Add incremental analysis work planning

docs/internal/stage-analyze.md

@@ -73,6 +73,19 @@ Supported source families:
   separately identifies manifest records removed from current configuration.
   A record is current only when its fingerprint version and value match and its
   configured output still passes manifest-authoritative evidence validation.
+- owns a read-only typed work planner. Its explicit targets are enabled
+  artifacts by default or the exact normalized `--artifacts` selection when
+  supplied. It closes targets over configured prerequisites, orders the closure
+  topologically, reuses current members, and schedules every non-current member
+  before its dependents.
+- force applies only to explicit targets. A current prerequisite is reused
+  unless it is itself an explicit forced target; disabled prerequisites may be
+  rebuilt when required, while unrelated disabled artifacts are excluded.
+- the work plan carries explicit targets, prerequisite-only work, deterministic
+  execution and reuse lists, invalidated and removed records, and a cloned
+  projected record collection. Valid unrelated configured records survive the
+  projection, removed records are omitted, and legacy files never become
+  current without regeneration.
 - resolves previous-session sources from local `previous/` cache only.
 - runs optional render-debug, then artifact execution.
 - validates non-empty output files and materializes canonical outputs.
@@ -112,4 +125,5 @@ Supported source families:
   `internal/stage/analyze_fingerprint.go`,
   `internal/stage/analyze_fingerprint_test.go`,
   `internal/stage/analyze_reconciliation.go`, and
-  `internal/stage/analyze_reconciliation_test.go`
+  `internal/stage/analyze_reconciliation_test.go`,
+  `internal/stage/analyze_plan.go`, and `internal/stage/analyze_plan_test.go`