/C++ source code', 'bundle dynamic libraries', 'build native C code', 'link native assets', 'implement build.dart or link.dart hooks', or 'integrate C/C++ interop in Dart/Flutter'. Helps agents avoid manual toolchain orchestration and configures secure hash-validated binary downloads or advanced linker tree-shaking with package:record_use mapping.

Quality

88%

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Securityby

Critical

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Quality

Content

77%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A detailed, highly actionable skill with complete executable code and a strong verification workflow, but it is a monolithic, somewhat verbose document whose length and inline detail could be reduced and offloaded to reference files.

Suggestions

Trim conceptual prose that restates knowledge Claude already has — e.g. the 'Why Download Precompiled Binaries?' rationale and the Introduction's explanation of the Native Assets feature — to lift the conciseness score.

Split the monolithic body into one-level-deep reference files (e.g. move the full Method 2 download implementation and the detailed tree-shaking verification procedures into separate referenced files), keeping SKILL.md as a concise overview with well-signaled links, to improve progressive disclosure.

Move the per-platform verification commands (nm/dumpbin) into a reference table or script rather than inlining all three platform variants in the main body.

Dimension	Reasoning	Score
Conciseness	Mostly efficient with substantial executable code, but explanatory passages like the 'Why Download Precompiled Binaries?' bullets ('Precompiled downloads execute in milliseconds compared to potentially long multi-minute compilation processes') and the Introduction rationale restate concepts Claude already knows; not a 3 because it could be tightened, not a 1 because the bulk is actionable rather than padded.	2 / 3
Actionability	Provides complete, executable Dart for hook/build.dart, hook/link.dart, c_library.dart, download.dart, and hashes.dart plus concrete commands (dart pub add, nm -gU, dumpbin /EXPORTS) that are copy-paste ready; not a 2 because the code is real and complete rather than pseudocode.	3 / 3
Workflow Clarity	Clear Step-by-Step Workflow (Steps 1-4) and a Verification Checklist with explicit checkpoints (symbol-stripping confirmation, hash-mismatch exception, offline-compliance steps); not a 2 because validation and feedback loops are explicit rather than implicit.	3 / 3
Progressive Disclosure	Has a clear TOC and well-organized sections, but it is a monolithic ~420-line body with no bundle files and detailed content (full Method 2 download implementation, tree-shaking verification procedures) inlined that could be split into one-level-deep references; not a 3 because content is not split and no references exist, not a 1 because organization is clear rather than poor.	2 / 3
	Total	10 / 12 Passed

Description

100%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, specific description that clearly states concrete capabilities and provides explicit, natural-language use-when triggers scoped to a distinctive Dart native-assets niche. It is somewhat long, but every clause supports a concrete action or trigger.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions — 'compiling and packaging C/C++ source code into dynamic or static libraries', 'secure hash-validated binary downloads', and 'advanced linker tree-shaking with package:record_use mapping' — matching the 'lists multiple specific concrete actions' anchor; not a 2 because the actions are comprehensive rather than partial.	3 / 3
Completeness	Explicitly answers both what ('Guides agents in compiling and packaging C/C++ source code...') and when ('Use when a user asks to: ...') with explicit triggers, and uses third-person voice; not a 2 because the 'when' is explicit rather than implied.	3 / 3
Trigger Term Quality	Provides good coverage of natural phrases a user would say — 'setup native assets', 'compile C/C++ source code', 'bundle dynamic libraries', 'build native C code', 'link native assets', 'integrate C/C++ interop in Dart/Flutter'; not a 2 because it covers common variations rather than only a few keywords.	3 / 3
Distinctiveness Conflict Risk	Tightly scoped to Dart's Native Assets hooks (build.dart/link.dart, package:hooks, package:native_toolchain_c), giving it a clear niche unlikely to conflict with other skills; not a 2 because the triggers are highly specific rather than overlapping.	3 / 3
	Total	12 / 12 Passed

Validation

93%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

Criteria	Description	Result
metadata_version	'metadata.version' is missing	Warning

	Total	15 / 16 Passed

Repository: flutter/agent-plugins
Path: skills/dart-setup-ffi-assets/SKILL.md
Commit: 8aaa41d

Reviewed: about 12 hours ago

Table of Contents

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