[peppescg]

Closes #1854. Part of #2210 (the prototype is the UI source of truth).

Summary

Studio's memory surfaces now match the design prototype (stacklok/mecatl-prototypes, stack/08-tooling). Everything memory-related lives in apps/web/src/features/memory/.

Settings → Memory is now three cards, as in the prototype:

• Memory: a read-only On/Off report of the Project memory and Facts about you stores, read from the runtime capabilities. It replaces the old header and its Source/Owner line.
• Facts about you:
  • States: store off, nothing remembered, loading, load error.
  • "N facts remembered" (no byte size).
  • A sortable Name/Remembers table whose rows open the fact.
• Consolidate memory: the prototype's card, always shown when the agent reports a target.
  • The store picker uses the shadcn Select (feat(studio): add shadcn primitives from the prototype and upstream shadcn #2211); a target that can't generate is shown as "(unavailable)".
  • Confirms: "Consolidate memory?" and "Apply these changes?".
  • The plan preview ("Keeps … and merges in …" with current values), the outcome notices (still working / try again, no longer valid, view only) and the receipt.

The fact detail page (/workspace/memory?item=<key>, URL unchanged) is a port of the prototype's memory-fact-detail:

• the back pill, key title, value, and fact rows (Key, Status, Version, Writer, Origin, Source session, Updated);
• history, newest first;
• the states "History unavailable from this store/driver", "Memory not found" and "agent can't be reached".

BFF and contract

Consolidation now supports both targets the daemon offers, not only user_model:

• memoryConsolidationTargetSchema is user_model | project_memory. The generate request takes an optional { target } that defaults to user_model, so existing clients are unaffected.
• Consolidation capabilities are per target. Generate is gated on the chosen target. Decide is allowed when either target can decide; the daemon still enforces per-plan authority.
• Plans and receipts carry either target. Unknown targets are rejected (400).

Contracts were regenerated with task studio:generate. The new tests cover project_memory plans, the default target, per-target gating, and receipts for both targets (route, adapter and integration against mecated --mock).

Deviations from the prototype (intentional)

• Proposal row omitted on the fact detail. Studio's memoryRevisionSchema has no sourceProposalId, and this PR doesn't change the daemon contract.
• Studio URLs kept: the detail page stays at /workspace/memory?item=…, Source session links to /workspace/chat?sessionId=…, and the back links go to /workspace/settings/memory.
• Not-found handling: a 404 on the fact shows "Memory not found". A failed index read shows the unreachable message, not "not found".
• .text-page-title is now an @utility, so a page's own size override (the prototype's 44px key title) wins. Pages without an override are unchanged; the configured-skill detail title benefits too.

Other

• Test fix: consolidate-memory-card.test.tsx now fakes the BFF via apiClient.setConfig({ fetch }), as src/test-setup.ts prescribes, instead of vi.mock on the query module. The non-isolated vitest setup bypasses vi.mock.
• No user-docs change: no user-docs/ page describes Studio's memory UI.

Screenshots (before | after | prototype)

"Before" is origin/main. The BFF reads were stubbed in Playwright with fixtures shaped from apps/contracts, because the mock daemon has no memory facts. "Not on origin/main" marks states that only exist after this change.

Settings → Memory

Store picker open

Consolidate confirm

Plan preview

Apply confirm

Receipt

Facts about you off

Fact detail with history

History unavailable

Not found

Mobile

Every state in light and dark (including the empty plan and empty facts) is here.

Verification

Node 26.10.0, pnpm 12.4.2, on the branch rebased onto current main:

• task studio:lint, task studio:typecheck, task studio:generated-check and task studio:audit pass.
• task studio:test: web 724 tests, server 187.
• task studio:test:integration: 8 tests against mecated --mock.
• STUDIO_REQUIRE_MECATED=1 task studio:browser: 54 journeys.

No Go code changed.

🤖 Generated with Claude Code