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Task: Implement PI-030 Pi process and RPC foundation

Identity

  • Task ID: 20260822-pi-process-rpc-d4f9a2c1
  • Mode: Feature
  • Branch: codex/20260822-pi-process-rpc-d4f9a2c1-pi-process-rpc
  • Worktree: D:\Datas\OthersProjects\makelore-pi-process-rpc-d4f9a2c1
  • Base commit: b6f693048d
  • Owner: codex
  • Status: Completed

Scope

  • Implement PI-030 Pi process and RPC foundation from the merged Pi cutover Spec/ticket graph.
  • Add the Main-private Pi worker process, strict LF JSONL framer, correlated RPC client, bounded diagnostics, and stable process/RPC errors under electron/coding-runtime/pi.
  • Add a programmable fake Pi child fixture and focused tests for chunking, malformed/oversized output, out-of-order response, event dispatch, timeout/abort, retry boundaries, crash, backpressure, stderr redaction, and process-tree cleanup.
  • Add the permanent Pi production-closure staging script, deterministic runtime manifest, closure verifier, and initial package-resource wiring.
  • Verify the locked real Pi get_state path and staged entry load/exit without connecting PI to project CRUD, Host API, Renderer, Provider catalog, worker pool, or schema migration.

Intent And Constraints

  • Pi remains pinned to @earendil-works/pi-coding-agent@0.84.2; launch through Electron executable plus ELECTRON_RUN_AS_NODE=1 with explicit RPC, offline, no-approve, and no automatic resource-discovery arguments.
  • Stdout is protocol-only; any malformed, invalid UTF-8, oversized, blank/non-JSONL, or trailing partial record invalidates and terminates only that worker. Stderr is bounded, sanitized diagnostic text and never participates in RPC.
  • Correlate every command by ID, support out-of-order responses and independent events, settle every pending request on timeout/abort/exit/invalidation, and never auto-retry prompt/steer/follow-up/fork/compact.
  • Graceful shutdown closes stdin and waits at most three seconds; forced cleanup must terminate the complete child tree. No promise or process may remain after disposal.
  • Convert the PI-000 temporary staging workaround into an explicit production bundler: copy the published package root without its installed dependency tree, remove the ten root devDependencies in the staged copy so npm 11 can consume the production-only shrinkwrap, run the repository-pinned npm with scripts/audit/fund disabled, and verify package identities/assets independent of same-version physical flattening.
  • Runtime manifest content must be deterministic and path-independent. Do not add checksum/hash sidecars, compatibility layers, dual RPC/SDK paths, Provider logic, Renderer wire types, or incidental OpenCode refactors.
  • Preserve the explicit user waivers: real Provider compatibility/concurrency/credential isolation remains unverified Accepted Risk, not Pass; macOS x64/arm64 execution remains deferred to mandatory PI-150 validation.

Project Context Loaded

  • maintain-project-docs Concurrent Task Gate and Planning Gate passed in the isolated worktree above at base b6f6930.
  • The base history contains planning a8c0806, PI-000 2bc423e, merged baseline 72f7a26, PI-010 implementation 4deba3a, and PI-010 completion record b6f6930.
  • The planner task recomputed the 18-node/31-edge DAG after PI-010 and recommended PI-030 as the unique next implementation ticket, while PI-020 remains Ready but intentionally waits.
  • Required project entry/current-state/architecture/domain/evidence/commitment records, the merged Pi Spec/tickets, PI-000 evidence, and PI-010 task record were read before planning.
  • Other locally planning task records were inspected read-only. Their scopes concern OpenCode model switching, Canvas, Robot, release, or old reviews; none owns Pi process/RPC/bundling. No semantic or file-write conflict was found.
  • The canonical project-positioning file remains a placeholder. Repository guidance, current integrated state, and the merged Pi proposal/ticket graph are the authority for this task.
  • codebase-design keeps the public worker surface small while framing, correlation, retries, diagnostics, and cleanup remain implementation-private. The user-prohibited parallel-subagent design path is not used.

Plan

  1. Implement stable process/RPC errors, the strict LF JSONL framer, and the correlated RPC client with focused unit tests.
  2. Implement the Pi worker-process lifecycle and programmable fake child, including target-only invalidation, bounded diagnostics, graceful/forced process-tree cleanup, timeout/abort, and backpressure behavior.
  3. Implement permanent production-closure staging, package/version/asset verification, deterministic manifest generation, and initial package/build resource wiring.
  4. Run the fake-child matrix, real locked Pi get_state, staged-entry load/exit, typecheck, lint, full tests, production compile, and task-documentation gates.
  5. Commit the implementation and task record, mark the task ready for integration, and send the result to the architecture/planner task.

