fix(26): retire validate.ts/verify.cjs cooperating-sibling for W005/W006-archived/I001 via generator (stacks on #156) (#158)

* test(26): reproduce W005/W006-archived/I001 false positives in CJS validate path

Issue #26 (open-gsd/get-shit-done-redux): three validation drift items from
PR #3479 were hand-ported to verify.cjs via PR #3806 but never routed through
the generator pattern. This means they can drift again whenever validate.ts
changes.

RED tests assert that validate.generated.cjs exports four new items:
  - phaseDirNameRe (W005 regex — /^\d{2,}(?:\.\d+)*-[\w-]+$/)
  - MILESTONE_ARCHIVE_DIR_RE (W006-archived — /^v\d+.*-phases$/i)
  - PHASE_TOKEN_FROM_DIR_RE (W006-archived — phase dir token extractor)
  - canonicalPlanStem (I001 — plan/summary stem canonicalization)

Three of four new export tests are RED (exports missing from generated artifact).
Behavioral tests (W005 no-false-positive, W006-archived no-false-positive,
I001 no-false-positive) are GREEN because #3806's hand-ported fixes are present.

References: issue #26, ADR-3524, PR #154 (issue #4), PR #156 (issue #6),
PR #3479 (original fix), PR #3806 (hand-port).

* chore(26): extend gen-validate.mjs to export W005/W006-archived/I001 helpers

Issue #26 (open-gsd/get-shit-done-redux): extend gen-validate.mjs (introduced
in PR #156 / issue #6) to also extract the three drift items that PR #3806
hand-ported to verify.cjs but were never routed through the generator.

New helpers added to gen-validate.mjs:

  phaseDirNameRe (PHASE_DIR_NAME_RE) — W005 phase directory naming regex.
    /^\d{2,}(?:\.\d+)*-[\w-]+$/ accepts multi-digit prefixes (999.1-foo valid).
    Requires adding PHASE_DIR_NAME_RE as a named constant to validate.ts so
    it appears as an extractable identifier in the compiled output.

  PHASE_TOKEN_FROM_DIR_RE — W006-archived regex; extracts phase token from
    directory names like "64-auth-service" → "64". Used by
    forEachArchivedPhaseToken() and collectDiskPhases() in verify.cjs.

  MILESTONE_ARCHIVE_DIR_RE — W006-archived regex; matches milestone archive
    directory names like "v1.0-phases". Used by listMilestoneArchiveDirs().

  canonicalPlanStem() — I001 PLAN/SUMMARY stem canonicalization.
    '68-01-scaffolding' → '68-01'. Top-level named function in compiled output.

Extraction approach: PHASE_TOKEN_FROM_DIR_RE and MILESTONE_ARCHIVE_DIR_RE are
module-level const assignments, extracted via extractConstRegExp() (handles both
`const` and `export const` prefixes). PHASE_DIR_NAME_RE is the new named export
added to validate.ts in this commit. canonicalPlanStem is a top-level function,
extracted via extractTopLevelFunction() (brace-balanced).

validate.ts change: inline regex in Check 6 extracted to named constant
PHASE_DIR_NAME_RE (exported) and Check 6 updated to reference it.

References: issue #26, ADR-3524, PR #154 (issue #4), PR #156 (issue #6).

* chore(26): regenerate validate.generated.cjs with W005/W006-archived/I001 helpers

Re-run of sdk/scripts/gen-validate.mjs after extending it in the preceding
commit. The artifact now exports seven items (was three):

  New (issue #26):
    phaseDirNameRe       — /^\d{2,}(?:\.\d+)*-[\w-]+$/ (W005 check)
    PHASE_TOKEN_FROM_DIR_RE — phase token extractor regex (W006-archived)
    MILESTONE_ARCHIVE_DIR_RE — archive dir name matcher (W006-archived)
    canonicalPlanStem()  — PLAN/SUMMARY stem canonicalization (I001)

  Existing (issue #6):
    phaseVariants()
    buildRoadmapPhaseVariants()
    buildNotStartedPhaseVariants()

Freshness check: node sdk/scripts/check-validate-fresh.mjs → "fresh".

References: issue #26, ADR-3524, PR #154 (issue #4), PR #156 (issue #6).

* fix(26): migrate verify.cjs W005/W006-archived/I001 call sites to generated helpers

Issue #26 (open-gsd/get-shit-done-redux): three hand-maintained items in
verify.cjs now consumed from validate.generated.cjs (ADR-3524 §4 adapter pattern).

Changes:
  - Top-of-file require(): extend to also destructure phaseDirNameRe,
    PHASE_TOKEN_FROM_DIR_RE, MILESTONE_ARCHIVE_DIR_RE, canonicalPlanStem
    from validate.generated.cjs (issue #26 exports).

  - Remove inline PHASE_TOKEN_FROM_DIR_RE and MILESTONE_ARCHIVE_DIR_RE constants
    (lines ~403-404). Now sourced from generated artifact. listMilestoneArchiveDirs
    and forEachArchivedPhaseToken pick them up via the require() at top of file.

  - Check 6 (W005): replace inline regex /^\d{2,}(?:\.\d+)*-[\w-]+$/ with
    phaseDirNameRe from validate.generated.cjs. No behavior change.

  - Remove inline canonicalPlanStem() function (~8 lines). Now sourced from
    validate.generated.cjs. Check 7 (I001) continues to call it as before.

Public API of verify.cjs unchanged. Same migration shape as PR #156's Check 8.

References: issue #26, ADR-3524, PR #154 (issue #4), PR #156 (issue #6),
PR #3479 (original fix), PR #3806 (hand-port that #26 supersedes).

* docs(26): extend ADR-3524 2026-05-23 amendment with #26 scope

Extends the existing 2026-05-23 amendment (not a new dated section) to document
the W005/W006-archived/I001 generator migration introduced by issue #26.

Key points documented:
  - Four new exports added to validate.generated.cjs (phaseDirNameRe,
    PHASE_TOKEN_FROM_DIR_RE, MILESTONE_ARCHIVE_DIR_RE, canonicalPlanStem)
  - W006-archived coverage note: both fixes were already in verify.cjs from
    #3806; the gap was generator coverage of the regex constants
  - Extraction methods: extractConstRegExp() and extractTopLevelFunction()
  - Parity tests: tests/26-w005-w006-i001-cjs-drift-regression.test.cjs (7 tests)
  - Cross-reference: issue #26 completes the validate.ts ↔ verify.cjs migration
    scope started by issue #6

References: issue #26, ADR-3524, PR #154 (issue #4), PR #156 (issue #6),
PR #3479 (original fix), PR #3806 (hand-port).

* chore(26): add changeset fragment for W005/W006-archived/I001 generator migration

Touches get-shit-done/bin/lib/validate.generated.cjs and verify.cjs which
match USER_FACING_PREFIXES. Required by the fix-template checklist + the
changeset-lint CI workflow.

References: issue #26, ADR-3524, PR #154 (issue #4), PR #156 (issue #6).

.changeset/w005-w006-i001-generator-migration.md

@@ -0,0 +1,5 @@
+---
+type: Fixed
+pr: 26
+---
+W005/W006-archived/I001 drift items now covered by the validate.generated.cjs generator (gen-validate.mjs + validate.ts). PR #3806 hand-ported the behavioral fixes; issue #26 routes them through the generator so they cannot drift again. Per ADR-3524 generator framework introduced by PR #154, extended by PR #156.