feat: Complete LLMX v0.1.0 - Rebrand from Codex with LiteLLM Integration

This release represents a comprehensive transformation of the codebase from Codex to LLMX,
enhanced with LiteLLM integration to support 100+ LLM providers through a unified API.

## Major Changes

### Phase 1: Repository & Infrastructure Setup
- Established new repository structure and branching strategy
- Created comprehensive project documentation (CLAUDE.md, LITELLM-SETUP.md)
- Set up development environment and tooling configuration

### Phase 2: Rust Workspace Transformation
- Renamed all Rust crates from `codex-*` to `llmx-*` (30+ crates)
- Updated package names, binary names, and workspace members
- Renamed core modules: codex.rs → llmx.rs, codex_delegate.rs → llmx_delegate.rs
- Updated all internal references, imports, and type names
- Renamed directories: codex-rs/ → llmx-rs/, codex-backend-openapi-models/ → llmx-backend-openapi-models/
- Fixed all Rust compilation errors after mass rename

### Phase 3: LiteLLM Integration
- Integrated LiteLLM for multi-provider LLM support (Anthropic, OpenAI, Azure, Google AI, AWS Bedrock, etc.)
- Implemented OpenAI-compatible Chat Completions API support
- Added model family detection and provider-specific handling
- Updated authentication to support LiteLLM API keys
- Renamed environment variables: OPENAI_BASE_URL → LLMX_BASE_URL
- Added LLMX_API_KEY for unified authentication
- Enhanced error handling for Chat Completions API responses
- Implemented fallback mechanisms between Responses API and Chat Completions API

### Phase 4: TypeScript/Node.js Components
- Renamed npm package: @codex/codex-cli → @valknar/llmx
- Updated TypeScript SDK to use new LLMX APIs and endpoints
- Fixed all TypeScript compilation and linting errors
- Updated SDK tests to support both API backends
- Enhanced mock server to handle multiple API formats
- Updated build scripts for cross-platform packaging

### Phase 5: Configuration & Documentation
- Updated all configuration files to use LLMX naming
- Rewrote README and documentation for LLMX branding
- Updated config paths: ~/.codex/ → ~/.llmx/
- Added comprehensive LiteLLM setup guide
- Updated all user-facing strings and help text
- Created release plan and migration documentation

### Phase 6: Testing & Validation
- Fixed all Rust tests for new naming scheme
- Updated snapshot tests in TUI (36 frame files)
- Fixed authentication storage tests
- Updated Chat Completions payload and SSE tests
- Fixed SDK tests for new API endpoints
- Ensured compatibility with Claude Sonnet 4.5 model
- Fixed test environment variables (LLMX_API_KEY, LLMX_BASE_URL)

### Phase 7: Build & Release Pipeline
- Updated GitHub Actions workflows for LLMX binary names
- Fixed rust-release.yml to reference llmx-rs/ instead of codex-rs/
- Updated CI/CD pipelines for new package names
- Made Apple code signing optional in release workflow
- Enhanced npm packaging resilience for partial platform builds
- Added Windows sandbox support to workspace
- Updated dotslash configuration for new binary names

### Phase 8: Final Polish
- Renamed all assets (.github images, labels, templates)
- Updated VSCode and DevContainer configurations
- Fixed all clippy warnings and formatting issues
- Applied cargo fmt and prettier formatting across codebase
- Updated issue templates and pull request templates
- Fixed all remaining UI text references

## Technical Details

**Breaking Changes:**
- Binary name changed from `codex` to `llmx`
- Config directory changed from `~/.codex/` to `~/.llmx/`
- Environment variables renamed (CODEX_* → LLMX_*)
- npm package renamed to `@valknar/llmx`

**New Features:**
- Support for 100+ LLM providers via LiteLLM
- Unified authentication with LLMX_API_KEY
- Enhanced model provider detection and handling
- Improved error handling and fallback mechanisms

**Files Changed:**
- 578 files modified across Rust, TypeScript, and documentation
- 30+ Rust crates renamed and updated
- Complete rebrand of UI, CLI, and documentation
- All tests updated and passing

**Dependencies:**
- Updated Cargo.lock with new package names
- Updated npm dependencies in llmx-cli
- Enhanced OpenAPI models for LLMX backend

This release establishes LLMX as a standalone project with comprehensive LiteLLM
integration, maintaining full backward compatibility with existing functionality
while opening support for a wide ecosystem of LLM providers.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Sebastian Krüger <support@pivoine.art>

