feat(#49): provider-neutral model policy presets

* feat(#49): provider-neutral model policy presets

Adds model_policy config surface with known-provider presets (openai/anthropic/google/qwen) and generic provider escape hatch. model_policy.runtime_tiers resolves before legacy model_profile_overrides. reasoning_effort is stripped for unsupported runtimes.

Closes #49

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(#49): replace unregistered /gsd-settings-advanced token in docs

docs-parity-live-registry enforces every /token in docs/*.md maps to
a live command. /gsd-settings-advanced is a workflow filename, not a
registered command — use /gsd:settings instead.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(#49): update INVENTORY.md count and manifest for config-types.cjs

inventory-counts and inventory-manifest-sync tests require the headline
count and INVENTORY-MANIFEST.json to reflect every file in bin/lib/.
config-types.cjs (new module added by feat(#49)) was missing from both.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

src/config-types.cts

@@ -0,0 +1,62 @@
+/**
+ * TypeScript type definitions for GSD project config — model_policy block.
+ *
+ * These types reflect the model_policy config shape consumed by
+ * resolveModelPolicy in core.cjs and validated by config-schema.cjs.
+ *
+ * See feat #49 (model_policy presets) and config-schema.manifest.json.
+ * Added under ADR-457: TS sources in src/ compile to CJS artifacts in
+ * get-shit-done/bin/lib/ at publish time.
+ *
+ * Resolution precedence (highest → lowest):
+ *   1. model_overrides[agent]
+ *   2. model_policy.runtime_tiers[runtime][tier]   (Sub-path A)
+ *   3. model_policy provider preset + budget        (Sub-path B)
+ *   4. model_profile_overrides
+ *   5. resolve_model_ids / profile fallback
+ */
+
+/**
+ * A single tier entry mapping a GSD tier (opus | sonnet | haiku) to a
+ * concrete model ID. The optional `reasoning_effort` field is forwarded to
+ * runtimes that accept it (e.g. opencode).
+ */
+export interface TierEntry {
+  model: string;
+  reasoning_effort?: string;
+}
+
+/**
+ * The three standard GSD tiers for one runtime target. All fields are
+ * optional so callers can supply a partial override (e.g. only `opus`).
+ */
+export interface RuntimeTiers {
+  low?: TierEntry;
+  medium?: TierEntry;
+  high?: TierEntry;
+}
+
+/**
+ * Top-level `model_policy` block in `.planning/config.json`.
+ *
+ * - `provider`       — known provider slug (e.g. `"anthropic"`, `"openai"`).
+ *                      Drives Sub-path B catalog lookup.
+ * - `budget`         — optional spend/quality tier that pairs with `provider`
+ *                      to select a preset from the model catalog.
+ * - `runtime_tiers`  — explicit per-runtime, per-tier model overrides
+ *                      (Sub-path A). Keys are runtime slugs (e.g. `"opencode"`,
+ *                      `"copilot"`); values are `RuntimeTiers` maps.
+ */
+export interface ModelPolicyConfig {
+  provider: string;
+  budget?: string;
+  runtime_tiers?: Record<string, RuntimeTiers>;
+}
+
+/**
+ * Minimal subset of the GSD project config that includes `model_policy`.
+ * Extend this interface when migrating further config keys to TypeScript.
+ */
+export interface ProjectConfig {
+  model_policy?: ModelPolicyConfig;
+}