Fifth deep-audit pass on rolling-horizon planning is complete. Highlights:

Production hardening
Context binding & budget

runId mismatch vs active run.json → hard error (re-export required)
Export reports contextByteSize and warns if over 32 KiB
Doctor checks horizon context size
Import / dry-run

--dry-run returns projected final ids (e.g. 003 after 001/002), not normalized proposal ids
Successful import auto-refreshes horizon-context.json + frontier.json for the next cycle
contextRefreshed: true on import result
Validation warnings

Ready nodes not yet executed → warn (prefer next → verify → continue)
DAG size drift since export → warn (frontier still live-refreshed)
Status & inspect

horizon status: suggestedAction, hasReadyNodes, contextByteSize
inspect: horizon paths, stale flag, context bytes, last import
Documentation
docs/jsdp-convergence-harness.md revised with:

Anti-patterns table (what blows tokens)
Context contract + 32 KiB budget
Post-import context refresh
Full audit checklist
Tests
52/52 JSDP tests pass (4 new: projected ids, runId mismatch, context refresh, byte size).

Operator loop
jz jsdp horizon export --nodes 3    # check contextByteSize in output
jz jsdp horizon prompt --nodes 3
jz jsdp horizon validate ./horizon.json
jz jsdp horizon import ./horizon.json --dry-run   # see projectedNodeIds: ["003", ...]
jz jsdp horizon import ./horizon.json             # refreshes context for next cycle
jz jsdp horizon status                            # suggestedAction when ready nodes exist

Author: CardSorting

AGENTS.md

@@ -33,7 +33,7 @@ jz jsdp inspect && jz jsdp doctor && jz jsdp status
 ```bash
 jz jsdp export-planning-context --mode vertical-slices
 jz jsdp planning-prompt --mode vertical-slices
-jz jsdp validate-plan ./plan.json && jz jsdp import-plan ./plan.json
+jz jsdp horizon export --nodes 3 && jz jsdp horizon prompt --nodes 3 && jz jsdp horizon validate ./horizon.json && jz jsdp horizon import ./horizon.json --dry-run && jz jsdp horizon import ./horizon.json
 ```
 
 - **Full docs:** [docs/agent-operations.md](docs/agent-operations.md)