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 # Release Notes
 
+- [Audita v3.0.0](v3.0.0.md)
 - [Audita v2.0.1](v2.0.1.md)
 - [Audita v2.0.0](v2.0.0.md)
 - [Audita v1.1.0](v1.1.0.md)
diff --git a/docs/releases/v3.0.0.md b/docs/releases/v3.0.0.md
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+# Audita v3.0.0
+
+Audita v3 adopts native configuration inheritance and layered PromptKit
+definitions, and allows transcript and report destinations to be selected
+independently. This is an intentional breaking release: existing PromptKit
+profile files require migration from the v2 release format.
+
+## Changes
+
+- ConfigKit is updated from v0.4.2 to v0.5.0. Application configuration supports
+  native sibling inheritance, and configuration explanations include value-free
+  inheritance provenance.
+- PromptKit is updated from v0.11.2 to v0.12.0, with both backend catalogs at
+  `v3.20260930.0`. Native keyed definitions support profile inheritance and
+  operator prompt overrides. The selected `profiles_dir` can contain profiles,
+  backends, and prompts; application backend endpoints, capacity, and credentials
+  remain authoritative.
+- Effective definitions and referenced prompt message contents are captured at
+  runtime construction. Consumed host configuration and message files are
+  protected from output collisions. Audita retains its per-call schemas, domain
+  validators, retry and repair budgets, and resilient processing behavior.
+- An explicit `--report-dir` now selects reports for either file or stdout
+  transcript output. File output without that flag still places reports beside
+  the transcript. This supports Narratio's independent output destinations;
+  debug capture remains independently selectable.
+
+## Upgrading from v2
+
+1. Convert each old PromptKit profile to a keyed definition under
+   `profiles: {<profile-id>: ...}`, remove its inner `id`, and replace
+   `base_profile` with `extends`. Profile IDs come from mapping keys rather than
+   filenames. No compatibility loader or automatic conversion is provided.
+2. Review explicit zero, omitted, and null generation controls. For example,
+   `temperature: 0` now sends an explicit zero, omission leaves the control
+   unspecified, and null suppresses an inherited control. A zero profile timeout
+   disables PromptKit's generation deadline; Audita's operation deadline still
+   applies.
+3. Select a configuration root whose final definitions are valid. PromptKit now
+   validates unused definitions too, including backend references, and conflicting
+   values within a directory source group are errors. The maintained examples
+   use separate [local](../../examples/profiles/local/) and
+   [service](../../examples/profiles/service/) roots. Runtime source edits take
+   effect on the next invocation.
+4. Rename any application backend literally named `extends` and update its
+   profile references. ConfigKit now reserves that key for inheritance.
+5. Validate the migrated installation with
+   `audita config validate --config /path/to/config.yml`, including any selected
+   testing overlay. Application configuration continues to use `version: 2`.
+
+The [configuration reference](../config.md#promptkit-profiles-and-operator-prompts)
+contains the migrated format and presence rules. Start from the maintained
+[local](../../examples/minimal-config.yml),
+[service](../../examples/production-config.yml), or
+[application inheritance](../../examples/configkit-inheritance.yml) examples.
+The [CLI reference](../cli.md) describes report selection, and the
+[release procedure](../release.md) describes source publication and asynchronous
+Linux binary delivery.
+
+[COPYRIGHT](https://gitea.maximumdirect.net/eric/audita/src/tag/v3.0.0/COPYRIGHT) | [LICENSE](https://gitea.maximumdirect.net/eric/audita/src/tag/v3.0.0/LICENSE) | [ATTRIBUTION](https://gitea.maximumdirect.net/eric/audita/src/tag/v3.0.0/docs/oss/attribution.md)