Merge branch 'next' into feat/1820-specless-predicate-rail

.changeset/1143-claude-orchestration-capability.md

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+---
+type: Added
+pr: 2044
+---
+**A default-off, BETA, claude-only "Claude orchestration" capability** — adopts Claude Code's Workflow tool (`/effort ultracode`, Agent SDK ≥ v0.3.149) as an optional parallel-execution backend for the GSD loop, restoring the wave parallelism + plan-checker + verifier that the #853 backgrounded-agent nesting limitation forces inline on Claude Code, and folding the existing `gsd-ultraplan-phase` plan-offload under the same runtime gate. When `claude_orchestration.enabled` is on AND the runtime is Claude AND the Workflow tool is detected AND the Agent SDK meets the floor (`claude_orchestration.min_agent_sdk_version`, default `0.3.149`), `execute-phase` emits a generated Workflow script (`waves → parallel() barriers`, `plans → agent({ agentType: 'gsd-executor', isolation: 'worktree' })`, `files_modified overlap → separate sequential stages`, `resumeFromRunId` wired to the phase run id, shared `budget` pool) that composes the SAME executor agent + worktree isolation the inline path uses, so artifacts/commits are produced identically. Detection is pure and fail-closed (any miss → inline), so on any runtime lacking the Workflow tool behaviour is byte-identical to today. Adds a pure module `gsd-core/bin/lib/claude-orchestration.cjs` (`detectWorkflowBackend`, `emitWorkflowScript`), the `capabilities/claude-orchestration/` declaration with two gated loop contributions (`execute:wave:post`, `plan:post`) and a `claude-orchestration` command family (`gsd-tools claude-orchestration detect-backend|emit-workflow`), federated config keys, and an ADR-1143 implementation amendment. (#1143)

.changeset/eager-tunas-swim.md

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+---
+type: Fixed
+pr: 1991
+---
+**`/gsd-quick` no longer halts with a stale-base worktree mismatch** — the worktree executor now degrades to sequential execution when its fork base has diverged from origin/HEAD, instead of spawning a worktree guaranteed to fail the base-mismatch guard.

.changeset/gentle-badgers-roar.md

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+---
+type: Fixed
+pr: 2048
+---
+**`model_overrides` Claude model IDs now resolve to Agent-tool aliases on the claude runtime** — a full Claude model ID (e.g. `claude-sonnet-5`) in `model_overrides` was returned verbatim and silently dropped by the Claude Agent tool (whose `model` parameter documents only tier aliases), causing the spawned subagent to inherit the parent session model instead of the configured one. It now maps to the tier alias (`sonnet`/`opus`/`haiku`/`fable`), consistent with the `model_policy` path (#1144). Bare aliases, non-Claude values, and non-Claude runtimes are unchanged; a Claude ID with no alias warns once and falls through to tier resolution. (#2041)

.changeset/noble-foxes-purr.md

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+---
+type: Fixed
+pr: 2051
+---
+**`capability state` and `loop render-hooks` now accept `--runtime` to override the auto-detected runtime** — previously both commands parsed only `--config-dir`, so the runtime config dir was derived from the persisted `.planning/config.json` runtime (precedence `GSD_RUNTIME` → `config.runtime` → `claude`). A repo that persisted `runtime:"codex"` resolved the config dir to `~/.codex`, where the Claude skill isn't installed, so every skill-bearing capability reported `surfaced:false` and `execute:post`/`verify:post` hooks silently no-op'd when the operator drove GSD from Claude Code. `--runtime <r>` (canonicalized, so aliases like `codex-app` work) now bypasses that fallback so the config dir resolves to the explicitly-named runtime's home. Behavior without the flag is unchanged. (#2003)

.changeset/steady-ibex-run.md

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+---
+type: Fixed
+pr: 2049
+---
+**Skill-bearing capabilities now surface correctly on flat command-layout installs** — on an install using the flat `commands/gsd-<stem>.md` source layout (e.g. a Claude Code local project install with no `commands/gsd/` subdir), every skill-bearing capability (`nyquist`, `code-review`, `security`, `ui`, `mempalace`, `ai-integration`, `profile-pipeline`) was silently reported `surfaced:false`/`enabled:false`/`active:false`, so their loop hooks (`verify:post`, `execute:post`, etc.) never fired even with the corresponding `workflow.*` toggle on. The skill-manifest resolver now detects the flat layout and produces the same stems the nested `commands/gsd/*.md` loader does. (#1858)

.changeset/steady-mice-frolic.md

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+---
+type: Added
+pr: 1994
+---
+**`/gsd:onboard` guides brownfield setup** — existing repos now have a top-level onboarding command that routes through codebase mapping, docs ingest, project initialization, and an onboarding summary without silently overwriting planning files.