[codex] Add FlowChain local node runtime

[FlowmemoryAI]

Summary

Adds the FlowChain private/local node runtime on top of crates/flowmemory-devnet:

• Long-running local node mode with disk state, interval block production, manual tick, stop/status files, node identity, and local-file inbox processing.
• FlowChain-native transaction intake plus local local-authorized transaction receipt metadata.
• No-value local test-unit ledger with faucet records and balance transfers for transaction/faucet smoke coverage.
• Static local-file peer reconciliation for two local node processes; LAN mode is explicitly not exposed.
• Root npm wrappers for node start/stop/status, transaction submit, faucet, one-node smoke, multi-node smoke, and flowchain:full-smoke.
• Docs and acceptance matrix updates for second-computer runtime commands and current remaining gaps.

Scope

Allowed folders touched:

• crates/flowmemory-devnet/
• infra/scripts/
• package.json
• docs/LOCAL_DEVNET.md
• docs/FLOWCHAIN_SECOND_COMPUTER_SETUP.md
• docs/FLOWCHAIN_TESTNET_ACCEPTANCE.md

No apps/dashboard/, services/, contracts/, crypto/, or hardware/ source changes are included.

Validation

• cargo test --manifest-path crates/flowmemory-devnet/Cargo.toml passed.
• npm run flowchain:node:smoke passed.
• npm run flowchain:multi-node:smoke passed.
• npm run flowchain:full-smoke passed after installing local root, dashboard, and crypto dependencies.
• git diff --check passed.
• Branch rebased on current origin/main before push.

Notes and Boundaries

• Local balances are private/local test units only, not tokenomics.
• Static peer reconciliation is local-file based for second-computer validation; LAN networking is not exposed.
• Control-plane query coverage and dashboard/workbench runtime rendering remain subsystem follow-ups.

HQ Required Review Metadata (2026-05-14)

Issue status: Original #99 lane is closed on GitHub; needs new/open issue if work remains
Worktree / branch ownership: E:\FlowMemory\flowmemory-chain
Allowed folders: crates/flowmemory-devnet/, infra/scripts/, package.json, docs/LOCAL_DEVNET.md, docs/FLOWCHAIN_SECOND_COMPUTER_SETUP.md, docs/FLOWCHAIN_TESTNET_ACCEPTANCE.md
Forbidden folders: apps/dashboard/, services/, contracts/, crypto/, hardware/, unrelated docs
Exact checks recorded:

• cargo test --manifest-path crates/flowmemory-devnet/Cargo.toml; npm run flowchain:node:smoke; npm run flowchain:multi-node:smoke; npm run flowchain:full-smoke after installing root/dashboard/crypto dependencies; git diff --check; GitHub CI checks listed below.
• GitHub CI Repository hygiene: SUCCESS
• GitHub CI Contracts: SUCCESS
• GitHub CI Services and launch core: SUCCESS
• GitHub CI Launch-core acceptance command: SUCCESS
• GitHub CI Crypto: SUCCESS
• GitHub CI Dashboard: SUCCESS
• GitHub CI Local devnet: SUCCESS
• GitHub CI Hardware POC: SUCCESS
  HQ readiness: Draft; merge state DIRTY; close as superseded or refresh against current main and a new/open issue.

[FlowmemoryAI]

HQ review blocker, 2026-05-14: before merge readiness review, please update the PR body to include the linked issue #99, allowed folders, forbidden folders, worktree path, and exact checks run with results. The current changed-file scope includes crates/flowmemory-devnet/, runtime wrapper scripts, docs, and package.json; the PR body needs to state the intended scope and prove it with local checks, including git diff --check.

[FlowmemoryAI]

HQ reconciliation note, 2026-05-14: GitHub now shows linked runtime issue #99 as closed. Before merge review, please either close this draft if it was superseded by merged main, or refresh the PR body with the exact remaining delta and a new/open issue reference for anything still needed.