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Writing Claude Code Skills for HASH · microck | DecimalAI

agent toolingby microck

Writing Claude Code Skills for HASH

microck/writing-skills

Source microck/ordinary-claude-skills ↗License NOASSERTION

Create and manage Claude Code skills in HASH repository following Anthropic best practices.

SkillScore87Maintained

Automatic

AI Engineer pack

Last verified 8/21/2026

What it changes

Passed 17 of 19 test cases with the skill, and 7 of 19 without it.

Without skill39%

With skill87%

Checks it passed that the model alone missed

Sets the enforcement field to suggest within the rule entry.
Specifies setting the environment variable SKILL_DEBUG to true.
Specifies placing the skill file in .claude/skills/<skill-name>/SKILL.md.

and 16 more in the full report

13 fixed7 passed either way1 still failing2 broke

Pass-rate lift: +48 pp
Tokens: +130%
Agent turns: 0%
Response time: -44%

Model gemini-3.6-flashMeasured 8/21/2026v120 of 23 cases passed with skill · 19 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/microck-writing-skills/SKILL.md https://app.decimal.ai/s/microck-writing-skills/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add microck-writing-skills, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/microck-writing-skills/ and pins it in .decimal/skills.lock

decimalai skills add microck-writing-skills

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/microck-writing-skills/SKILL.md https://app.decimal.ai/s/microck-writing-skills/SKILL.md

Raw file: /s/microck-writing-skills/SKILL.md ↗ · machine-readable summary at /s/microck-writing-skills.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

What quick terminal command using jq can be executed to validate that `.claude/skills/skill-rules.json` contains valid JSON syntax?

What was checked, without and with the skill
Checked	Without skill	With skill
Recommends running jq . .claude/skills/skill-rules.json to check JSON syntax validity.	Missed	Passed

case-17 · gemini-3.6-flash · 8/21/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md385 linessingle file

Writing Claude Code Skills for HASH

Purpose

Comprehensive guide for creating and managing skills in Claude Code with auto-activation system, following Anthropic's official best practices including the 500-line rule and progressive disclosure pattern.

When to Use This Skill

Automatically activates when you mention:

Creating or adding skills
Modifying skill triggers or rules
Understanding how skill activation works
Debugging skill activation issues
Working with skill-rules.json
Hook system mechanics
Claude Code best practices
Progressive disclosure
YAML frontmatter
500-line rule

System Overview

Current Implementation

UserPromptSubmit Hook (Proactive Suggestions)

File: .claude/hooks/skill-activation-prompt.ts
Trigger: BEFORE Claude sees user's prompt
Purpose: Suggest relevant skills based on keywords + intent patterns
Method: Injects formatted reminder as context (stdout → Claude's input)
Use Cases: Topic-based skills, implicit work detection
Debug: Run with SKILL_DEBUG=true to see matching logic
Validation: Run with --validate flag to check configuration

Configuration File

Location: .claude/skills/skill-rules.json

Track record

Benchmark

17 / 19

test cases passed, vs 7 / 19 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

microck / ordinary-claude-skills

skills_all/writing-skills/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

dokhacgiakhoa/skill-developerCreate and manage Claude Code skills following Anthropic best practices. Use when creating new skills, modifying skill-rules.json, understanding trigger patterns, working with hooks, debugging skill activation, or implementing progressive disclosure. Covers skill structure, YAML frontmatter, trigger types (keywords, intent patterns, file paths, content patterns), enforcement levels (block, suggest, warn), hook mechanisms (UserPromptSubmit, PreToolUse), session tracking, and the 500-line rule.Close match+50 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Writing Claude Code Skills for HASH

Purpose

When to Use This Skill

System Overview

Current Implementation

Configuration File

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills