gdd-migrate

name	gdd-migrate
description	Migrates a project off GDD's own deprecated paths after an upgrade. Reads the machine-readable registry in reference/DEPRECATIONS.md (via scripts/lib/deprecation-registry.cjs), scans the project's .design/config.json + any local skill/agent references for paths that are now deprecated or removed at the installed version, and PREVIEWS a diff before changing anything. Interactive by default (confirm per change); --yes auto-applies; --dry-run previews only. Read-first, never silent. Use after /gdd:update flags a breaking change.
argument-hint	[--yes] [--dry-run]
user-invocable	true
tools	Read, Write, Bash, Grep, Glob

/gdd:migrate

Closes the GDD-on-GDD gap: when GDD moves or removes its own paths (e.g. the Phase 31.5 scripts/lib/** → sdk/** reorg), a project that referenced the old paths needs updating. This skill consults the deprecation registry, finds the stale references in this project, and rewrites them - after showing you the diff. It never edits silently. Contract: ../../reference/DEPRECATIONS.md.

Invocation

Command	Behavior
/gdd:migrate	Scan + preview every applicable migration, then confirm each before applying.
/gdd:migrate --dry-run	Preview only - print the diff, change nothing.
/gdd:migrate --yes	Apply every applicable migration without the per-change prompt (still prints what changed).

Steps

1. Resolve the installed version from .claude-plugin/plugin.json (version).

2. Load the registry. Parse reference/DEPRECATIONS.md with the pure helper:

   node -e '
     const fs = require("fs");
     const dr = require("./scripts/lib/deprecation-registry.cjs");
     const entries = dr.parseDeprecations(fs.readFileSync("reference/DEPRECATIONS.md","utf8"));
     const version = require("./.claude-plugin/plugin.json").version;
     // Only entries that are deprecated/removed at the installed version are actionable.
     const actionable = entries.filter(e => dr.classify(e, version) !== "pending");
     console.log(JSON.stringify({ version, actionable }));
   '
   

3. Scan the project for each actionable entry's Old path:

   • .design/config.json (string values referencing an old path),
   • project-local skill/agent references (grep the repo, excluding .git/, node_modules/, and GDD's own reference/DEPRECATIONS.md),
   • any require(...)/import of a removed SDK path. For a code rewrite, scaffold the edit with scripts/lib/migration/codemod-gen.cjs (Phase 39.1) - you emit the change as a reviewable patch, you do not run a codemod engine.

4. Preview. Print a unified-diff-style preview per file: Old → New, the registry status (deprecated vs removed), and the migration hint. If --dry-run, stop here.

5. Confirm + apply. Without --yes, ask per change. With --yes, apply all. Use Write to make the edits; never touch a file the user didn't consent to.

6. Report. Summarize: files changed, references rewritten, and any removed-status reference that still has no replacement wired (flag it loudly - that one breaks at the installed version).

Boundaries

• Preview-first. Nothing changes before you've shown the diff (or --yes was passed).
• Migrates this project's references to GDD paths - it does not rewrite GDD's own source, and it never performs a downgrade (reverse migrations are out of scope).
• Read the registry; never invent a migration that isn't in reference/DEPRECATIONS.md.

Record

Print a ## Migration summary (version, actionable entries, files changed, unresolved removed references) and append one JSONL line to .design/intel/insights.jsonl recording the migration run. Close with:

## MIGRATE COMPLETE