Claude Code Agent Development
anthropics/claude-plugins-official
Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
Checks sync status and invokes the subagent to align repositories if needed.
Install Repo Sync
$ npx skills add GoogleCloudPlatform/magic-modules --skill repo-sync -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install GoogleCloudPlatform/magic-modules repo-sync --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/GoogleCloudPlatform/magic-modules.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/operations/repo-sync .claude/skills/repo-sync && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "repo-sync" agent skill from https://github.com/GoogleCloudPlatform/magic-modules/tree/main/.agents/skills/operations/repo-sync into .claude/skills/repo-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "repo-sync", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/GoogleCloudPlatform/magic-modules/tree/main/.agents/skills/operations/repo-syncType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add GoogleCloudPlatform/magic-modules --skill repo-sync -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install GoogleCloudPlatform/magic-modules repo-sync --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleCloudPlatform/magic-modules.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/operations/repo-sync .agents/skills/repo-sync && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "repo-sync" agent skill from https://github.com/GoogleCloudPlatform/magic-modules/tree/main/.agents/skills/operations/repo-sync into .agents/skills/repo-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "repo-sync", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add GoogleCloudPlatform/magic-modules --skill repo-sync -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install GoogleCloudPlatform/magic-modules repo-sync --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleCloudPlatform/magic-modules.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/operations/repo-sync .cursor/skills/repo-sync && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "repo-sync" agent skill from https://github.com/GoogleCloudPlatform/magic-modules/tree/main/.agents/skills/operations/repo-sync into .cursor/skills/repo-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "repo-sync", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/GoogleCloudPlatform/magic-modules.git --path .agents/skills/operations/repo-sync--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add GoogleCloudPlatform/magic-modules --skill repo-sync -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install GoogleCloudPlatform/magic-modules repo-sync --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleCloudPlatform/magic-modules.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/operations/repo-sync .gemini/skills/repo-sync && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "repo-sync" agent skill from https://github.com/GoogleCloudPlatform/magic-modules/tree/main/.agents/skills/operations/repo-sync into .gemini/skills/repo-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "repo-sync", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install GoogleCloudPlatform/magic-modules repo-syncInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add GoogleCloudPlatform/magic-modules --skill repo-sync -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/GoogleCloudPlatform/magic-modules.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/operations/repo-sync .github/skills/repo-sync && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "repo-sync" agent skill from https://github.com/GoogleCloudPlatform/magic-modules/tree/main/.agents/skills/operations/repo-sync into .github/skills/repo-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "repo-sync", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add GoogleCloudPlatform/magic-modules --skill repo-sync -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install GoogleCloudPlatform/magic-modules repo-sync --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleCloudPlatform/magic-modules.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/operations/repo-sync .opencode/skills/repo-sync && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "repo-sync" agent skill from https://github.com/GoogleCloudPlatform/magic-modules/tree/main/.agents/skills/operations/repo-sync into .opencode/skills/repo-sync/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "repo-sync", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
repo-sync- GitHub stars
- 974
- Token cost
- ~282 tokens
- SKILL.md length
- 152 words
- Files
- 1
- Skills in repo
- 30
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Checks sync status and invokes the subagent to align repositories if needed.
- Works in 3 steps: Check Sync Status → Prompt User if Needed → Execute Sync
- Tasks that involve Subagents
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Repo Sync is an agent skill from GoogleCloudPlatform/magic-modules. Checks sync status and invokes the subagent to align repositories if needed.
Its SKILL.md is about 280 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Agent Workflows, covering Subagents. The repository describes itself as: Add Google Cloud Platform support to Terraform.
When your agent uses it
- Tasks that involve Subagents
Example prompts
- “Use the repo-sync skill to check sync status and invokes the subagent to align repositories if needed”
- “/repo-sync”
Workflow steps
3 steps, taken from the step headings in SKILL.md.
- Check Sync Status
- Prompt User if Needed
- Execute Sync
What it can do on your machine
Read from SKILL.md and the folder at commit e5db069. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Repo Sync loads about 282 tokens when it runs. Until then it costs about 22 tokens; SKILL.md has 152 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 152 words (~282 tokens).
“Use this skill to check if the downstream workspace is synchronized with Magic Modules and to perform the sync if needed.”
- name
- repo-sync
Files
Just SKILL.md in .agents/skills/operations/repo-sync of GoogleCloudPlatform/magic-modules.
