v1.15.0

Roadmap Tranche 6 resolved (2026-07-12): Gate G2 closed with residual area failures = 0/8
on the calibrated baseline (docs/research/2026-07-g2-verdict.md) — the T6 area-syntax sugar
is parked behind frozen reversal triggers, and only the tranche's unconditional Track B
items ship below.

Added

• matchVocabulary — one shared closed-vocabulary matcher, and the advisory W_ALIAS_MATCH.
  The token-bounded matcher core (normalizeLabel/synonymMatchesLabel) moved from
  src/intent-concepts.ts into new src/vocabulary.ts, and the scattered room-label regexes in
  analyze.ts/analyze/circulation.ts are re-expressed as its data-driven USE_VOCABULARY
  (canonical vs alias words per use kind). One matcher core, two vocabularies at two layers — the
  brief-level CONCEPTS table and SYNONYMS_VERSION are untouched (judge fixture byte-green; no
  second concept table). New advisory W_ALIAS_MATCH fires when a room with no authored
  uses classifies only via an indirect alias ("Powder" → WC, "Foyer" → entry), carrying a
  machine-applicable fix that inserts the explicit uses …; corpus classification is pinned
  byte-identical by test/vocabulary-equivalence.test.ts over every example and eval golden.
• rankFixes — deterministic cost ordering for a diagnostic's fix alternatives (exported).
  Orders the mutually-exclusive fixes on one diagnostic by applicability rank → total edit
  magnitude (smallest change wins) → earliest offset → stable index. arch fix now applies only
  the top-ranked alternative per diagnostic; LSP code actions present alternatives in the same
  canonical order. Identity on today's singleton arrays, so existing behavior is byte-identical.
• describe().freedom — a degrees-of-freedom placement report (append-only). Per placed
  element, whether its position was authored absolutely or derived by the resolver — rooms
  absolute/relational/strip, openings attached/absolute, furniture
  anchored/against-wall/absolute — as per-family counts plus one elements row each.
  Facts only (ADR 0005); the internal marker never reaches the Scene, so rendered output is
  unchanged.
• Optional metric unit suffixes on numeric literals (roadmap Tranche 6 Track B). A number may
  carry a mm/cm/m suffix, folded to millimetres at lex time: 3m → 3000, 3.5m → 3500,
  3cm → 30, 3mm → 3 (an explicit no-op). Bare numbers still mean millimetres, so every
  existing plan's output is byte-identical (a determinism/byte-equality test compiles a suffixed
  plan and its bare-mm twin and asserts equal SVG). The conversion is exact — decimal-point
  shifting on the digit string, never a floating-point multiply — so 3.333m is exactly 3333 and
  0.0005m is exactly 0.5 mm. The suffix must sit immediately after the digits (no space) and
  does not fire when a letter follows (3meters = number 3 + ident meters); each component of a
  WxH literal may carry its own suffix (3mx4m, 3.5mx4200). Deliberately no area unit
  (m²) — that belongs to the parked T6 area syntax (Gate G2 closed; see
  docs/research/2026-07-g2-verdict.md). The formatter normalises a suffixed literal to its mm
  value (3.5m → 3500). Folded in the lexer (src/lexer.ts); the grammar source of truth
  (src/grammar/tokens.ts) and every generated artifact — editor grammars, grammars/archlang.gbnf,
  spec.llm.md, llms-full.txt — carry the optional suffix.
• Note (eval baseline): spec.llm.md is the eval's author prompt, and this change adds a line
  to it, so it now differs from the prompt behind the 2026-07-11/12 calibrated live baseline. No
  scoring/judge/fixture code changed; re-running the paid live baseline under the new prompt stays a
  separate, owner-approved action (default: not run).

Changed

• arch fix now collects fixes from lint diagnostics too (previously compile-stage
  diagnostics only). W_ALIAS_MATCH is the first lint rule to carry a fix; the L1 gate's
  l1Pipeline remains the compile-stage-fix + repair reference pipeline and is unaffected.
• A room labelled with a WC-only alias (e.g. "Powder") now classifies as a WC. The word was
  dead in the old regex cascade (WC_RE was only consulted after WET_RE, which never matched
  it); the vocabulary form resolves it, flagged by W_ALIAS_MATCH. The one deliberate
  reclassification — every other label classifies exactly as before (pinned by test).