fix(asset-canister): fix skill errors, add npm versions and evals

[marc0olo]

Summary

Fixes factual errors in the asset-canister skill, wraps top-level await in code examples, adds npm versions, and creates the first evaluation suite.

Mentions #97, #95, #96, #100.

Changes

Skill (asset-canister/SKILL.md):

• Wrap all await in async function manageAssets() (no top-level await)
• Fix import for fs — was mid-block (invalid ES module syntax), moved to top
• Add npm versions to prerequisites (@icp-sdk/canisters >= 3.5.0, @icp-sdk/core >= 5.0.0)
• Replace all source references with dir (dfx terminology → icp-cli)
• Fix pitfall #1: source → configuration.dir
• Fix pitfall #3: clarify configuration.build is optional, dir must have content
• Add pitfall #7: asset canister Wasm version must be >= 0.30.2 for ic_env cookie support
• Add note in programmatic uploads: shouldFetchRootKey is for Node.js scripts only, browser frontends should use rootKey from ic_env cookie
• Fix custom domain registration: replace "registration is automatic" with the actual validate + POST flow (https://icp0.io/custom-domains/v1/<domain>/validate and POST .../v1/<domain>)
• Remove unrelated Motoko backend canister from icp.yaml example

Evaluations (evaluations/asset-canister.json): New file with 4 output evals + 12 trigger evals

• Programmatic asset upload (Node.js context)
• SPA routing configuration (.ic-assets.json5)
• Asset canister recipe setup (icp.yaml)
• Security: shouldFetchRootKey in Node.js scripts

[github-actions]

Skill Validation Report

Validating skill: /home/runner/work/icskills/icskills/skills/asset-canister

Structure

• Pass: SKILL.md found

Frontmatter

• Pass: name: "asset-canister" (valid)
• Pass: description: (312 chars)
• Pass: license: "Apache-2.0"
• Pass: compatibility: (31 chars)
• Pass: metadata: (2 entries)

Markdown

• Pass: no unclosed code fences found

Links

• Pass: https://github.com/dfinity/sdk/blob/master/src/canisters/frontend/ic-asset/src/security_policy.rs (HTTP 200)

Tokens

File	Tokens
SKILL.md body	3,292
Total	3,292

Content Analysis

Metric	Value
Word count	1,954
Code block ratio	0.42
Imperative ratio	0.14
Information density	0.28
Instruction specificity	0.91
Sections	16
List items	24
Code blocks	13

Contamination Analysis

Metric	Value
Contamination level	low
Contamination score	0.12
Primary language category	shell
Scope breadth	3

• Warning: Language mismatch: config, javascript (2 categories differ from primary)

Result: passed

Project Checks

✓ Project checks passed for 1 skills (0 warnings)