adobe/migrate

stardust:migrate

Apply the target spec authored by direct, the visual canon written by prototype --prep, and the brand-module catalog extracted during prepare-migration to every page in the inventory. Produces a self-contained, deployable static HTML site under stardust/migrated/. Per-page, incremental, idempotent.

migrate is the final stardust phase. Output is platform- agnostic HTML — downstream conversion (AEM EDS, a CMS, a framework) is the job of a separate plugin that consumes migrated/ plus DESIGN.json plus the per-page _meta.json sidecars.

Inputs

• <slug> — optional positional. Migrate just this page. Without it, migrate every page whose status is directed, prototyped, or approved (and not stale).
• --all — migrate every page including stale ones.
• --force — re-migrate every page even when the idempotent skip would skip them.
• --require-approved — refuse to migrate any non-approved page. Default behaviour migrates directed pages too (using Path A′ or Path B per reference/template-and-module-rendering.md); this flag flips approval-gating on.
• --strict-canon — refuse approvals that conflict with canon. Default logs the deviation and continues. Useful for projects where canon discipline matters more than per-template flexibility.
• --clean — delete assets previously bundled but no longer referenced from stardust/migrated/assets/. Off by default (migrate is additive). Implies --force: every page is re-rendered so the run's bundledAssets Set is the complete union of currently-referenced assets — otherwise --clean would risk deleting assets still referenced by idempotent-skipped pages. See reference/asset-bundling.md § Stale asset cleanup.
• --pin-timestamp <ISO8601> — pin the migrate-provenance timestamp so re-runs without source changes produce byte- identical HTML. Default re-uses the current wall clock, which is fine for normal use; CI deployment fingerprinting may want the pin.

The mobile-adapt audit, content-sourcing scan, and placeholder refusal are all mandatory gates — there is no --skip-* or --allow-* flag to bypass them. If a gate refuses a page, the remediation is to fix the proposed file (re-prototype, edit inline, or run an impeccable command) and re-invoke migrate.

Setup

1. Run the master skill's setup (skills/stardust/SKILL.md § Setup).

2. Verify stardust/state.json exists with at least one directed page.

3. Verify project-root DESIGN.md and DESIGN.json exist with DESIGN.json.extensions.canon populated. If canon is empty, recommend $stardust prepare-migration and stop.

4. Verify stardust/canon/ exists with at least header.html, footer.html, canon.css. Otherwise prep hasn't completed; recommend $stardust prepare-migration and stop.

5. Verify stardust/direction.md has an active (not pending) direction.

6. Read state.json.pages[] and partition into:

   • inScope: status directed, prototyped, or approved, stale: false (or --all / explicit <slug>).
   • skipped: everything else, with reason captured.

7. Validate provenance on every in-scope page. Call validateProvenance(page) per skills/stardust/reference/state-machine.md § Provenance validation for every page in inScope. Abort with the helper's error when any page lacks live-render evidence — migrating a synthesized page record produces deployable HTML that misrepresents the source site, the exact failure mode that motivated the validator. Surface Provenance OK on N pages in the migrate-plan output before Phase 1.

8. Mobile-adapt audit on every Path A / Path A′ source. For every page whose render branch consumes a proposed or archetype HTML file (Path A, Path A′ per reference/template-and-module-rendering.md § Render path selection), run the audit per skills/prototype/SKILL.md § Mobile-adapt audit:

   • <meta name="viewport" content="width=device-width, ..."> present, width not pinned to a fixed pixel value.
   • At least one @media (max-width: ...) rule.
   • At least one mobile-targeted breakpoint at ≤ 640px.

   Refuse pages that fail — the audit is mandatory; there is no skip flag. The user fixes the proposed file (re-prototype or chat-driven impeccable command) and re-invokes migrate. Record the audit result per page in the migrate report and in the post-render _meta.json#audit.adapt sidecar. Path B (unique-renders) skips the audit because adapt hasn't run on those pages — a Path B page that needs mobile coverage gets it via $impeccable adapt invoked separately by the user. Surface this distinction in the report so it's not read as a silent skip.

Procedure

Phase 1 — Plan

Print the plan and wait for confirmation when the scope is large:

migrate plan
============

In scope: 127 pages
  Path A  (approved)                6 pages: home, news/post-housing-summit, news, ...
  Path A' (template-applied)      118 pages: 84 article, 5 listing, 11 program, 2 form, 16 static
  Path B  (unique)                  3 pages: 404, search, faq

Skipped:  0 stale, 0 unscoped

DESIGN.md sha:    1a2b3c4
DESIGN.json sha:  5d6e7f8
Canon shas:       header:7g8h9i  footer:9i0j1k  css:1k2l3m

Output:           stardust/migrated/  +  per-page _meta.json sidecars
Idempotent skip:  enabled (run with --force to override)

Reply "go" to proceed.

