chore(main): release 7.184.0

[github-actions]

Stable architect prompt-cache prefixes (#2759)

What

• Moved session-bound architect enhancer guidance and the conditional /swarm
  command rule to a trailing, host-renderable user-role carrier.
• Preserved the byte-identical conversation prefix across architect turns while
  retaining the existing strict Qwen/Gemma system-rendering boundary.
• Added compaction-aware one-shot suppression so live-turn guidance is not copied
  into compaction summaries.

Why

Per-step architect guidance was changing the host's cache-sensitive system tail,
which prevented prompt-cache reuse even when the conversation history was
unchanged. The new request-boundary staging follows OpenCode's actual
messages.transform-before-system.transform order and keeps dynamic guidance
renderable without polluting the stable prefix.

How to use

No configuration or workflow changes are required.

Migration notes

None required.

---

Governed v8 defaults-flip frame: conservative preset, migration, rollback, and inventory (#2504)

What

Ships the governance frame required by issue #2504 (Workstream F PR 12 of 21,
consolidating EPIC #1677) around the already-armed v8 defaults flips. No new
default flip is introduced and no version number changes.

• preset config key ("default" | "conservative", optional): the
  conservative preset restores the pre-flip (v7) defaults for every flipped
  surface — auto_review.enabled: false and serial new plans — applied as the
  lowest-precedence layer in config resolution so explicit user values always
  win (including partial sections like auto_review: { mode: "gate" }).
• Migration + warnings: /swarm config doctor now surfaces governed
  default changes as defaults-flip info findings (naming the change, the
  kill switch, and the preset) while config_format_version < 3, with a
  "Defaults changes (v8)" report section. /swarm config doctor --fix
  acknowledges the changes by stamping config_format_version: 3 —
  idempotently; passive runs never write. This also fixes the long-standing
  gap where applied migrations re-advertised forever because the version was
  never written back.
• Preset-aware new plans: save_plan consults the resolved preset — under
  conservative, new plans default to serial (parallelization_enabled: false); without it the v8 parallel-first default (v7.132.0, [EPIC] v8 flagship: parallel-first execution — default-on worktree-isolated parallel coders for provably disjoint work #1674)
  applies. Explicit profile keys always win; config-load failures fail open
  to the v8 default.
• Inventory + trust-posture docs: new docs/defaults-governance.md
  inventories every governed default change with production-evidence
  citations ([Workstream H] PR 08 of 15: Prove default-path PR-review completion with findings, recovery and restoration #2585 live host proof, [Workstream H] PR 09 of 15: Qualify PR-review completion across supported runtimes, hosts and enabled features #2586 partial supported-host evidence,
  [Workstream E] PR 03 of 09: Prove hybrid retrieval and graph-memory quality across languages and hosts #2490/[Workstream E] PR 04 of 09: Enforce review routing and synthesize high-confidence findings #2491/[Workstream F] PR 11 of 21: Ship the governed HarnessOpt capstone with held-out validation #2503 quality decisions, the pinned auto-review cost baseline),
  per-flip kill switches and rollback, the three K3 UX dispositions (UX-3
  auto_select_architect stays install-layer; UX-6 startup banner deferred —
  no exit evidence; UX-7 free-tier model resolution already ships via
  live-catalog preflight), and the non-goals (experimental resilience,
  autonomy, remote export, training capture, sandbox — not flipped).
  Stale overgeneralized "all default false" claims in architecture.md,
  installation.md, and design-rationale.md are amended to describe the
  actual posture, and installation.md gains a Compatibility Matrix.

Why

The auto_review v8 flip is armed in code (approved burn-in pin + major≥8
gate) and the parallel-first new-plan default landed in v7.132.0 — but there
was no preset escape hatch, no migration/warning surface for upgrading
configs, no evidence-cited inventory, and the documented trust posture still
claimed universal opt-in defaults. #2504 requires exactly this frame:
evidence-gated flips only, migration and rollback documented and tested.

Migration steps

• Nothing is required — existing configs keep their exact behavior on 7.x.
• To restore all pre-flip (v7) defaults: set "preset": "conservative".
• Per-flip kill switches: auto_review.enabled: false (config) and
  execution_profile.parallelization_enabled: false (per plan). Explicit
  values always win over any flipped default or the preset.
• /swarm config doctor lists pending default changes; --fix acknowledges
  them (stamps config_format_version: 3).

Caveats

• The auto_review default change itself activates mechanically on the first
  8.x release (release-please owns versions); this change ships the
  governance around it, not a new flip.
• Supported-host qualification ([Workstream H] PR 09 of 15: Qualify PR-review completion across supported runtimes, hosts and enabled features #2586) is still open; its published evidence
  is Windows-only for the R10 cells and is not advertised as cross-platform
  qualification anywhere in this change.

Tests

• tests/unit/config/conservative-preset.test.ts — schema/loader/release-seam
  preset contract, explicit-override precedence (both directions), partial
  sections, save_plan new-plan defaults, load-failure fail-open.
• tests/unit/config/defaults-flip-upgrade.test.ts — v7-era configs get
  defaults-flip findings; --fix stamps config_format_version: 3
  idempotently; passive runs never write; version-3 configs stop advertising;
  legacy rename migrations unchanged.
• tests/unit/config/defaults-flip-rollback.test.ts — per-flip kill switches
  verified at a simulated v8 release; inventory doc names both kill switches.
• tests/unit/config/parallelization-default.test.ts — hardened with XDG
  isolation (save_plan now reads config for the preset).

🤖 I have created a release beep boop

7.184.0 (2026-09-16)

Features

• config: governed v8 defaults-flip frame — conservative preset, migration, rollback, inventory (#2504) (ae07d84)

Bug Fixes

• config: review-round hardening for the #2504 governance frame (ea1c3a8)
• prompt-cache: stabilize architect request prefixes (7da47f9)
• prompt-cache: stabilize architect request prefixes (54412be)

---

This PR was generated with Release Please. See documentation.

[github-actions]

Drift check report

Found 2 drift finding(s): 0 error, 0 warning, 2 notice.

required-check-contract (2)

• 🔵 notice scripts/required-check-contract.json: [RULESET_DIVERGENCE] intended-required context "drift" is not yet required by the captured ruleset
• 🔵 notice scripts/required-check-contract.json: [RULESET_DIVERGENCE] intended-required context "drift" is not present for every expected event in captured external workflow evidence

[github-actions]

🤖 Created releases:

• v7.184.0

🌻