write-app-change-log

name	write-app-change-log
description	Generates and updates the latest app changelog based on git history since the last version tag.

Write App Change Log

This skill automates the process of creating a concise and meaningful changelog for the app.

Workflow

1. Fetch Latest Tags:

   • Ensure all tags are fetched from the remote repository.
   • Example: git fetch --tags origin

2. Identify the Base Tag:

   • Find the latest git tag that matches the pattern v*.
   • Example: git tag -l "v*" --sort=-v:refname | head -n 1

3. Collect Commits:

   • Get all commits from the identified tag to the current HEAD.
   • For each commit, collect the title and the full description.
   • Example: git log <base-tag>..HEAD --pretty=format:"%s%n%b%n---"

4. Filter App-Related Commits:

   • Analyze the commit messages and files changed.
   • Exclude commits that primarily affect:
     • Repository infrastructure (e.g., .github/, scripts/, fastlane/ except changelogs).
     • CI/CD pipelines (e.g., workflow YAML files, Dockerfiles).
     • Build tools configuration (unless it directly impacts app behavior).
     • Internal documentation or maintenance (e.g., README.md, AGENTS.md, task.md, implementation_plan.md).
   • Include commits that modify:
     • App source code (app/, database/, network/).
     • Resources (strings.xml, UI layouts).
     • User-facing features or bug fixes.

5. Identify Meaningful Changes:

   • From the filtered list, select the 2-5 most significant changes.
   • Focus on what is most impactful for the end-user (new features, major bug fixes, performance improvements).

6. Match Style and Tone:

   • Read the existing changelogs in fastlane/metadata/android/en-US/changelogs/.
   • Identify the highest numbered file (e.g., 9.txt).
   • Analyze the language, tone, and formatting of recent entries.
   • Maintain the same concise and professional style.
   • Usually, the format is: Welcome to Janus <version-name> (<version-code>) followed by bullet points if multiple changes are listed, or a single descriptive sentence.

7. Update the Latest Changelog:

   • Take the identified meaningful changes.
   • Draft the new content matching the established style.
   • Update the highest numbered file in fastlane/metadata/android/en-US/changelogs/ with the new content.

Guidelines

• Be concise.
• Focus on user value.
• Avoid technical jargon unless necessary.
• Ensure the version name and code in the changelog match the current project state (can be found in app/build.gradle.kts or similar).