[apotema]

The rotating selector now feeds a serial controller preparation phase. It snapshots the selected entities after movement, computes their nearest nodes, and publishes CMNs only at an explicit barrier. Moving an entity/ancestor, replacing the graph, destroying an entity or replacing the controller before publication rejects obsolete results. Completed off-graph results stay completed until their inputs change.

Stacked on #63 and requires the position revision API from labelle-toolkit/labelle-engine#916. Preparation is opt-in; no gameplay distance query is migrated or enabled by this PR.

• Graph-input validation detects node movement, stairs and authored-link edits even when node count is unchanged; the next advance rebuilds when needed. MovementNode entities are excluded from ordinary CMN preparation.
• Epoch invalidation retains old CMNs for debugging after opt-in. Legacy targetPosition cannot reuse stale/off-graph debugging records as a live navigation cache.
• Allocation failures expose no partial batch. Explicit cancellation leaves the cursor unchanged; processed but discarded stale results consume their turn. Scratch capacity is retained, and stats report discovery, pending entries, selection, searches and publication outcomes.
• CI now covers stacked PRs and runs the new integration suite against the exact engine#916 commit. Published library dependencies remain unchanged; the test-only build owns the engine dependency.

Validation: 13 unit tests, 81 navigation specs, 13 new controller/engine integration tests, and all 20 Flying Platform test targets passed locally. Integration tests use the actual engine/controller with the engine's headless ECS backend. They cover the publication boundary, ancestor movement, fairness, cancellation, two allocation-failure stages, world/controller replacement, graph changes, destruction, node zero and off-graph completion.

Remaining before rollout: generation-qualified read-only entity queries, remaining legacy CMN writers/known-node updates, raw mutation and participant audits, the game's preparation driver and query/retry migration. Discovery and graph validation are not bounded by the search budget; no default budget, threading, WASM measurement or FPS claim is included. See rfc/prepared-endpoint-implementation.md and tests/integration/README.md.

WASM review fix: reproduced the unsupported u64 atomic in the real controller lifecycle, then replaced it with a simulation-thread-owned u64 identity counter. Controller construction/destruction remain simulation-thread operations; future workers consume snapshots. Added zig build wasm-check and a CI step targeting wasm32 with atomics enabled, without requiring Emscripten. The check fails before the fix and passes afterward. Native unit/spec and engine integration tests pass. This fixes the reported compiler blocker; it is not a full web build or performance measurement.

[coderabbitai]

Important

Draft PR not reviewed

Draft PRs are not automatically reviewed by default.

• Trigger a manual review

To automatically review draft PRs, update your CodeRabbit configuration:

reviews:
  auto_review:
    drafts: true

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

_{Comment @coderabbitai help to get the list of available commands.}