fix(agents): project strict query summaries

[HomenShum]

Summary

• Project agentPlanning and agentMemory database documents onto their strict public Convex return contracts, stripping _creationTime and internal initializer fields.
• Remove two unused always-on FastAgentPanel subscriptions whose query failure could unmount the signed-in chat surface.
• Add registered-handler regression coverage for plan, memory, and episodic reads, including the initializer-shaped row that reproduced the production failure.
• Reconcile the AI Elements migration/design/changelog governance after PRs feat(ai-elements): batch-1 migration + design/UI-contract governance + Codex handoff #516-refactor(ai-elements): migrate live event cards #527; the adoption program remains honestly 11/26 complete.

Production P0 reproduced

Signed-in production dogfood sent a real tool-search prompt. The panel entered Thinking..., then the FastAgentPanel error boundary replaced chat because domains/agents/agentPlanning:listPlans returned raw rows with fields rejected by its strict validator. Retry reproduced once, so the run stopped per the bounded QA rule. This patch fixes that contract mismatch and the adjacent memory variants. It does not deploy Convex out of band; the normal main-branch workflow owns deployment after merge.

Validation

• npx vitest run convex/__tests__/agentPlanning.listPlans.test.ts --reporter=verbose (7/7)
• npx vitest run src/features/agents/components/FastAgentPanel --reporter=dot (203 passed, 19 skipped)
• npx vitest run src/design/designSystem.test.ts --reporter=verbose (13/13)
• npx vitest run src/features/agents/components/FastAgentPanel/__tests__/MessageBubble.streaming.test.tsx --reporter=verbose (1/1)
• npx tsc -p convex --noEmit --pretty false
• npx tsc --noEmit --pretty false
• npm run lint:design (0 high-severity findings; existing medium/low inventory remains)
• npm run build
• Signed-in production tool-flow rerun after CI-gated merge, automatic Convex deploy, and Vercel production deployment

Release Notes

• Required checks expected: Typecheck, Runtime smoke, Build, Tier B vs preview URL.
• Merge policy: auto + squash + delete branch; never admin bypass.
• Because convex/** changed, monitor the automatic Convex Deploy run after merge. Do not run a manual production deploy.
• A follow-up evidence-only PR will record the canonical squash SHA, fresh production browser journey, and honest visual proof boundaries.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
nodebench-ai	Ready	Preview, Comment	Jul 14, 2026 1:19pm

[github-actions]

PR size advisory

This PR adds 1018 lines of substantive change. CONTRIBUTING.md defines a soft limit of ~400 LOC.

If the PR is genuinely cohesive (e.g. an architecture map, a generated migration, a deletion of a dead module), no action is needed. Otherwise consider:

• splitting into 2-3 PRs along independent concerns
• pre-discussing the architecture change in a GitHub Discussion before merge

This is advisory — it does not block the merge.

[github-actions]

✅ Dogfood Visual QA Gate: PASSED

Check	Status
Screenshots	23 captured (pass)
Walkthrough	9 chapters (pass)
Key Frames	9 extracted (pass)
Scribe Steps	8 how-to steps (pass)
Build	success

Artifacts

Download the dogfood-evidence-337fbb3 artifact from the Actions tab for full screenshots, frames, and walkthrough video.

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Generated by Dogfood QA Gate

[github-actions]

Demo: walkthrough of the surfaces this PR changed is available as a workflow artifact (pr-demo-528) at https://github.com/HomenShum/NodeBenchAI/actions/runs/29336324472