Borrowing it
Nothing to install: this file belongs to Caspian-Sun/claude-code-workflow. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Caspian-Sun/claude-code-workflow/main/.claude/skills/ext-changelog/SKILL.mdgit clone --depth 1 https://github.com/Caspian-Sun/claude-code-workflowWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/caspian-sun/claude-code-workflow/ext-changelog)<a href="https://agentmods.dev/skills/caspian-sun/claude-code-workflow/ext-changelog"><img src="https://agentmods.dev/badge/skills/caspian-sun/claude-code-workflow/ext-changelog/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/caspian-sun/claude-code-workflow/ext-changelog"><img src="https://agentmods.dev/badge/skills/caspian-sun/claude-code-workflow/ext-changelog.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What 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 5.1 | $0.00077 | $0.00893 |
| Opus 5.5 | $0.00031 | $0.00357 |
| Sonnet 5.5 | $0.00015 | $0.00179 |
| Haiku 4.5 | $0.00008 | $0.00089 |
Grade A, and why
ext-changelog 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 2mo 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 — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ext-changelog — Change Impact Report
You are now a code change analyst. Generate a readable impact report for git changes in the specified file/directory over a specified time range.
Difference from /release
/release— oriented toward publishing; outputs a structured changelog for tags/releases/ext-changelog— oriented toward understanding; outputs a human-readable change narrative for weekly reports / handoffs / retrospectives
Execution Approach
Run git log through scripts; AI handles grouping and interpretation — do not let AI reconstruct commits from memory.
Step 1: Get the commit list
bash .claude/skills/ext-changelog/scripts/range-commits.sh [since] [scope] [author]
Parameters (all optional):
since— start date; defaults to7 days ago; also accepts2026-04-01scope— path scope; defaults to.(entire repo)author— author filter; defaults to empty (all authors)
Each output line: hash|date|author|subject
Step 2: Get changed file statistics
bash .claude/skills/ext-changelog/scripts/changed-files.sh [since] [scope]
Output: A/M/D status for each file + its module directory.
Step 3: AI aggregates by module
After reading the script output:
- Group by
workspace/src/features/<module>/prefix - Parse commit messages in
type(scope): descriptionformat - Link to references in
docs/prds//docs/tasks//docs/bug-reports/ - Identify risk areas:
- Large-scale changes (a single commit touching > 10 files)
- Cross-module changes (one commit spanning multiple features)
- Commit messages containing
WIP/TODO/FIXME - Feature commits not linked to any PRD or task
Output Format
# Change Report: 2026-04-10 → 2026-04-17
## Summary
This week the main work was completing the login module, fixing 3 bugs, and refactoring the auth logic.
## Breakdown by Module
### login (12 commits, 5 files added, 3 files modified)
- Added username/password login + remember-me feature
- Added login form component, auth hook, and API wrapper
- PRD: docs/prds/login.md
### auth (3 commits, 2 files modified)
- Refactor: extracted shared auth logic into useAuth hook
- Impact: used by both login and register modules
## Bug Fixes
- Fixed Dashboard blank screen (login token expiry not redirecting)
- Fixed remember-me token not extending its validity period
## Risk Areas
- register page has not been regression-tested since the auth module refactor
- 2 [pending confirmation] items remain in login.md PRD
## Stats
- Total commits: 18
- Files added: 7
- Files modified: 11
- Active contributors: 2 (alice, bob)
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 2mo ago First seen · 101 lines · 77 tokens per session scan A 77e3aceef9d7
ext-changelog is a skill published in the GitHub repository Caspian-Sun/claude-code-workflow (10 stars, last pushed 1mo ago), licensed MIT. It adds 77 tokens to every session and 893 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-31.
Other skills, from other repositories
commit-with-reflection
A Git workflow that creates a Chinese-language report about debugging mistakes, investigation steps, fixes, and lessons learned, then includes that report in a commit. Git is a system for tracking changes to code.
github
Use gh as the primary interface for GitHub data and actions. Keep this skill focused on basic operations and command safety, not maintainer triage strategy.
manuscript-as-code
Treat manuscripts as software: version control, reproducible builds, figure pipelines, CI, and structured repo layout. Helps teams avoid 'finalv7' chaos and ensures submission-ready artifacts.
pdd-small-change
PDD small-change workflow. Use when the person asks for a small, contained change that is easy to undo, such as a typo, a config value or a small fix. Plan it, make it, verify it, one PR.
ship
Prepare or execute an authorized controlled release with verified checks, recovery and an operating owner. Use when a customer increment is ready for deployment.
squid-review
Push the committed feature branch, create or update its PR, then run Product Architect acceptance and PR-Reviewer on it. Output: a clean PR with no blockers, or ONE rollup task. Trigger after a feature's tasks are implemented and committed.