chore: release 0.22.0 — backfill CHANGELOG and bump version

CHANGELOG.md

@@ -7,6 +7,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.22.0] - 2026-04-20
+
+### Added
+
+- **`index_built_at` on `oddkit_catalog` debug envelope** — catalog now surfaces the index build timestamp under an accurately-named field, preserving the cache-freshness diagnostic alongside the response-time `generated_at`. Landed via klappy/oddkit#125.
+
+### Fixed
+
+- **`telemetry_public` envelope conformance** — previously returned a bare `{action, result}` envelope, missing `server_time`, `assistant_text`, and `debug`. Every other tool — including `telemetry_policy` after PR #108 — already emitted the full envelope. This fix brings `telemetry_public` into conformance with the E0008.2 canon (`klappy://docs/appendices/epoch-8-2`) and adds the missing three fields on both the success path and the not-configured error path. `assistant_text` on success is derived from the row count when the result carries data rows. `result.generated_at` preserved unchanged. Landed via klappy/oddkit#124.
+
+- **`oddkit_catalog` `debug.generated_at` is response time, not cached index timestamp** — `runCatalog` previously returned `generated_at: index.generated_at` — the cached index build timestamp — producing up to 48-minute drift from envelope `server_time` in the same response. Every other handler uses `new Date().toISOString()` for this field. Fix aligns catalog with the same pattern; the cache-build timestamp is preserved as a separate, accurately-named `index_built_at` field (see Added). Landed via klappy/oddkit#125.
+
+Both bugs caught during the v0.21.1 regression test sweep.
+
 ## [0.21.1] - 2026-04-20
 
 ### Fixed

package.json

@@ -1,6 +1,6 @@
 {
   "name": "oddkit",
-  "version": "0.21.1",
+  "version": "0.22.0",
   "description": "Agent-first CLI for ODD-governed repos. Epistemic terrain rendering with portable baseline.",
   "type": "module",
   "bin": {

workers/package.json

@@ -1,6 +1,6 @@
 {
   "name": "oddkit-mcp-worker",
-  "version": "0.21.1",
+  "version": "0.22.0",
   "private": true,
   "type": "module",
   "scripts": {