Update Git Workflow

Follow runtime compatibility. Claude Code users invoke this as /update; Codex users invoke it as $update.

1. Parse options

• --dry-run: calculate and display changes without writing.
• --prune: include previously managed files that no longer exist in the source as removal candidates.
• --force: overwrite customized managed files after still showing their diffs.
• --host <claude|codex|both>: synchronize only the selected host assets; otherwise infer installed hosts and ask if ambiguous.
• --source <path-or-git-url>: use an explicit Git Workflow checkout, plugin directory, or Git URL.

Unknown options are errors. Destructive pruning is never implied by --force alone.

2. Resolve project and source

Resolve the project root from Git, then accept either .git-workflow/, .claude/, or .codex/ as evidence of an existing installation. Resolve the source in this order:

1. --source
2. {PACKAGE_ROOT}, derived from the absolute physical directory containing this loaded SKILL.md as {SKILL_DIR}/../.., when it contains .codex-plugin/plugin.json
3. PLUGIN_ROOT, then CLAUDE_PLUGIN_ROOT, as compatibility fallbacks only when the host cannot expose the loaded skill path; verify the manifest before accepting either value
4. source recorded in .git-workflow/version.json

Never substitute an empty package variable or silently fall back to /scripts. If no complete source resolves, stop before writing and report every candidate checked.

For an explicit Git URL, clone it shallowly into a newly created temporary directory, validate it, and remove the temporary clone on success or failure. Do not perform a default network clone when an installed package root or ledger source is available. Validate that the source contains skills/, agents/, .codex/agents/, and a valid .codex-plugin/plugin.json. Stop without writing if it is incomplete.

3. Build the synchronization set

Use the synchronizer bundled with setup, resolved relative to this skill as {SKILL_DIR}/../setup/scripts/sync-project.mjs, to calculate and apply this set. Always run it first with --dry-run; after the user reviews changes, rerun without --dry-run. Add --force only when changed files were approved, and add --confirm-prune only after separate confirmation of listed prune candidates.

node "{SKILL_DIR}/../setup/scripts/sync-project.mjs" --source <source> --target <project> --host <codex|claude|both> --dry-run

Synchronize only components relevant to the installation:

Codex plugin skills are updated by the plugin manager and must not be copied into .codex/skills/ by this workflow.

For every target, classify it as missing (+), changed (~), identical (=), or orphaned (?). Show a unified diff for changed text files.

4. Protect customizations

• Without --force, ask once before overwriting the listed changed files. A rejection preserves all changed files while still allowing missing files to install.
• With --force, overwrite changed managed files only after showing the summary.
• --prune may remove only paths recorded as managed in the version ledger. Never remove an untracked local skill or agent merely because the source lacks the same name.
• Show prune candidates and require explicit confirmation even with --force.
• --dry-run performs no writes, removals, directory creation, or ledger updates.

Use atomic per-file replacement where practical. A failure must not truncate the previous target.

5. Migrate and record state

If .git-workflow/config.yaml is absent and .claude/config.yaml exists, offer the same non-destructive copy used by $setup; do not make migration a prerequisite for updating agents.

After a successful non-dry-run update, the synchronizer rewrites .git-workflow/version.json with version 2.5.2, the resolved source, timestamp, hosts, and the exact relative paths managed by this run. Preserve the user's workflow configuration, local hook opt-in, PR context, status report, and reviewed-SHA ledger.

Output

Report installed, updated, unchanged, preserved, pruned, and failed files separately. If any item fails, return a non-success summary with the exact recovery command. Otherwise suggest /status for Claude Code or $status for Codex.