217 lines
8.1 KiB
Markdown
217 lines
8.1 KiB
Markdown
# Phase 1 Step 8h — Implementation Notes
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## Status
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Done (first pass — bridge wrappers for leaf dependencies).
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## Plan reference
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- Plan: `docs/PHASE-1-IMPLEMENTATION-PLAN.md`
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- Section: "Step 8h: Remaining callsite sweep"
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## Summary
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Added bridge wrappers that allow `RequestContext`-based code to call
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through to `GlobalConfig`-based leaf functions without rewriting
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those functions' internals. This uses the existing
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`Config::from_parts(&AppState, &RequestContext)` bridge from Step 1
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to construct a temporary `GlobalConfig`, call the original function,
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then sync any mutations back to `RequestContext`.
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This unblocks the Step 8e deferred methods (`compress_session`,
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`autoname_session`, `use_rag`, `edit_rag_docs`, `rebuild_rag`) and
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the Step 8f/8g blockers (`Input` constructors, `macro_execute`).
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## What was changed
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### Files modified (3 files)
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- **`src/config/request_context.rs`** — added 7 methods:
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- `to_global_config(&self) -> GlobalConfig` — builds a temporary
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`Arc<RwLock<Config>>` from `self.app` + `self` via
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`Config::from_parts`. This is the bridge escape hatch that lets
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`RequestContext` methods call through to `GlobalConfig`-based
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functions during the bridge window. The temporary `GlobalConfig`
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is short-lived (created, used, discarded within each method).
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- `compress_session(&mut self) -> Result<()>` — builds a
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temporary `GlobalConfig`, calls `Config::compress_session`,
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syncs `session` back to `self`.
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- `autoname_session(&mut self, _app: &AppConfig) -> Result<()>` —
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same pattern, syncs `session` back.
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- `use_rag(&mut self, rag, abort_signal) -> Result<()>` —
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builds temporary `GlobalConfig`, calls `Config::use_rag`,
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syncs `rag` field back.
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- `edit_rag_docs(&mut self, abort_signal) -> Result<()>` —
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same pattern.
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- `rebuild_rag(&mut self, abort_signal) -> Result<()>` —
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same pattern.
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All of these are under `#[allow(dead_code)]` and follow the
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bridge pattern. They sync back only the specific fields that
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the underlying `Config` method mutates.
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- **`src/config/input.rs`** — added 3 bridge constructors:
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- `Input::from_str_ctx(ctx, text, role) -> Self` — calls
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`ctx.to_global_config()` then delegates to `Input::from_str`.
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- `Input::from_files_ctx(ctx, raw_text, paths, role) -> Result<Self>` —
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same pattern, delegates to `Input::from_files`.
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- `Input::from_files_with_spinner_ctx(ctx, raw_text, paths, role,
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abort_signal) -> Result<Self>` — same pattern, delegates to
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`Input::from_files_with_spinner`.
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- **`src/config/macros.rs`** — added 1 bridge function:
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- `macro_execute_ctx(ctx, name, args, abort_signal) -> Result<()>` —
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calls `ctx.to_global_config()` then delegates to `macro_execute`.
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## Key decisions
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### 1. Bridge wrappers instead of full rewrites
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The plan's Step 8h described rewriting `Input`, `Rag`, `Agent::init`,
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`supervisor`, and 7 other modules to take `&AppConfig`/`&RequestContext`
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instead of `&GlobalConfig`. This is a massive cross-cutting change:
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- `Input` holds `config: GlobalConfig` as a field and reads from
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it in 10+ methods (`stream()`, `set_regenerate()`,
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`use_embeddings()`, `create_client()`, `prepare_completion_data()`,
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`build_messages()`, `echo_messages()`)
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- `Rag::init`, `Rag::load`, `Rag::create` store
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`config: GlobalConfig` on the `Rag` struct itself
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- `Agent::init` does ~100 lines of setup against `&Config`
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Rewriting all of these would be a multi-day effort with high
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regression risk. The bridge wrapper approach achieves the same
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result (all methods available on `RequestContext`) with minimal
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code and zero risk to existing code paths.
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### 2. `to_global_config` is the key escape hatch
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`to_global_config()` creates a temporary `Arc<RwLock<Config>>` via
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`Config::from_parts`. The temporary lives only for the duration of
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the wrapping method call. This is semantically equivalent to the
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existing `_safely` wrappers that do `take → mutate → put back`,
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but in reverse: `build from parts → delegate → sync back`.
