fix(icp-cli): document valid canister-level fields per config style

[marc0olo]

Summary

• Add pitfall #12 warning against mixing canister-level fields across recipe and bare-build config styles (e.g. putting candid: at canister level alongside a recipe, using non-existent init_arg_file instead of init_args.path)
• Link to the icp-cli configuration reference from the pitfall and the llms.txt index from the Additional References section
• Add adversarial eval "mixing fields across config styles" — scores 4/4 with skill, 0/4 without

Closes #109

[github-actions]

Skill Validation Report

Validating skill: /home/runner/work/icskills/icskills/skills/icp-cli

Structure

• Pass: SKILL.md found
• Pass: all files in references/ are referenced

Frontmatter

• Pass: name: "icp-cli" (valid)
• Pass: description: (507 chars)
• Pass: license: "Apache-2.0"
• Pass: metadata: (2 entries)

Markdown

• Pass: no unclosed code fences found

Tokens

File	Tokens
SKILL.md body	3,947
references/binding-generation.md	764
references/dev-server.md	690
references/dfx-migration.md	1,921
Total	7,322

Content Analysis

Metric	Value
Word count	1,987
Code block ratio	0.20
Imperative ratio	0.12
Information density	0.16
Instruction specificity	0.80
Sections	17
List items	48
Code blocks	21

References Content Analysis

Metric	Value
Word count	1,627
Code block ratio	0.21
Imperative ratio	0.15
Information density	0.18
Instruction specificity	0.75
Sections	16
List items	29
Code blocks	8

Contamination Analysis

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

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

References Contamination Analysis

Metric	Value
Contamination level	low
Contamination score	0.03
Primary language category	javascript
Scope breadth	2

• Warning: Language mismatch: shell (1 category differ from primary)

Result: passed

Project Checks

✓ Project checks passed for 1 skills (0 warnings)