docs: align project documentation with ollama provider

PROJECT_STATE.md

@@ -6,11 +6,11 @@ ChatGPT MCP Server
 
 ## Status
 
-Planning complete. Phase 0 complete. Phase 1 complete. Phase 2 complete. Phase 3 complete. Phase 4 complete. Task 5.1 complete. Task 5.2 complete. Task 5.3 complete. Task 5.4 complete. Task 5.5 complete. Phase 6 complete. Phase 7 complete. Phase 8 complete (Task 8.0 — Manual Export Provider).
+Planning complete. Phase 0 complete. Phase 1 complete. Phase 2 complete. Phase 3 complete. Phase 4 complete. Task 5.1 complete. Task 5.2 complete. Task 5.3 complete. Task 5.4 complete. Task 5.5 complete. Phase 6 complete. Phase 7 complete. Phase 8 complete (Task 8.0 — Manual Export Provider). Phase 9 complete (Task 9.1 — Ollama Provider).
 
 ## Current Phase
 
-All planned phases complete. Provider abstraction (Phase 6), integration tests (Phase 7), and manual export provider (Phase 8) finished.
+All planned phases complete. Provider abstraction (Phase 6), integration tests (Phase 7), manual export provider (Phase 8), and Ollama provider (Phase 9) finished. **3 supported providers: openai, manual, ollama.**
 
 ## Completed Tasks
 
@@ -137,6 +137,43 @@ Project-local Claude Code discovery configured:
   **Tests:** 56 new tests in `test/providers/manual-export.test.js` + 9 new in `test/providers/factory.test.js`
   - Total: 644 passing tests across 21 test files, zero regressions
 - `.claude/` added to `.gitignore` (no machine-specific paths committed)
+
+- Task 9.1 — Ollama Provider Implementation ✅
+
+  **Provider implementation:**
+  - `src/providers/ollama.js` — Local AI provider using Ollama `/api/chat` endpoint via native `fetch()` (zero new dependencies)
+  - Implements `{ send(request, config) => Promise<{ content: string }> }` interface
+  - Returns structured advisory responses from local LLM
+  - Error categories: `OllamaTimeoutError`, `OllamaModelNotFoundError`, `OllamaValidationError`, `OllamaApiNotAvailableError`, `OllamaRequestError`
+
+  **Defaults:**
+  - Base URL: `http://localhost:11434`
+  - Model: `qwen3:latest`
+  - Temperature: `0.2`
+  - Timeout: `60` seconds
+
+  **Environment variables:**
+  - `OLLAMA_BASE_URL` — Ollama API endpoint (default: `http://localhost:11434`)
+  - `OLLAMA_MODEL` — Model name (default: `qwen3:latest`)
+  - `OLLAMA_TEMPERATURE` — Sampling temperature (default: `0.2`)
+  - `OLLAMA_TIMEOUT` — Request timeout in seconds (default: `60`)
+
+  **Factory integration:**
+  - `"ollama"` added to SUPPORTED_PROVIDERS whitelist alongside `"openai"` and `"manual"`
+  - `CHATGPT_MCP_PROVIDER=ollama` switches all tool handlers to local Ollama mode
+  - Defaults to `"openai"` when not set — OpenAI behaviour unchanged
+  - Same provider interface as openai and manual providers
+
+## Phase 9 Completion Summary — Ollama Provider ✅
+
+Three providers now supported: `openai`, `manual`, `ollama`.
+
+- Factory in `src/providers/factory.js`: `SUPPORTED_PROVIDERS = Set(["openai", "manual", "ollama"])`
+- All three providers implement `{ send(request, config) => Promise<{ content: string }> }`
+- Provider selection via `CHATGPT_MCP_PROVIDER` environment variable
+- Zero additional dependencies — Ollama provider uses native `fetch()` only
+
+## Next Pending
 - README.md updated with Setup, MCP Tools, and Running sections
 - MCP config snippet uses `"command": "npm"`, `"args": ["start"]` — no absolute paths
 - All 5 tools documented in README
@@ -203,11 +240,11 @@ Provider abstraction layer decouples tool handlers from OpenAI implementation:
 ## Phase 7 Completion Summary — Tests ✅
 
 All tests rewritten and verified:
-- 579 passing tests across 20 test files (up from ~523)
-- 28 new provider/config tests in factory.test.js, openai.test.js, env.test.js
+- 644 passing tests across 21 test files (Phase 8 added 65 tests; Phase 9 has no new tests yet)
+- Provider/config tests in factory.test.js, openai.test.js, env.test.js, manual-export.test.js
 - All handler tests use `{ loadConfig, createProvider }` mock pattern
 - `npm start` → tools/list shows identical 5 tools with unchanged schemas
 
 ## Next Pending
 
-No pending tasks. MVP is complete. Future work roadmap: Ollama provider implementation, Anthropic provider, streaming responses, response caching, structured output parsing.
+No pending tasks. MVP is complete. Future work roadmap: Anthropic provider, streaming responses, response caching, structured output parsing, cost tracking per tool call.