chore: add agent column to TASKS.md schema

docs/TASKS.md

@@ -1,9 +1,13 @@
 # Tasks — MVP
 
 > Single-writer: orchestrator only. Workers read but never modify.
+>
+> **`agent` column values:** `codex` | `sonnet` | `haiku` | `glm-5` | `opus` | `—` (auto/default)
+> Pipeline crons pick the cheapest capable model. Override with a specific value when a task genuinely needs it.
+> Examples: `opus` for major architecture decisions, `codex` for pure coding, `haiku` for review/verify gates, `glm-5` for cost-sensitive coding.
 
-| id     | status      | milestone | description                                                                                        | pr   | notes         |
-| ------ | ----------- | --------- | -------------------------------------------------------------------------------------------------- | ---- | ------------- |
+| id     | status      | agent   | milestone                                                                                          | description                                                  | pr            | notes |
+| ------ | ----------- | ------- | -------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ | ------------- | ----- |
 | P0-001 | done        | Phase 0 | Scaffold monorepo                                                                                  | #60                                                          | #1            |
 | P0-002 | done        | Phase 0 | @mosaic/types — migrate and extend shared types                                                    | #65                                                          | #2            |
 | P0-003 | done        | Phase 0 | @mosaic/db — Drizzle schema and PG connection                                                      | #67                                                          | #3            |
@@ -89,8 +93,8 @@
 | P8-017 | done        | Phase 8 | TUI Phase 8 — autocomplete sidebar, fuzzy match, arg hints, up-arrow history                       | #184                                                         | #170          |
 | P8-018 | done        | Phase 8 | Spin-off plan stubs — Gatekeeper, Task Queue Unification, Chroot Sandboxing                        | —                                                            | #171          |
 | P8-019 | done        | Phase 8 | Verify Platform Architecture — integration + E2E verification                                      | #185                                                         | #172          |
-| P8-001 | not-started | Phase 8   | Additional SSO providers — WorkOS + Keycloak                                                       | —    | #53           |
-| P8-002 | not-started | Phase 8   | Additional LLM providers — Codex, Z.ai, LM Studio, llama.cpp                                       | —    | #54           |
-| P8-003 | not-started | Phase 8   | Performance optimization                                                                           | —    | #56           |
-| P8-004 | not-started | Phase 8   | Beta release gate — v0.1.0 tag                                                                     | —    | #59           |
+| P8-001 | not-started | codex   | Phase 8                                                                                            | Additional SSO providers — WorkOS + Keycloak                 | —             | #53   |
+| P8-002 | not-started | codex   | Phase 8                                                                                            | Additional LLM providers — Codex, Z.ai, LM Studio, llama.cpp | —             | #54   |
+| P8-003 | not-started | codex   | Phase 8                                                                                            | Performance optimization                                     | —             | #56   |
+| P8-004 | not-started | haiku   | Phase 8                                                                                            | Beta release gate — v0.1.0 tag                               | —             | #59   |
 | FIX-01 | done        | Backlog | Call piSession.dispose() in AgentService.destroySession                                            | #78                                                          | #62           |