feat(coding): add renderer conversation store

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# Task: Implement PI-110 Renderer Snapshot Patch Store
## Identity
- Task ID: 20260823-pi-renderer-store-b7e2c4a1
- Mode: Feature
- Branch: codex/20260823-pi-renderer-store-b7e2c4a1-pi-renderer-store
- Worktree: D:\Datas\OthersProjects\makelore-pi-renderer-store-b7e2c4a1
- Base commit: a0722574f3b36cb73ec8833787711e6bef1c5c54
- Owner: codex-root
- Status: In Progress
## Scope
- Implement PI-110's vendor-neutral Renderer facade and one Zustand store keyed
by stable Makelore `conversationId`.
- Consume the shared PI-010 Snapshot/Patch reducer for snapshot-first SSE,
stale-generation discard, target-only gap recovery, and reconnect.
- Own per-Conversation snapshot/run/error/queue/model/draft/unread/cursor plus
optimistic prompt request state and fine-grained selectors.
- Add focused facade/store/SSE/render-count tests. Do not migrate Chat UI,
feature-complete controls, or remove the old OpenCode store in this ticket.
## Intent And Constraints
- Base is the planner-approved PI-100 cumulative HEAD `a072257`; the exact and
sole Ready Frontier is `{PI-110}`.
- Renderer access goes only through `src/lib/host-api.ts`; the SSE facade must
initialize the cached Host token/base before constructing EventSource.
- Reuse the PI-010 contract/reducer as the single product normalization seam.
The first real Renderer consumer exposed that its Electron-only source
location requires unavailable composite-project declarations in a clean
worktree, so the canonical modules now live in `shared/` and Electron keeps
thin re-exports. Do not duplicate Pi/OpenCode event mapping or import vendor
types, paths, wire enums, credentials, or raw diagnostics.
- A generation/sequence gap invalidates and reloads only its target
Conversation. Old generations are ignored and accepted prompts are never
replayed because an event stream reconnects.
- Optimistic user identity is stable across durable reconciliation by
`clientRequestId`. Definite rejection and uncertain acceptance retain enough
request/draft/attachment state for explicit UI recovery; neither path
silently resends.
- Store updates replace only the target Conversation entry. Timeline selectors
for the selected Conversation must not rerender when a hidden Conversation
streams; hidden/sidebar consumers use lightweight summaries.
- PI-120 owns Composer and timeline UI; PI-130 owns model/thinking/queue/
compaction/interaction/subagent/changes UI; PI-140 owns old OpenCode removal.
- Real Provider remains Explicitly Waived / Accepted Risk with
`realTurnVerified=false`; macOS remains deferred to mandatory PI-150. Neither
is Pass evidence. No subagents are authorized.
## Project Context Loaded
- Task identity: `20260823-pi-renderer-store-b7e2c4a1`, feature mode, isolated
branch/worktree above, base `a0722574f3b36cb73ec8833787711e6bef1c5c54`.
- Concurrent Task Gate passed. The only semantically adjacent planning task,
`20260820-partner-create-model-parity-c83d`, still has no defined scope or
owned files. The canonical main integration task is Blocked and is not a
write target. Other active tasks concern unrelated Canvas/Robot/Learning or
review scopes.
- Planning Gate inputs read: memory index, project positioning/success fields,
current state, decision/system/architecture/domain documents, evidence/
reflection/commitment/stale indexes, PI-010 and PI-100 records, and the exact
PI-110 ticket plus relevant Spec sections.
- The canonical project-positioning fields remain placeholders; repository
guidance and the planner-owned Pi Spec/ticket are authoritative here.
- Confirmed seams: vendor-neutral contracts and strict reducer in
`electron/coding-runtime`, snapshot-first `/api/coding/events`, target GET
snapshot, `hostApiFetch`, `ensureHostApiToken`, and Zustand selector patterns.
- No accepted ADR changes product positioning or conflicts with this task.
Existing real OpenCode/provider commitments remain historical and do not
authorize a compatibility store or runtime fallback.
- Gate result: Passed.
## Plan
1. Add a Renderer-owned type surface and minimal typed `/api/coding` facade for
target snapshot, prompt acceptance, and initialized global/target SSE.