Outcome

  • Implemented the Main-private Pi process/RPC foundation with stable process errors, strict byte-bounded LF JSONL framing, command correlation, out-of-order response handling, event dispatch, timeout/AbortSignal settlement, read-only-once retry boundaries, and write/backpressure handling.
  • Implemented an Electron-Node Pi worker with explicit offline/no-approve/no-auto-resource arguments, generation-scoped invalidation, bounded/redacted stderr and protocol diagnostics, stdin-close graceful shutdown, and full-tree forced cleanup.
  • Added a programmable fake child covering response/event/out-of-order/partial/malformed/blank/invalid UTF-8/oversized/trailing partial/timeout/retry/stderr/crash/descendant cases, plus a locked real Pi get_state smoke through Electron 43.4.0 / Node 24.18.1.
  • Implemented permanent npm 11.6.2 production staging from the published package and production-only shrinkwrap. The staged copy explicitly removes the ten mismatched root devDependencies, installs with --omit=dev --ignore-scripts, verifies package identities independently of physical flattening, inventories native/WASM assets, and emits a deterministic path-free manifest.
  • Wired host-target staging into build/package commands and product extraResources. During the production-shaped artifact probe, confirmed that Electron Builder omits a FileSet root named node_modules; corrected all OS mappings to copy runtime root files and node_modules through two explicit FileSets.
  • The controlled Electron Builder dir artifact loads Pi from resources/pi-runtime, contains all 130 expected production package identities and all 6 inventoried assets, preserves a session, exits by closing stdin, and passes two-worker local overlap/abort isolation.
  • Real Provider account verification remains explicitly waived by user decision: protocol/account compatibility, real concurrency, credential isolation, and provider-specific behavior are Accepted Risk and remain realTurnVerified=false, not Pass. macOS x64/arm64 execution remains deferred to PI-150 and is not claimed as Pass.

Verification

  • pnpm install --frozen-lockfile: passed with the repository-pinned pnpm 10.33.4.
  • Focused process/RPC/runtime tests: 4 files, 30 tests passed.
  • pnpm run typecheck: passed.
  • Scoped ESLint for every changed TypeScript/JavaScript implementation and test file: passed.
  • pnpm run lint:check: passed with 0 errors and 6 pre-existing warnings outside this task's files.
  • pnpm test: 182 files, 2118 tests passed. The first loaded full-suite run exposed two sub-250ms test-only timing budgets; those were raised while retaining the timeout semantics, then the focused and full suites passed.
  • pnpm run build:vite: passed for Renderer, Main, Preload, and release utility output; existing Vite dynamic-import and chunk-size warnings remain unchanged.
  • pnpm run bundle:pi-runtime: passed for win32-x64, generating a 130-package/6-asset production closure.
  • Repeated permanent staging generated byte-identical manifest content; the manifest contains no local path, timestamp, checksum, or build-directory identity.
  • node scripts/probe-pi-packaged-runtime.mjs --samples 1 --timeout-ms 10000 --report release/pi-runtime-probe-result.json: passed against the production-shaped resources/pi-runtime layout. Packaged closure had zero missing/relocated packages and zero missing assets; cold ready was 610 ms, warm ready 580 ms, and both measured exits were 13 ms by stdin close.
  • Forced Windows child-tree cleanup test passed; no macOS execution was performed by explicit user direction.

Follow-ups

  • PI-040 may consume the process foundation after PI-020 supplies schema v2; it owns Provider catalog, secrets, managed prompt/skill/resource projection, and must not move those concerns into this worker.
  • PI-050 may compose this single-worker primitive into the worker pool/session registry after PI-010, PI-020, PI-030, and PI-040 are integrated.
  • PI-150 must run final release-artifact validation for Windows/Linux and the explicitly deferred macOS x64/arm64 targets. The real Provider waiver stays Accepted Risk unless the user later requests non-blocking evidence collection.

Promotion Candidates

  • Target: Pi runtime packaging architecture and final PI-150 verifier guidance. Proposal: record that Electron Builder unconditionally skips a FileSet source root named node_modules; production Pi resources therefore require one FileSet for the staged root excluding node_modules and a second FileSet rooted at staged node_modules. Evidence: the first production-shaped controlled artifact omitted all 130 dependencies and 6 assets; the two-FileSet mapping produced zero missing packages/assets and loaded the real Pi entry from resources/pi-runtime. Future impact: prevents a later release build from silently shipping only the Pi root package while dropping its production dependency closure. Semantic conflicts: none; this refines the existing resources/pi-runtime packaging contract without changing runtime ownership.
  • Target: Pi runtime staging architecture. Proposal: promote npm 11.6.2 plus staged-copy root-devDependency removal and identity-based closure validation as the permanent reproducible handling for the published Pi 0.84.2 package/shrinkwrap mismatch. Evidence: clean staging, flattening fixture, deterministic manifest comparison, and packaged load/exit all passed. Future impact: PI-150 can reuse the same builder and verifier rather than recreating the PI-000 temporary workaround. Semantic conflicts: none; the source package and frozen shrinkwrap remain unmodified.