.github/workflows/issue-deduplicator.yml

@@ -9,23 +9,23 @@ on:
 jobs:
   gather-duplicates:
     name: Identify potential duplicates
-    if: ${{ github.event.action == 'opened' || (github.event.action == 'labeled' && github.event.label.name == 'codex-deduplicate') }}
+    if: ${{ github.event.action == 'opened' || (github.event.action == 'labeled' && github.event.label.name == 'llmx-deduplicate') }}
     runs-on: ubuntu-latest
     permissions:
       contents: read
     outputs:
-      codex_output: ${{ steps.codex.outputs.final-message }}
+      llmx_output: ${{ steps.llmx.outputs.final-message }}
     steps:
       - uses: actions/checkout@v5
 
-      - name: Prepare Codex inputs
+      - name: Prepare LLMX inputs
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
           set -eo pipefail
 
-          CURRENT_ISSUE_FILE=codex-current-issue.json
-          EXISTING_ISSUES_FILE=codex-existing-issues.json
+          CURRENT_ISSUE_FILE=llmx-current-issue.json
+          EXISTING_ISSUES_FILE=llmx-existing-issues.json
 
           gh issue list --repo "${{ github.repository }}" \
             --json number,title,body,createdAt \
@@ -41,18 +41,18 @@ jobs:
             | jq '.' \
             > "$CURRENT_ISSUE_FILE"
 
-      - id: codex
-        uses: openai/codex-action@main
+      - id: llmx
+        uses: valknar/llmx-action@main
         with:
-          openai-api-key: ${{ secrets.CODEX_OPENAI_API_KEY }}
+          openai-api-key: ${{ secrets.LLMX_OPENAI_API_KEY }}
           allow-users: "*"
           model: gpt-5
           prompt: |
             You are an assistant that triages new GitHub issues by identifying potential duplicates.
 
             You will receive the following JSON files located in the current working directory:
-            - `codex-current-issue.json`: JSON object describing the newly created issue (fields: number, title, body).
-            - `codex-existing-issues.json`: JSON array of recent issues (each element includes number, title, body, createdAt).
+            - `llmx-current-issue.json`: JSON object describing the newly created issue (fields: number, title, body).
+            - `llmx-existing-issues.json`: JSON array of recent issues (each element includes number, title, body, createdAt).
 
             Instructions:
             - Compare the current issue against the existing issues to find up to five that appear to describe the same underlying problem or request.
@@ -89,16 +89,16 @@ jobs:
       - name: Comment on issue
         uses: actions/github-script@v8
         env:
-          CODEX_OUTPUT: ${{ needs.gather-duplicates.outputs.codex_output }}
+          LLMX_OUTPUT: ${{ needs.gather-duplicates.outputs.llmx_output }}
         with:
           github-token: ${{ github.token }}
           script: |
-            const raw = process.env.CODEX_OUTPUT ?? '';
+            const raw = process.env.LLMX_OUTPUT ?? '';
             let parsed;
             try {
               parsed = JSON.parse(raw);
             } catch (error) {
-              core.info(`Codex output was not valid JSON. Raw output: ${raw}`);
+              core.info(`LLMX output was not valid JSON. Raw output: ${raw}`);
               core.info(`Parse error: ${error.message}`);
               return;
             }
@@ -112,7 +112,7 @@ jobs:
             const filteredIssues = issues.filter((value) => String(value) !== currentIssueNumber);
 
             if (filteredIssues.length === 0) {
-              core.info('Codex reported no potential duplicates.');
+              core.info('LLMX reported no potential duplicates.');
               return;
             }
 
@@ -121,7 +121,7 @@ jobs:
               '',
               ...filteredIssues.map((value) => `- #${String(value)}`),
               '',
-              '*Powered by [Codex Action](https://github.com/openai/codex-action)*'];
+              '*Powered by [LLMX Action](https://github.com/valknar/llmx-action)*'];
 
             await github.rest.issues.createComment({
               owner: context.repo.owner,
@@ -130,11 +130,11 @@ jobs:
               body: lines.join("\n"),
             });
 
-      - name: Remove codex-deduplicate label
-        if: ${{ always() && github.event.action == 'labeled' && github.event.label.name == 'codex-deduplicate' }}
+      - name: Remove llmx-deduplicate label
+        if: ${{ always() && github.event.action == 'labeled' && github.event.label.name == 'llmx-deduplicate' }}
         env:
           GH_TOKEN: ${{ github.token }}
           GH_REPO: ${{ github.repository }}
         run: |
-          gh issue edit "${{ github.event.issue.number }}" --remove-label codex-deduplicate || true
-          echo "Attempted to remove label: codex-deduplicate"
+          gh issue edit "${{ github.event.issue.number }}" --remove-label llmx-deduplicate || true
+          echo "Attempted to remove label: llmx-deduplicate"