chore(release): finalize github-copilot-sdk v0.9.1 prep

- sync bilingual plugin READMEs, docs mirrors, and root highlight sections for v0.9.1

- add comprehensive EN/CN release notes covering features, fixes, docs, and i18n updates

- enforce full-coverage release-note rule in release-prep skill for future releases

plugins/pipes/github-copilot-sdk/v0.9.1.md

@@ -0,0 +1,32 @@
+# v0.9.1 Release Notes
+
+## Overview
+This release upgrades the GitHub Copilot SDK Pipe into a more autonomous and ecosystem-aware Agent integration for OpenWebUI, with stronger web-search behavior, clearer terminology, and improved tool-filtering reliability.
+
+## New Features
+- Prioritize autonomous web search by always enabling `web_search` for Agent-side decision making.
+- Add explicit ecosystem injection messaging for OpenWebUI Tools, MCP servers, OpenAPI servers, and Skills.
+- Improve interactive delivery guidance for HTML Artifacts and RichUI workflows.
+- Add recommendation for installing the Visual Explainer skill for high-quality visual rendering.
+- Restore top-level onboarding callouts (`IMPORTANT` + `TIP`) in plugin docs for companion dependency and BYOK guidance.
+- Refresh root README and root README_CN feature highlights to reflect the Agent-focused v0.9.1 positioning.
+- Add/align docs mirrors so plugin README and `docs/plugins/pipes/` content stay synchronized.
+
+## Bug Fixes
+- Fix MCP tool filtering reliability when `function_name_filter_list` or UI-selected tool scopes are used.
+- Normalize tool ID handling to avoid accidental filtering failures with `server:mcp:` prefixes.
+- Standardize TODO terminology presentation to avoid malformed text artifacts.
+- Remove duplicated language-consistency statements in both English and Chinese docs while keeping the intended single statement.
+- Fix malformed CN Visual Explainer installation text formatting.
+- Correct Indonesian status wording (`Agén` -> `Agen`) for better locale consistency.
+
+## Migration Notes
+- No breaking changes in Valve keys or runtime behavior are introduced in this release.
+- Existing deployments can upgrade directly to `0.9.1`.
+
+## Companion Plugins
+- GitHub Copilot SDK Files Filter remains the required companion for raw-file handling before RAG interception.
+
+## Documentation Scope
+- Updated plugin docs: `README.md`, `README_CN.md`, and mirrored docs pages (`github-copilot-sdk.md`, `github-copilot-sdk.zh.md`).
+- Updated project-level highlights in root `README.md` and `README_CN.md`.