For 1-3 pages or <slug> invocation, skip the confirmation.

Phase 2 — Per-page render

For each page in scope, follow reference/migration-procedure.md and reference/template-and-module-rendering.md:

• Idempotent skip check first (sha-compare across designMd, designJson, sourceCurrent, sourceProposed, canonShas, archetypeSource).
• Placeholder gate (Path A and Path A′ only — pages with a proposed file or archetype). Refuse when [data-placeholder] elements or non-empty _provenance.unsourcedContent[] are present — the user fills the missing content in the proposed file before re-invoking migrate. No bypass flag.
• Render branch selection (LLM judgment per T&M § Render path selection): A / A′ / B.
• Render per the chosen branch's procedure in T&M.
• Canon application — chrome injection, canon.css injection, deviation logging.
• Module rendering — render module instances via stardust/canon/modules/<id>.html; bespoke slots logged with data-bespoke.
• Apply content-preservation rules per reference/content-preservation.md. Internal-link rewriting always emits migrated-tree paths; missing slugs flagged broken.
• Compose <head> metadata per reference/metadata-and-jsonld.md (five categories; page-type-driven JSON-LD).
• Validate per T&M § Validation contracts. Strict contracts refuse the page; soft contracts log and continue.
• Compute output path per migration-procedure.md § Output path mapping.
• Asset bundling. Scan the final HTML for asset references (six detection shapes per reference/asset-bundling.md § Detection), copy each unique referenced subpath from stardust/current/assets/<subpath> to stardust/migrated/assets/<subpath> (preserving subdir structure), then rewrite every reference to the root-relative form /assets/<subpath>. Cross-page dedup uses a module-level Set seeded from state.json.migrate.bundledAssets[]. Missing source assets warn-and-skip per § Edge cases; the bundle stays internally consistent.
• Write the migrated index.html and the _meta.json sidecar in the same directory. Provenance block as first child of <head>. Record assetsBundled (count of unique asset refs on this page) in _meta.json.

Phase 3 — Sitewide assets and bundle finalisation

Per-page asset bundling already happened in Phase 2 (every referenced media subpath is on disk under stardust/migrated/assets/). Phase 3 fills in the sitewide assets that no individual page references explicitly:

1. Copy stardust/current/assets/logo.<ext> to stardust/migrated/assets/logo.<ext> (only if missing or stale). Record under state.json.migrate.bundledAssets[].

2. Verify favicon variants and font files were generated by prepare-migration Phase 4. If absent, log a warning and continue (the migrated site renders without them, just missing some platform-specific affordances).

3. Add stardust/migrated/robots.txt and sitemap.xml derived from the migrated page inventory per reference/metadata-and-jsonld.md § Sitemap entry.

4. If --clean was passed, compute stale = priorBundle.filter(p => !bundledAssets.has(p)) from state.json.migrate.bundledAssets[] and remove each stale subpath from stardust/migrated/assets/. Record the deletions under state.json.migrate.cleanedAssets[]. Per reference/asset-bundling.md § Stale asset cleanup.

5. Verify portability. The bundle must work via file://, at a webserver root, and at any subpath — "one shape, works everywhere". Run every audit; any non-empty grep output or non-zero fixture exit fails the run with the cited error message:

   # No source-tree escapes
   find stardust/migrated/ -type f -name '*.html' -exec grep -l '\.\./current/' {} +
   # Error: "asset still points outside the migrated tree; rewrite via the
   #   asset-bundling pass per reference/asset-bundling.md § Detection"
   
   # No absolute internal references in attribute values (404 on file:// and subpath)
   grep -rE '(href|src)="/[^/]' stardust/migrated/ --include='*.html'
   # Error: "absolute href `/beers/` will 404 on file:// and on subpath hosts;
   #   rewrite via the page map per migration-procedure.md § Reference shape"
   
   # No absolute internal references in url() (inline style, <style> blocks, CSS)
   grep -rE 'url\(\s*["'\'']?\s*/[^/]' stardust/migrated/ --include='*.html' --include='*.css'
   # Error: "absolute url(/...) reference will 404 on file:// and on subpath hosts;
   #   rewrite via the asset-bundling pass per asset-bundling.md § Rewrite"
   
