Document accepted chunk map export

docs/internal/overview.md

@@ -50,6 +50,7 @@ required normalized artifacts have crossed the typed handoff.
 | `internal/framework/promptfs` | Builds module prompt filesystems from module-owned and caller-provided shared prompt assets. |
 | `internal/framework/checkpoint` | Root-based checkpoint loading, recording, identity, and payload serialization. |
 | `internal/framework/chunkplan` | Source-addressed chunk-plan filesystem storage, envelope validation, and atomic publication. |
+| `internal/framework/chunkmap` | Strict durable accepted chunk-map construction, schema, validation, cloning, and serialization. |
 | `internal/framework/debug` | Root-based framework and LLM debug recording. |
 
 Framework contracts provide typed artifact, provenance-wrapper, chunk-validator,
@@ -109,7 +110,7 @@ Configuration. The implemented module packages are:
 | `internal/modules/generic/normalize/noop` | Preserves accepted merged output. |
 | `internal/modules/dnd/normalize/spells` | Canonicalizes catalog-backed spell names and exact source references, conservatively collapses duplicate casts, and reports deterministic warnings and independently scoped catalog checkpoint identity. |
 | `internal/modules/dnd/normalize/npcs` | Consolidates NPC records deterministically by canonical name, unions exact evidence, and reports bounded warnings. |
-| `internal/modules/generic/output/json` | Encodes manifests, lane payloads, warnings, and rejections as logical JSON files. |
+| `internal/modules/generic/output/json` | Encodes manifests, lane payloads, warnings, rejections, and an explicitly enabled accepted chunk map as logical JSON files. |
 
 `internal/modules/dnd/shared` owns reusable D&D prompt fragments,
 reference declarations, prompt input assembly, source-unit reference helpers,