fix:Improve Claude Mds

docs/explore-notes/README.md

@@ -10,6 +10,16 @@ These sit **between** the CLAUDE.md files and the code:
   too fine-grained for a CLAUDE.md but stable enough to be worth caching. Read on demand.
 - **code** — the only source of truth.
 
+## Index
+
+| Note | Covers |
+|---|---|
+| [worker-task-pipeline](worker-task-pipeline.md) | `TaskRunner` end-to-end: config resolution, worktree, CLI invocation, streaming, commit |
+| [usage-monitoring](usage-monitoring.md) | OAuth usage endpoint, gate, throttle, per-run token accounting, usage pill/modal |
+| [external-mcp](external-mcp.md) | The `claudedo` MCP tool surface + its two test-enforced conventions |
+| [review-merge](review-merge.md) | Approve=merge-unit, verify gate, `MergeCommit`/revert, diff stack, conflict resolver |
+| [conpty-sessions](conpty-sessions.md) | Interactive/planning/list-handler launch specs + the arg-flattening gotcha |
+
 ## Rules
 
 - **Only stable structure.** Flows, responsibilities, entry points, invariants, relative