Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/thedecipherist/claude-code-mastery/commit-messagesnpx skills add TheDecipherist/claude-code-mastery --skill commit-messagesgit clone --depth 1 https://github.com/TheDecipherist/claude-code-masteryWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00029 | $0.00845 |
| Opus 5 | $0.00015 | $0.00423 |
| Sonnet 5 | $0.00006 | $0.00169 |
| Haiku 4.5 | $0.00003 | $0.00085 |
Grade A, and why
commit-messages scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Commit Message Skill
Generate consistent, informative commit messages following the Conventional Commits specification.
When to Use This Skill
- User asks to "commit", "write a commit message", or "prepare commit"
- User has staged changes and mentions commits
- Before any
git commitcommand
Process
- Analyze changes: Run
git diff --stagedto see what's being committed - Identify the type: Determine the primary change category
- Find the scope: Identify the main area affected
- Write the message: Follow the format below
Commit Message Format
<type>(<scope>): <description>
[optional body]
[optional footer(s)]
Types
| Type | Description | Example |
|---|---|---|
feat |
New feature | feat(auth): add OAuth2 login |
fix |
Bug fix | fix(api): handle null response |
docs |
Documentation only | docs(readme): add setup instructions |
style |
Formatting, no code change | style: fix indentation |
refactor |
Code change, no new feature/fix | refactor(db): extract query builder |
perf |
Performance improvement | perf(search): add result caching |
test |
Adding/fixing tests | test(auth): add login unit tests |
build |
Build system changes | build: update webpack config |
ci |
CI configuration | ci: add GitHub Actions workflow |
chore |
Maintenance tasks | chore(deps): update dependencies |
revert |
Revert previous commit | revert: feat(auth): add OAuth2 |
Scope
The scope should be a noun describing the section of the codebase:
auth,api,db,ui,config- Feature names:
search,checkout,dashboard - Or omit if change is broad
Subject Line Rules
- Use imperative mood: "add" not "added" or "adds"
- Don't capitalize first letter after colon
- No period at the end
- Max 72 characters total
Body (when needed)
- Separate from subject with blank line
- Explain what and why, not how
- Wrap at 72 characters
- Use bullet points for multiple changes
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 127 lines · 29 tokens per session scan A a8c5797359d5
commit-messages is a skill published in the GitHub repository TheDecipherist/claude-code-mastery (545 stars, last pushed 3mo ago), licensed MIT. It adds 29 tokens to every session and 845 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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