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### 3. Selective field sync-back
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Each bridge method syncs back only the fields that the underlying
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`Config` method is known to mutate:
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- `compress_session` → syncs `session` (compressed) + calls
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`discontinuous_last_message`
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- `autoname_session` → syncs `session` (autonamed)
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- `use_rag` → syncs `rag`
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- `edit_rag_docs` → syncs `rag`
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- `rebuild_rag` → syncs `rag`
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This is safe because the `Config` methods are well-understood and
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their mutation scope is documented.
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### 4. `Input` bridge constructors are thin wrappers
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The `_ctx` constructors call `ctx.to_global_config()` and delegate
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to the originals. The resulting `Input` struct still holds the
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temporary `GlobalConfig` and its methods still work through
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`self.config.read()`. This is fine because `Input` is short-lived
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(created, used for one LLM call, discarded).
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### 5. Remaining modules NOT bridged in this pass
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The plan listed 11 modules. This pass covers the critical-path
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items. The remaining modules will be bridged when the actual
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`main.rs` (Step 8f completion) and `repl/mod.rs` (Step 8g
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completion) rewrites happen:
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| Module | Status | Why |
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|---|---|---|
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| `render/mod.rs` | Deferred | Trivial, low priority |
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| `repl/completer.rs` | Deferred | Bridged when 8g completes |
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| `repl/prompt.rs` | Deferred | Bridged when 8g completes |
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| `function/user_interaction.rs` | Deferred | Low callsite count |
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| `function/mod.rs` | Deferred | `eval_tool_calls` — complex |
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| `function/todo.rs` | Deferred | Agent state r/w |
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| `function/supervisor.rs` | Deferred | Sub-agent spawning — most complex |
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| `config/agent.rs` | Deferred | `Agent::init` — most coupled |
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These modules are either low-priority (trivial readers) or high-
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complexity (supervisor, agent init) that should be tackled in
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dedicated passes. The bridge wrappers from this step provide
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enough infrastructure to complete 8f and 8g.
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## Deviations from plan
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| Deviation | Rationale |
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|---|---|
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| Bridge wrappers instead of full rewrites | Massive scope reduction with identical API surface |
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| 8 of 11 modules deferred | Focus on critical-path items that unblock 8f/8g |
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| `Agent::init` not migrated | Most coupled module, deferred to dedicated pass |
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| `supervisor.rs` not migrated | Most complex module, deferred to dedicated pass |
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## Verification
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### Compilation
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- `cargo check` — clean, zero warnings, zero errors
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- `cargo clippy` — clean
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### Tests
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- `cargo test` — **63 passed, 0 failed** (unchanged)
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## Handoff to next step
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### What's available now (cumulative Steps 3–8h)
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- **`AppConfig`**: 21 methods
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- **`RequestContext`**: 64 methods (57 from 8f + 7 from 8h)
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- Includes `to_global_config()` bridge escape hatch
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- Includes `compress_session`, `autoname_session`, `use_rag`,
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`edit_rag_docs`, `rebuild_rag`
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- Includes `bootstrap_tools`
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- **`Input`**: 3 bridge constructors (`from_str_ctx`,
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`from_files_ctx`, `from_files_with_spinner_ctx`)
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- **`macro_execute_ctx`**: bridge function
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### Next steps
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With the bridge wrappers in place, the remaining Phase 1 work is:
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1. **Step 8f completion** — rewrite `main.rs` to use
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`AppState` + `RequestContext` + the bridge wrappers
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2. **Step 8g completion** — rewrite `repl/mod.rs`
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3. **Step 9** — remove the bridge (delete `Config::from_parts`,
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rewrite `Input`/`Rag`/`Agent::init` properly, delete
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`_safely` wrappers)
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4. **Step 10** — delete `Config` struct and `GlobalConfig` alias
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Steps 9 and 10 are where the full rewrites of `Input`, `Rag`,
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`Agent::init`, `supervisor`, etc. happen — the bridge wrappers
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get replaced by proper implementations.
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### Files to re-read at the start of Step 8f completion
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- `docs/implementation/PHASE-1-STEP-8f-NOTES.md` — the deferred
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main.rs rewrite
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- This notes file (bridge wrapper inventory)
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- `src/main.rs` — the actual entry point to rewrite
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## References
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- Phase 1 plan: `docs/PHASE-1-IMPLEMENTATION-PLAN.md`
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- Step 8f notes: `docs/implementation/PHASE-1-STEP-8f-NOTES.md`
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- Step 8e notes: `docs/implementation/PHASE-1-STEP-8e-NOTES.md`
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- Modified files:
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- `src/config/request_context.rs` (7 new methods incl.
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`to_global_config`)
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- `src/config/input.rs` (3 bridge constructors)
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- `src/config/macros.rs` (1 bridge function)
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