   # No directory-only nav (doesn't resolve on file://). Pattern accepts
   # only relative or root-absolute hrefs (./, ../, /, or bare segment)
   # so external URLs like https://google.com/ aren't false-flagged.
   grep -rE 'href="(\.{0,2}/|[a-zA-Z0-9_-])[^:"#?]*/"' stardust/migrated/ --include='*.html'
   # Error: "directory-only href `./beers/` won't resolve on file://;
   #   append the explicit index.html (or the source URL's .html leaf)
   #   per § Reference shape"
   
   # pageMap consistency — every internal href appears as an outputPath
   node skills/migrate/fixtures/pagemap-audit.mjs stardust/migrated/ stardust/state.json
   # Error: "internal href has no pageMap entry; link rewriting bypassed the
   #   page map per § Page map (build once, use everywhere)"
   
   # Headless file:// round-trip — the test that proves zip-and-deploy works
   node skills/migrate/fixtures/file-protocol-audit.mjs stardust/migrated/
   # Error: "<offending file> linked <ref> that 404s under file://; see the
   #   Playwright network log printed above"
   

   The audits are mandatory — there is no skip flag. The contract is "self-contained, zip-and-deploy" and these audits are the verifiers that back the claim.

Asset migration is idempotent — files are content-hashed and copied only when missing; per-page bundling deduplicates across the run.

Phase 4 — State and report

Update state.json:

• For each successfully migrated page: status advances to migrated, append a history entry, clear any stale flag, set migratedPath.
• For pages skipped via idempotent skip: leave state unchanged.
• For pages that failed validation: leave state unchanged, log the failure in state.json.lastRun.failures[].
• Write the top-level migrate block per skills/stardust/reference/migrate-output-format.md § State.json contract: selfContained: true, outputDir, totalAssetsBundled, bundledAssets[], per-page assetsBundled counts, missingAssets[], cleanedAssets[]. This is the forward-compat signal downstream consumers test for.

Print the run summary:

migrate complete
================

 122 migrated         home, about, news/post-housing-summit, ...
   3 unchanged        about, programs/shelter, news/post-old (idempotent skip)
   2 failed           contact (validation: required slot missing),
                      legal/privacy (validation: color-reservation violated)
   0 stale skipped

Render branches:
  Path A   6   approved-from-prototype
  Path A'  116 template-applied (84 article, 5 listing, 11 program, 2 form, 14 static)
  Path B   3   unique-render (404, search, faq)

Pages with non-trivial decisions: 12
  about            canon-deviation: footer carries financials disclaimer
  donate           template-adapted: amount-pills slot moved above headline
  ...

Broken internal links: 5
  /events       referenced by 2 pages; not in inventory
  /press        referenced by 1 page; not in inventory
  ...

Bespoke slots crossing promotion threshold: 1
  hotline-211: "state"  (3 instances) — consider `$stardust prepare-migration --refine-module`

Missing assets: 2
  generated/orphan-1.jpg     referenced by 1 page  (home)
  generated/orphan-2.jpg     referenced by 2 pages (about, contact)
  (Re-extract or accept the gap — bundle is deployable; refs 404 at view time.)

Output:  stardust/migrated/  (122 pages, 47 bundled assets, 4.2 MB) — self-contained, zip-and-deploy

Next:
  - Review:    open stardust/migrated/index.html in a browser
  - Audit:     $impeccable critique stardust/migrated/
  - Deploy:    cd stardust/migrated && zip -r ../site.zip .
               upload the zip to any static host that serves at the host root
  - Refine:    edit DESIGN.md or canon files, then re-run $stardust migrate

Outputs

| Path | Purpose | |---------------------------------------------------|--------------------------------------------------------| | stardust/migrated/<source-url-path> | Migrated page. Output path mirrors the source URL literally (see reference/migration-procedure.md § Output path mapping). The bundle is zip-and-deploy: drop on any static host at any path, or open index.html directly via file://. Every internal reference is relative to the page that emits it; nav targets carry an explicit index.html (or the source URL's literal filename) so file:// resolves without a server. | | _meta.json sidecar | Lives next to each migrated page. For <dir>/index.html the sidecar is <dir>/_meta.json; for <dir>/<name>.html the sidecar is <dir>/<name>._meta.json so multiple .html siblings don't collide. Per reference/migration-procedure.md § _meta.json sidecar. | | stardust/migrated/index.html | The home page (special case). | | stardust/migrated/_meta.json | Home sidecar. | | stardust/migrated/assets/logo.<ext> | Brand logo (sitewide). | | stardust/migrated/assets/<subpath> | Every asset referenced by any migrated page, bundled. Source subdir structure preserved verbatim. | | stardust/migrated/assets/favicon.<ext> + variants| Favicon and apple-touch-icon, manifest icons. | | stardust/migrated/assets/fonts/... | Downloaded font files (from canon @font-face URLs). | | stardust/migrated/robots.txt | Minimal robots.txt. | | stardust/migrated/sitemap.xml | Sitemap derived from migrated inventory + page types. | | stardust/state.json | Updated with migrated status, history, and the migrate block (selfContained: true, asset counts). |