2. Implement a dependency-injectable Zustand store that keeps reducer state,
summary, draft, unread, request lifecycle, loading/recovery and errors per
Conversation while owning selection and one global event stream.
3. Route snapshot and ordered patch events through the shared reducer; ignore
stale generation, reload only a gapped target, and never replay mutations on
reconnect.
4. Add optimistic user-node/draft/attachment reconciliation and granular
selectors that preserve unrelated Conversation object identity.
5. Add facade, two-Conversation SSE, gap/reconnect, optimistic failure, vendor
boundary and render-count regressions; then run focused/full verification,
build, documentation gates, and planner review.
## Outcome
- Added a Renderer-owned product type surface and minimal typed Host facade for
target snapshots, prompt acceptance, and EventSource creation. EventSource
construction first hydrates the cached Host token/base, including a cold
Renderer process.
- Added one dependency-injectable vanilla Zustand store with React selectors.
Each Conversation owns its reducer snapshot/cursor, load and target error,
unread state, lightweight summary, draft revision/attachments, and prompt
request lifecycle. Store updates preserve unrelated Conversation identity.
- Added snapshot-first SSE ingestion, native reconnect state, stale-generation
discard, per-target sequence/generation-gap recovery, load single-flight,
and connection-generation protection. Reconnect never replays a prompt and
an obsolete connection flight cannot clear a newer one.
- Added optimistic user nodes keyed by `clientRequestId`. Durable upsert keeps
the optimistic UI node id; definite rejection restores an untouched draft
and marks the node failed; uncertain delivery restores the draft while
retaining the request/node for explicit reconciliation without resend.
- Promoted the existing product-neutral PI-010 contracts, reducer, product
detail validator, and subagent detail validator to `shared/`. Existing
Electron paths are compatibility-free source re-exports of the same
functions, so Main, Renderer, fixtures, and tests cannot drift into separate
reducer implementations.
- Added facade/store tests for two interleaved Conversations, target-only gap
recovery, stale generations, native reconnect, connection-flight ABA,
optimistic accepted/rejected/uncertain outcomes, attachment restoration,
vendor-neutral source boundaries, shared reducer identity, and render-count/
summary identity under hidden streaming.
- PI-120/130/140 boundaries remain unchanged. No Chat page or legacy OpenCode
store consumer was changed by PI-110.
## Verification
- `pnpm exec vitest run tests/unit/coding-conversations-facade.test.ts tests/unit/coding-conversations-store.test.tsx`:
2 files / 12 tests passed.
- `pnpm exec vitest run` for the two PI-110 tests plus PI-010 contracts,
coding core routes, event projector, Conversation runtime, product tools,
and subagent suites: 8 files / 75 tests passed.
- `pnpm run typecheck`: passed after the shared product seam removed the clean
Renderer -> composite Electron declaration dependency.
- `pnpm run lint:check`: passed with zero errors and the same six unrelated
Renderer warnings in `ExecutionGraphCard.tsx`, Home, and Makelore.
- `pnpm test`: 211 files / 2275 passed / 2 skipped (2277 total).
- `pnpm run build:vite`: Renderer, Electron Main, Preload, and release utility
production builds passed; existing dynamic-import and large-chunk warnings
remain.
- Electron E2E is not applicable yet: PI-110 intentionally exposes no page or
user-visible interaction. The real Chat/Composer binding and its E2E belong
to PI-120; the render-count store acceptance is covered directly here.
- Real Provider remains Explicitly Waived / Accepted Risk with
`realTurnVerified=false`. macOS x64/arm64 remains deferred to mandatory
PI-150. Neither is recorded as Pass.
## Follow-ups
- PI-120 should bind the Composer/timeline to this store without restoring any
read from `src/stores/opencode.ts`.
## Promotion Candidates
- Type: Architecture. Proposal: keep Makelore-owned Conversation contracts and
the strict Snapshot/Patch reducer in `shared/`, with Main and Renderer
importing/re-exporting that single implementation rather than depending on
Electron composite build artifacts or copying normalization logic. Evidence:
clean `pnpm run typecheck`, shared/Main function identity regression, 8-file
75-test impacted suite, and full 211-file unit/build verification. Future
impact: PI-120/130 can consume product DTOs without vendor/Main imports; any
contract amendment must retain Main/Renderer reducer equivalence.