Open the folder on GitHubat commit e5db069
Compare with similar skills
Repo Sync next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Repo Sync this skillGoogleCloudPlatform/magic-modules | 974 | — | ~282 | Automated safety check: Pass | Custom licence | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 38k | 8 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Subagent Driven DevelopmentAsvarox/allkaraoke | 261 | 38 repos | ~1.2k | Automated safety check: Pass | None | |
| Dispatching Parallel Agentsultralisp/ultralisp | 258 | 41 repos | ~1.5k | Automated safety check: Pass | None | |
| Paseo Advisor Second Opiniongetpaseo/paseo | 20k | 1 repos | ~756 | Automated safety check: Pass | Custom licence | |
| Task Observerrebelytics/one-skill-to-rule-them-all | 3.2k | 1 repos | ~12k | Automated safety check: Pass | CC-BY-4.0 |
Similar skills
- Official
Subagent Driven Development
Asvarox/allkaraoke
A skill your agent uses when executing implementation plans with independent tasks in the current session
Dispatching Parallel Agents
ultralisp/ultralisp
A skill your agent uses when facing 2+ independent tasks that can be worked on without shared state or sequential dependencies
Paseo Advisor Second Opinion
getpaseo/paseo
Launches one separate agent through Paseo to give a second opinion on the current task, with a self-contained briefing and no permission to edit files.
Task Observer
rebelytics/one-skill-to-rule-them-all
Monitors task execution for skill improvement opportunities.
O2 Review Loop
openobserve/openobserve
Splits a change into planner, coder and independent reviewer roles: you confirm a spec, a subagent implements it, and a separate reviewer checks each round's local WIP commit.
More from GoogleCloudPlatform/magic-modules
All 30 skills in this repoRun Pre Gen Checks
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Run fast static checks that don't require generating downstreams, including git submodule verification, gofmt formatting, YAML linting, template validation (version-guard and unused-tmpl), mmv1 core…
Validate Provider Changes
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Validate that changes to the generated providers don't introduce breaking changes or fields with missing tests or missing documentation.
Add List Resource Workflow
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Opt resource into MMv1 list-resource generation by setting generatelistresource: true and validate it locally with generated tests.
Fetch Nightly Results
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Skill to fetch latest nightly test results and metadata for Beta or GA providers from GCS test-metadata.
Automate Test Triage
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Skill to automatically triage failing tests by reading test-metadata status files, matching GitHub issues, and generating a multi-section failure report.
Dev Overrides
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Configures Terraform CLI with developer overrides to test locally built provider binaries without full Go acceptance tests, enabling rapid plan/apply cycles.
Related
Categories
Questions about Repo Sync
What does Repo Sync do?
Checks sync status and invokes the subagent to align repositories if needed. Repo Sync is an agent skill from GoogleCloudPlatform/magic-modules. Checks sync status and invokes the subagent to align repositories if needed.
When should I use Repo Sync?
Repo Sync fits situations like: tasks that involve Subagents.
How do I install Repo Sync in Claude Code?
Run `npx skills add GoogleCloudPlatform/magic-modules --skill repo-sync -a claude-code`. Or copy the skill folder (.agents/skills/operations/repo-sync in GoogleCloudPlatform/magic-modules) into .claude/skills/repo-sync in your project. Claude Code loads it when a task matches its description.
How do I install Repo Sync in Codex?
Run `npx skills add GoogleCloudPlatform/magic-modules --skill repo-sync -a codex`. Or copy the skill folder (.agents/skills/operations/repo-sync in GoogleCloudPlatform/magic-modules) into .agents/skills/repo-sync in your project. Codex loads it when a task matches its description.
Can I use Repo Sync in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add GoogleCloudPlatform/magic-modules --skill repo-sync -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/repo-sync, .gemini/skills/repo-sync, .github/skills/repo-sync and .opencode/skills/repo-sync in your project.
What does Repo Sync need to run?
SKILL.md names no scripts, command-line tools or credentials: Repo Sync is instructions for the agent only.
Does Repo Sync access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Repo Sync safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Repo Sync use?
Repo Sync has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Repo Sync use?
About 282 tokens (SKILL.md is roughly 1.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Repo Sync?
Skills that share tags, products or a category with Repo Sync: Claude Code Agent Development (anthropics/claude-plugins-official, 38k stars), Subagent Driven Development (Asvarox/allkaraoke, 261 stars), Dispatching Parallel Agents (ultralisp/ultralisp, 258 stars) and Paseo Advisor Second Opinion (getpaseo/paseo, 20k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Repo Sync?
GoogleCloudPlatform (a GitHub organization) maintains it in GoogleCloudPlatform/magic-modules, which has 974 GitHub stars. The repository holds 30 skills in this directory. The repository was last updated on October 7, 2026.
Source: GoogleCloudPlatform/magic-modules on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.