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+# SyncDeck Embedded Resonance Prediction Gating Plan
+
+## Status
+
+- [x] Confirm current repo state and branch off `main`
+- [x] Capture implementation plan before code changes
+- [ ] Extend embedded launch data contract for Resonance prediction gating
+- [ ] Add embedded child-to-parent navigation capability messaging
+- [ ] Teach SyncDeck student overlay controls to honor embedded child capabilities
+- [ ] Teach embedded Resonance student runtime to compute and publish prediction locks
+- [ ] Add/update tests for contract parsing, SyncDeck enforcement, and Resonance unlock behavior
+- [ ] Record durable contract notes in `.agent/knowledge/data-contracts.md`
+- [ ] Run required validation (`npm test`, plus follow-up checks if scope expands)
+
+## Goal
+
+Allow embedded Resonance activities inside SyncDeck to block specific SyncDeck-supplied
+student overlay navigation directions until students have locked in their prediction answers.
+
+Initial target launch option:
+
+```ts
+prediction?: {
+  block?: Array<'forward' | 'down'>
+}
+```
+
+## Agreed Responsibility Split
+
+- SyncDeck owns the embedded overlay controls and the final allow/deny behavior for navigation.
+- Resonance owns interpreting prediction-related launch options and deciding when the block should
+  be active or released.
+- The host/child boundary should stay generic so future embedded activities can report navigation
+  capabilities without SyncDeck learning activity-specific rules.
+
+## Proposed Contract Direction
+
+### 1. Embedded launch selected options
+
+Resonance should accept embedded launch options that may include:
+
+```ts
+{
+  prediction?: {
+    block?: Array<'forward' | 'down'>
+  }
+}
+```
+
+Normalization rules:
+
+- Missing or malformed `prediction` means no special gating.
+- Unsupported directions are dropped during normalization.
+- Empty `block` means no gating.
+
+### 2. Embedded child capability message
+
+Add a generic postMessage surface from embedded activity iframe to SyncDeck host:
+
+```ts
+{
+  type: 'activebits-embedded',
+  action: 'navigationCapabilities',
+  payload: {
+    canGoForward?: boolean,
+    canGoDown?: boolean
+  }
+}
+```
+
+Direction:
+
+- Child iframe -> SyncDeck host page
+- Student path first; manager path only if later needed
+
+Host behavior:
+
+- SyncDeck should treat the message as best-effort, scoped to the active embedded child iframe.
+- Missing capability fields should leave existing behavior unchanged.
+- Reported capabilities should only apply to the active slide anchor / active embedded instance.
+
+## Resonance Unlock Rule
+
+Initial unlock rule for prediction mode:
+
+- If `prediction.block` includes one or more directions, keep those directions disabled until the
+  student has submitted answers for all currently active Resonance questions in that embedded run.
+
+Notes:
+
+- This fits the current Resonance self-paced / multi-question submission model better than
+  unlocking on only the current question.
+- If future product needs differ, add an explicit `unlockWhen` option instead of overloading
+  SyncDeck logic.
+
+## Implementation Checklist
+
+### Phase 1: Contract plumbing
+
+- [ ] Add/normalize Resonance embedded prediction options from `embeddedLaunch.selectedOptions`
+- [ ] Add a small shared helper/type for `activebits-embedded` navigation capability messages if
+      a shared helper improves consistency
+- [ ] Document the new child-to-host message and Resonance selected option shape
+
+### Phase 2: SyncDeck host enforcement
+
+- [ ] Update SyncDeck student embedded iframe message handling to accept navigation capability
+      messages from the active embedded child iframe
+- [ ] Merge child-reported capability locks into existing overlay navigation decisions for
+      `forward` and `down`
+- [ ] Ensure capability state resets when the embedded child iframe changes, ends, or the student
+      leaves the embedded slide
+
+### Phase 3: Resonance child reporting
+
+- [ ] Detect embedded SyncDeck context in Resonance student view
+- [ ] Read and normalize prediction options from embedded launch bootstrap/session state
+- [ ] Compute whether prediction gating is still active from current snapshot/submission state
+- [ ] Post updated navigation capabilities to the parent host on mount and whenever submission
+      completion changes
+
+### Phase 4: Verification
+
+- [ ] Add unit tests for option normalization / malformed payload handling
+- [ ] Add SyncDeck tests that verify child-reported capabilities disable the correct overlay
+      controls and clear correctly
+- [ ] Add Resonance tests that verify prediction gating remains active until all active questions
+      are submitted
+- [ ] Run `npm test`
+
+## Risks / Watchouts
+
+- SyncDeck currently owns overlay navigation state, so stale child capability state must be cleared
+  when the active embedded iframe changes.
+- Embedded child messages should be source-checked against the active embedded iframe window so an
+  unrelated iframe cannot affect navigation.
+- Resonance should not assume all embedded contexts are SyncDeck prediction contexts; missing or
+  invalid launch options must degrade cleanly to current behavior.
+- If manager overlay controls should also honor prediction locking later, add that deliberately
+  after the student path is working rather than coupling both paths up front.
+
+## Validation Target
+
+Because this change crosses activity boundaries:
+
+- Primary gate: `npm test`
+- Add `npm run test:e2e` only if the change grows into browser-level routing/iframe interaction
+  behavior that unit tests do not cover well in this environment