0.21.0

• Track ESS 0.55.0 (from 0.53.0). New specifications start on ess/23, and ess:specifying
  reads the newest format from ess specify formats instead of validating a header one past it
  (beyond10x/ess#460). later-formats.md covers ess/23: an updates: that re-keys a record,
  {subject: state}, bulk deletes: instances:, enum variant attributes, per-element
  affects: each: and row-set selectors, each with the targets that still refuse it; the new
  shelves.yaml example is validated, synthesized and interpreted by agentplugins-check tools.
  The skills explain ess generate --check, validation completeness, the ESS-ENTITY-019,
  ESS-COMMAND-019, ESS-SPEC-012 and ESS-SPEC-017 diagnostics, the type_mismatch refusal
  of a membership operand naming an input, the generate_optional_<t> port method, suite formats
  ess-conformance/44 and /45, ESS-SYNTH-003/004, and mutation report /4. The Rust
  tutorial, the governed-plan tutorial and their trial fixtures require ESS 0.55.0 and its crates.
  ess:testing-conformance no longer calls ErrUnsupported a skip: the runner records
  unsupported, which is not a pass, except for entity setup and clock readings.
• verified.json tracks ESS 0.55.0, Worktree 0.10.0 and Connectors v0.31.0 after
  agentplugins-check tools and the ess-full-package, ess-tutorial and worktree-onboarding
  trials; their baselines are the runs of 2026-10-07.
• Track Worktree 0.10.0. worktree:managing-worktrees and the Worktree plugin page describe
  worktree sweep --all-profiles, the daily timer that discards the build cache of idle trees and
  archives expired or finished ones without removing any. worktree:init no longer suggests the
  downloaded profile may be committed into a repository, names the headless workspace root as the
  repository's parent directory, and states plainly that a worktree --version answer means the
  CLI is installed: the worktree-onboarding trial quoted all three as confusing. The gc step
  says what an id-less run assesses in one sentence.
• Track Connectors v0.31.0 (from v0.28.0). connectors:integrating follows a refusal's
  next_action, including the new revalidate_connection for expired evidence with an intact
  credential, quotes service_reason, reports retry_after_seconds and leaves a 429 write
  unknown, and lists operations by datasource family. Its setup reference covers
  oauth2_client_credentials profiles, revalidation after an adapter configuration change
  (create_connection when identity changed), insufficient_scope, and handing one connection to
  an operator-pinned consumer with connections launch. connectors:upgrade explains the single
  metadata_unavailable answer after upgrading to v0.31.0.
• The design and parallel-safety plan critics trace every acceptance line's reads to the item in
  the set that produces them, and raise a finding when no depends_on edge orders the reader
  after its producer. A panel had approved a set where one story read a store its sibling created.
• The live eval installs ESS 0.55.0, Worktree 0.10.0 and Connectors v0.31.0.