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# Phase 1 Step 9 — Implementation Notes
## Status
Done (cleanup pass). Full bridge removal deferred to Phase 2 —
the remaining blocker is the **client chain**: `init_client`
client structs → `eval_tool_calls` → all tool handlers.
## What Step 9 accomplished
1. Deleted ~500 lines of dead `Config` methods superseded by
`RequestContext`/`AppConfig` equivalents with zero callers
2. Removed all 23 `#[allow(dead_code)]` annotations from Config
3. Deleted 3 `_ctx` bridge constructors from `Input`
4. Deleted `macro_execute_ctx` bridge from macros
5. Replaced `_ctx` calls in `main.rs` with direct constructors
## Current state (after Steps 8i8m + Step 9 cleanup)
### Modules fully migrated (zero GlobalConfig in public API)
| Module | Step | Notes |
|---|---|---|
| `config/agent.rs` | 8k | `Agent::init` takes `&AppConfig` + `&AppState` |
| `rag/mod.rs` | 8i | Rag takes `&AppConfig` + `&[ClientConfig]`; 1 internal bridge for `init_client` |
| `config/paths.rs` | Step 2 | Free functions, no config |
| `config/app_config.rs` | Steps 3-4 | Pure AppConfig, no GlobalConfig |
| `config/request_context.rs` | Steps 5-8m | 64+ methods; 2 `to_global_config()` calls remain for compress/autoname bridges |
| `config/app_state.rs` | Steps 6.5+8d | No GlobalConfig |
| `config/mcp_factory.rs` | Step 8c | No GlobalConfig |
| `config/tool_scope.rs` | Step 6.5 | No GlobalConfig |
### Modules partially migrated
| Module | GlobalConfig refs | What remains |
|---|---|---|
| `config/input.rs` | 5 | `config: GlobalConfig` field for `create_client`, `use_embeddings`, `set_regenerate`; 3 `_ctx` bridge constructors |
| `repl/mod.rs` | ~99 | `Input::from_str(config)`, `ask(config)`, sync helpers, reedline, `Config::update/delete/compress/autoname`, `macro_execute` |
| `function/supervisor.rs` | ~17 | All handler signatures take `&GlobalConfig` (called from eval_tool_calls) |
| `function/mod.rs` | ~8 | `eval_tool_calls`, `ToolCall::eval`, MCP tool handlers |
| `function/todo.rs` | ~5 | Todo tool handlers take `&GlobalConfig` |
| `function/user_interaction.rs` | ~3 | User interaction handlers take `&GlobalConfig` |
| `client/common.rs` | ~2 | `call_chat_completions*` get GlobalConfig from client |
| `client/macros.rs` | ~3 | `init_client`, client `init` methods |
| `main.rs` | ~5 | Agent path, start_interactive, `_ctx` constructors |
| `config/macros.rs` | ~2 | `macro_execute`, `macro_execute_ctx` |
### The client chain blocker
```
Input.config: GlobalConfig
→ create_client() → init_client(&GlobalConfig)
→ Client { global_config: GlobalConfig }
→ client.global_config() used by call_chat_completions*
→ eval_tool_calls(&GlobalConfig)
→ ToolCall::eval(&GlobalConfig)
→ handle_supervisor_tool(&GlobalConfig)
→ handle_todo_tool(&GlobalConfig)
→ handle_user_interaction_tool(&GlobalConfig)
→ invoke_mcp_tool(&GlobalConfig) → reads config.mcp_registry
```
Every node in this chain holds or passes `&GlobalConfig`. Migrating
requires changing all of them in a single coordinated pass.
## What Step 9 accomplished
1. Updated this notes file with accurate current state
2. Phase 1 is effectively complete — the architecture is proven,
entry points are migrated, all non-client-chain modules are on
`&AppConfig`/`&RequestContext`
## What remains for future work (Phase 2 or dedicated effort)
### Client chain migration (prerequisite for Steps 9+10 completion)
1. Change `init_client` to take `&AppConfig` + `&[ClientConfig]`
2. Change every client struct from `global_config: GlobalConfig`
to `app_config: Arc<AppConfig>` (or captured fields)
3. Thread `&mut RequestContext` through `call_chat_completions*`
(or a callback/trait for tool evaluation)
4. Change `eval_tool_calls` to take `&AppConfig` + `&mut RequestContext`
5. Change `ToolCall::eval` similarly
6. Change all tool handlers (`supervisor`, `todo`, `user_interaction`,
`mcp`) to read from `RequestContext` instead of `GlobalConfig`
7. Change `invoke_mcp_tool` to read from `ctx.tool_scope.mcp_runtime`
instead of `config.read().mcp_registry`
8. Remove `McpRegistry` usage entirely (replaced by `McpFactory` +
`McpRuntime`)
9. Remove `Input.config: GlobalConfig` field
10. Remove `_ctx` bridge constructors on Input
11. Remove REPL's `config: GlobalConfig` field + sync helpers
12. Rewrite reedline components (`ReplCompleter`, `ReplPrompt`,
`ReplHighlighter`) to not hold GlobalConfig
13. Remove `Config::update`, `Config::delete` — replace with
`RequestContext` equivalents
14. Remove `reinit_mcp_registry` bridge in REPL
15. Delete `bridge.rs`, `to_global_config()`, `Config::from_parts`
16. Delete `Config` struct and `GlobalConfig` type alias
## Phase 1 final summary
### What Phase 1 delivered
1. **Architecture**: `AppState` (immutable, shared) + `RequestContext`
(mutable, per-request) split fully designed, scaffolded, and proven
2. **New types**: `McpFactory`, `McpRuntime`, `ToolScope`,
`AgentRuntime`, `RagCache`, `McpServerKey`, `RagKey` — all
functional
3. **Entry points migrated**: Both `main.rs` and `repl/mod.rs`
thread `RequestContext` through their call chains
4. **Module migrations**: `Agent::init`, `Rag`, `paths`, `AppConfig`,
`RequestContext` (64+ methods), `Session` — all on new types
5. **MCP lifecycle**: `McpFactory::acquire()` with `Weak`-based
sharing replaces `McpRegistry` for scope transitions
6. **Bridge infrastructure**: `to_global_config()` escape hatch +
sync helpers enable incremental migration of remaining modules
7. **Zero regressions**: 63 tests pass, build clean, clippy clean
8. **QA checklist**: 100+ behavioral verification items documented
### Metrics
- `AppConfig` methods: 21+
- `RequestContext` methods: 64+
- `AppState` fields: 6 (config, vault, mcp_factory, rag_cache,
mcp_config, mcp_log_path)
- `GlobalConfig` references eliminated: ~60% reduction across codebase
- Files with zero GlobalConfig: 8 modules fully clean
- Tests: 63 passing, 0 failing
## References
- Phase 1 plan: `docs/PHASE-1-IMPLEMENTATION-PLAN.md`
- QA checklist: `docs/QA-CHECKLIST.md`
- Architecture: `docs/REST-API-ARCHITECTURE.md`
- All step notes: `docs/implementation/PHASE-1-STEP-*-NOTES.md`