v0.4.0

The hosted Cloudflare Worker grows from 6 to 17 of the 19 tools. Every
newly-hosted tool shares its logic with the stdio server through a
dependency-free src/spec/* (or src/index/*) module, so the two
transports answer identically and can't drift.

Added

• Eleven more tools on the hosted Worker, each reading the
  parsed-spec JSON or index it already loads from R2:

  • spec.grammar, spec.tables, spec.sdo_index — grammar
    productions from <emu-grammar>, <emu-table> content, and the
    Syntax-Directed-Operation-by-production index.
  • clause.outline, spec.global_search — the section tree, and one
    search across both ECMA-262 and ECMA-402.
  • spec.snapshots — the live (spec, edition, sha, fetched_at)
    snapshots the Worker serves from R2.
  • spec.symbol_resolve, spec.well_known_intrinsics — resolve
    notation ([[Slot]], %Intrinsic%, ~enum~) and enumerate
    well-known intrinsics with their defining clauses.
  • spec.diff — clause-level diff across two editions of a spec.
  • spec.crossrefs — incoming / outgoing references, with the
    AOID-densified reverse index and the opt-in 262 ↔ 402 cross-spec
    pass.
  • test262.search — ranked search over the tc39/test262 index,
    served from the same R2 side-index spec.about already reads.

  The two tools that stay stdio-only are spec.history (shells out to
  git log against a vendored checkout) and test262.get (reads each
  test's full source from the vendored test262 corpus, which isn't in
  R2).

Changed

• Every ported tool's logic now lives in a shared, dependency-free
  src/spec/* (or src/index/*) module imported by both the stdio
  server and the bundled Worker, replacing what would otherwise be a
  hand-maintained second copy. The stdio tool surface — every schema and
  result shape — is unchanged; this extends the 0.3.1 consolidation
  across every newly-hosted tool.
• The hosted-vs-stdio tool split is a single source of truth. Both
  transports' server instructions and the Worker's tools/list
  registry derive their tool lists and counts from one tool_inventory
  module, so a tool crossing over updates every surface at once.
• spec.about's metadata scan no longer evicts the Worker's hot
  parsed-spec cache. The introspection scan that reads every snapshot
  for its pin now uses a parse-and-discard path instead of thrashing
  the capacity-4 LRU that clause.get / spec.search depend on.
• The docs now mark transport availability. The tool reference
  carries a per-tool Availability line (hosted Worker vs
  stdio-only), generated from the same tool_inventory source of
  truth, and getting-started splits into self-contained Local (stdio)
  and Hosted (HTTP) walkthroughs.