Author orch Markdown test plan

docs/tests/orch/council-report/README.md

@@ -1,7 +1,12 @@
 # Orch `council report` Test Plan Index
 
-## Status
+## Case Files
 
-No command case files are authored yet.
-
-Use [../ROADMAP.md](../ROADMAP.md) for planned case slugs and document progress.
+| Case Slug | File | Coverage Note |
+| --- | --- | --- |
+| `council-report-defaults-to-consensus-and-majority` | [council-report-defaults-to-consensus-and-majority.md](./council-report-defaults-to-consensus-and-majority.md) | renders a markdown report that omits minority recommendations by default and writes a markdown artifact |
+| `council-report-show-all-includes-minority` | [council-report-show-all-includes-minority.md](./council-report-show-all-includes-minority.md) | includes minority recommendations when `--show all` is requested |
+| `council-report-json-shape-is-stable` | [council-report-json-shape-is-stable.md](./council-report-json-shape-is-stable.md) | returns the stable JSON report contract with summary, filtered groups, and artifact metadata |
+| `council-report-rejects-before-tally` | [council-report-rejects-before-tally.md](./council-report-rejects-before-tally.md) | rejects report generation with `invalid_state` when grouped recommendations have not been tallied yet |
+| `council-report-rejects-invalid-show` | [council-report-rejects-invalid-show.md](./council-report-rejects-invalid-show.md) | rejects unsupported `--show` bucket values with `invalid_input` |
+| `council-report-defaults-to-consensus-when-run-is-only-unanimous` | [council-report-defaults-to-consensus-when-run-is-only-unanimous.md](./council-report-defaults-to-consensus-when-run-is-only-unanimous.md) | defaults omitted `--show` to `consensus` when the run was started with `--only-unanimous` |