Idempotent and incremental

The whole pipeline is built around two properties:

• Idempotent. Re-running $stardust migrate with no changes produces zero file writes. Every page is sha-compared across designMd, designJson, sourceCurrent, sourceProposed (Path A), canonShas, archetypeSource (Path A′) — and skipped if all match.
• Incremental. Migrate 5 pages today, 20 pages tomorrow, fix one page's content next week — the migrated tree is always the union of every successful migration to date.

These properties hold even when DESIGN.md, canon, or modules are edited mid-run: the edit changes the relevant sha, so the next migrate run re-renders every affected page (canon and DESIGN.md edits typically affect every page).

Stale handling

When direction.md, canon, or the module catalog changes after some pages have been migrated:

• Affected pages are flagged stale: true per skills/stardust/reference/state-machine.md § Stale flagging. Stale-flagging is content-aware in all three trigger cases.
• $stardust migrate (no flags) skips stale pages and reports the count.
• $stardust migrate --all re-migrates each stale page, clearing the flag on success.
• $stardust migrate <slug> always operates on the named page, stale or not.

The user decides whether stale pages should be refreshed — direction/canon/module changes don't invalidate prior migrated work, they just mark it as out-of-step.

Failure modes

• No directed pages. Recommend $stardust direct (or $stardust extract if no extracted state).
• No DESIGN.md, DESIGN.json, or canon. Recommend $stardust prepare-migration.
• Pending direction. Refuse; user must resolve direction first.
• Validation failure on a single page. Skip that page, continue, log the failure under state.json.lastRun.failures[]. Do not abort the whole run.
• Asset copy failure. Continue the run; record the missing asset in the page's migrationDecisions[] with kind: "asset-missing". The migrated <img src> keeps the original absolute URL as a fallback.
• Output path collision. Two slugs mapping to the same output path. Refuse to write the second one and surface to the user — manual slug rename needed.
• Placeholder content in proposed/archetype file. Refuse to ship a page whose source contains [data-placeholder] elements. Surface the unsourced list and recommend sourcing real content (re-prototype, or edit the proposed file directly). There is no bypass flag — shipping placeholders to a public site is the failure mode this gate exists to prevent.
• Color reservation violated. Refuse the page; surface to user with the offending color and the reserved-for context.
• Brand-faithful inversion conflict. A hard rule declared inverted in extensions.divergence.brand_faithful_inversions[] is lifted from validation per T&M § Brand-faithful inversion handling. Emit a one-line note in the run summary acknowledging the lift.

What migrate does NOT do

• Critique or audit the migrated output. Run $impeccable critique stardust/migrated/ after migration if you want a quality assessment.
• Deploy. Stardust does not push, upload, or modify origin.
• Generate AEM EDS, a CMS payload, or framework components. The output is platform-agnostic static HTML; downstream conversion is a separate plugin's job.
• Re-fetch the live site. Offline after extract Phase 1.
• Run any iteration loop. Iteration belongs to prototype; migrate consumes the result.

References

• reference/migration-procedure.md — per-page render procedure, output path mapping, validation, provenance shape, idempotent skip, sidecar schema.
• reference/template-and-module-rendering.md — three render branches in detail, slot injection, deviation policy, validation contracts.
• reference/metadata-and-jsonld.md — head composition, JSON-LD per page-type, canonical strategy.
• reference/content-preservation.md — what's kept, transformed, dropped; internal-link rewriting; asset path rewriting; form handling.
• reference/asset-bundling.md — detection / copy / rewrite contract for the per-page asset-bundling phase.
• skills/stardust/reference/migrate-output-format.md — the self-contained-bundle contract downstream consumers can rely on (asset reference shape, directory layout, state.json.migrate block).
• skills/stardust/reference/token-contract.md — :root block refreshed from DESIGN.md on every render.
• skills/stardust/reference/data-attributes.md — structural attributes including data-template, data-module, data-slot, data-canon, data-deviation, data-bespoke, data-broken-link.
• skills/stardust/reference/state-machine.md — page lifecycle, page typing, stale-flagging cascade.
• skills/stardust/reference/artifact-map.md — provenance shape for migrated artifacts; canon files; sidecar shape.
• skills/prototype/reference/canon-extraction.md — how canon is built (input to migrate).
• skills/prepare-migration/SKILL.md — the cascade that produces every input migrate consumes.