[persona-kit 5/8] Shrink @agentworkforce/workload-router (drop persona types, major bump)

[willwashburn]

Part of the persona-kit consolidation. Depends on #67. This is issue 5 of 8.

Goal

Now that workforce CLI consumes everything persona-shaped from @agentworkforce/persona-kit (#67), @agentworkforce/workload-router no longer needs to re-export those symbols. Delete the moved-out exports outright. Major-version bump for the breaking change.

After this PR, workload-router is only:

• Routing profiles (RoutingProfile, RoutingProfileRule)
• Persona catalog (personaCatalog, the auto-generated registry from packages/workload-router/src/generated/personas.ts)
• PersonaSelection (the routing-resolution result type)
• Evidence + owner-decision logic
• Anything else that's about picking a persona for a workload, not about instantiating one.

What gets deleted from packages/workload-router/src/index.ts

Everything that was re-exported via persona-kit shim in #65. Concretely:

• Constants: HARNESS_VALUES, PERSONA_TIERS, PERSONA_TAGS, SIDECAR_MD_MODES, PERMISSION_MODES, CODEX_SANDBOX_MODES, CODEX_APPROVAL_POLICIES, SKILL_SOURCE_KINDS, HARNESS_SKILL_TARGETS.
• Types: Harness, PersonaTier, PersonaTag, HarnessSettings, PersonaRuntime, PersonaSkill, PersonaInputSpec, PersonaPermissions, PersonaMount, McpServerSpec, PersonaSpec, HarnessSkillTarget, SkillMaterializationOptions, SkillInstall, SkillMaterializationPlan, PersonaInstallContext, PersonaContext, SidecarMdMode, CodexSandboxMode, CodexApprovalPolicy, PermissionMode.
• Functions: materializeSkills, materializeSkillsFor, parseSkills, parsePersonaSpec, buildInstallArtifacts, resolveSkillSource.
• Constants/types that the persona schema references: PERSONA_INTENTS, BUILT_IN_PERSONA_INTENTS — these are persona-domain.

What stays

• RoutingProfile, RoutingProfileRule types.
• PersonaSelection type — but its .skills, .runtime, etc. fields now refer to types imported from persona-kit.
• personaCatalog and the build script scripts/generate-personas.mjs.
• The usePersona(intent, profile) resolver function.
• Evidence, owner-decision, workload-routing types and functions.
• Tests for the above (the persona-domain tests moved to persona-kit in [persona-kit 2/8] Move harness-kit + workload-router persona code into persona-kit (no behavior change) #65).

Tasks

• Delete the moved-out exports from packages/workload-router/src/index.ts. The file should shrink by hundreds of lines.
• Update remaining workload-router code to import the persona types it still needs from @agentworkforce/persona-kit (e.g., PersonaSelection.skills: PersonaSkill[] — PersonaSkill now comes from persona-kit).
• Add @agentworkforce/persona-kit as a regular dep on packages/workload-router/package.json.
• Bump packages/workload-router/package.json version to the next major (0.18.0 → 1.0.0, or follow the local convention if there's a 0.x rule).
• Update packages/workload-router/src/index.test.ts — remove tests that covered the moved-out functions (those moved to persona-kit in [persona-kit 2/8] Move harness-kit + workload-router persona code into persona-kit (no behavior change) #65). Keep tests for routing/catalog/evidence.
• Update the CLI's imports if any still pull persona-domain symbols from workload-router (they shouldn't after [persona-kit 4/8] Migrate workforce CLI to use @agentworkforce/persona-kit #67, but double-check with grep).
• Update packages/persona-kit/: persona-kit no longer needs to re-export the moved symbols 'as if from workload-router' — kill any compatibility shims added in [persona-kit 2/8] Move harness-kit + workload-router persona code into persona-kit (no behavior change) #65.

Constraints

• This is a breaking change for any external consumer of @agentworkforce/workload-router that imports persona-domain symbols. Per user direction, no back-compat shim. Major version bump signals it.
• relay's SDK still pins @agentworkforce/workload-router@^0.11.0 at this point — that's fine because relay's migration is a separate issue (relay-side). Don't break that pin from this side; relay will catch up by depending on persona-kit directly.
• Don't touch packages/workload-router/src/generated/personas.ts or its build script; the catalog stays.

Verification

• pnpm -r build succeeds.
• pnpm -r test passes.
• agentworkforce <persona> smoke test (claude/codex/opencode harnesses) — same behavior as before.
• grep -r '@agentworkforce/workload-router' packages/cli packages/persona-kit packages/harness-kit packages/agentworkforce — only routing/catalog imports remain; no materializeSkills, PersonaSpec, PersonaSkill, Harness from workload-router anywhere in the monorepo.
• npm pack --dry-run on workload-router shows the smaller surface area; no leftover persona files.

Reference

Plan section 1.5.