feat(#1688): warn on stale model bake for static-frontmatter runtimes (#1692)

* docs(#1650): fix stale opencode install-path claim in core settings

* feat(#1688): warn on stale model bake for static-frontmatter runtimes

* chore(#1688): backfill changeset pr field with real PR number

* test(#1688): make resolveAgentDir assertions use path.join for windows

* docs(#1688): codify windows path-literal-in-assert anti-pattern + align test

docs/CONFIGURATION.md

@@ -145,7 +145,7 @@ GSD stores project settings in `.planning/config.json`. Created during `/gsd-new
 | `mode` | enum | `interactive`, `yolo` | `interactive` | `yolo` auto-approves decisions; `interactive` confirms at each step |
 | `granularity` | enum | `coarse`, `standard`, `fine` | `standard` | Controls phase count: `coarse` (2-4), `standard` (4-6), `fine` (6-10) |
 | `model_profile` | enum | `quality`, `balanced`, `budget`, `adaptive`, `inherit` | `balanced` | Model tier for each agent (see [Model Profiles](#model-profiles)). `adaptive` was added per [#1713](https://github.com/open-gsd/gsd-core/issues/1713) / [#1806](https://github.com/open-gsd/gsd-core/issues/1806) and resolves the same way as the other tiers under runtime-aware profiles. |
-| `runtime` | string | `claude`, `codex`, or any string | (none) | Active runtime for [runtime-aware profile resolution](#runtime-aware-profiles-2517). When set, profile tiers (opus/sonnet/haiku) resolve to runtime-native model IDs. Today only the Codex install path emits per-agent model IDs from this resolver; other runtimes (`opencode`, `gemini`, `qwen`, `copilot`, …) consume the resolver at spawn time and gain dedicated install-path support in [#2612](https://github.com/open-gsd/gsd-core/issues/2612). When unset (default), behavior is unchanged from prior versions. Added in v1.39 |
+| `runtime` | string | `claude`, `codex`, or any string | (none) | Active runtime for [runtime-aware profile resolution](#runtime-aware-profiles-2517). When set, profile tiers (opus/sonnet/haiku) resolve to runtime-native model IDs. The resolved ID is embedded into each agent's static frontmatter at install time on `codex` and `opencode` (whose `task` / `spawn_agent` interfaces do not accept an inline `model` parameter, so editing `model_overrides` requires re-running `gsd install <runtime>` to take effect — see [Per-Agent Overrides](#per-agent-overrides)); other runtimes consume the resolver at spawn time. When unset (default), behavior is unchanged from prior versions. Added in v1.39 |
 | `model_profile_overrides.<runtime>.<tier>` | string \| object | per-runtime tier override | (none) | Override the runtime-aware tier mapping for a specific `(runtime, tier)`. Tier is one of `opus`, `sonnet`, `haiku`. Value is either a model ID string (e.g. `"gpt-5-pro"`) or `{ model, reasoning_effort }`. See [Runtime-Aware Profiles](#runtime-aware-profiles-2517). Added in v1.39 |
 | `model_policy.provider` | string | `openai`, `anthropic`, `anthropic-fable`, `google`, `qwen`, `generic` | (none) | Declares the model provider. Known providers (`openai`, `anthropic`, `anthropic-fable`, `google`, `qwen`) unlock catalog-backed presets. `generic` treats all model IDs as opaque strings — no prefix inference, no reasoning-effort defaults. `model_policy.runtime_tiers` resolves before legacy `model_profile_overrides`. See [Model Policy Presets](#model-policy-presets-model_policy--added-in-v142). Added in v1.42 ([#49](https://github.com/open-gsd/gsd-core/issues/49)) |
 | `model_policy.budget` | enum | `high`, `medium`, `low` | (none) | Selects a budget tier when using a known provider. GSD materializes the matching catalog preset into explicit tier mappings at resolve time. Ignored when `provider` is `generic` or `custom`. Added in v1.42 ([#49](https://github.com/open-gsd/gsd-core/issues/49)) |

docs/INVENTORY-MANIFEST.json

@@ -386,6 +386,7 @@
       "security.cjs",
       "semver-compare.cjs",
       "shell-command-projection.cjs",
+      "stale-bake-guard.cjs",
       "state-command-router.cjs",
       "state-document.cjs",
       "state.cjs",

docs/how-to/configure-model-profiles.md

@@ -61,6 +61,8 @@ Valid values: `opus`, `sonnet`, `haiku`, `inherit`, or any fully-qualified model
 npx @opengsd/gsd-core@latest --codex --global   # or --opencode, --kilo, etc.
 ```
 
+GSD will also warn you if you forget: workflow entry commands (`gsd init plan-phase`, `gsd init execute-phase`, etc.) detect when `.planning/config.json` or `~/.gsd/defaults.json` is newer than your installed agent files and print a one-line stderr reminder naming the changed file and the re-install command. The check is read-only and runs only on `codex` and `opencode`; Claude Code resolves models at spawn time and is unaffected. (#1688)
+
 ---
 
 ## Per-phase-type models (`models`)