fabro/checkpoint.json

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    "graph.goal": "# Plan: Map `reasoning_effort` to Anthropic `output_config.effort`\n\n## Context\n\nThe Anthropic Messages API now supports `output_config: { effort: \"low\" | \"medium\" | \"high\" | \"max\" }` as the recommended way to control thinking depth for Claude Opus 4.6 and Sonnet 4.6 (replacing deprecated `budget_tokens`). Fabro's unified `Request` already carries `reasoning_effort: Option<String>` and workflow nodes default it to `\"high\"`, but the Anthropic provider silently drops this field — it never appears in the API request. The OpenAI provider correctly maps it to `reasoning: { effort }`, but the Anthropic provider has no equivalent.\n\n## Single file to modify\n\n`lib/crates/fabro-llm/src/providers/anthropic.rs`\n\n## Step 1: Add failing tests\n\nAdd tests at the end of the `#[cfg(test)] mod tests` block (before line 2043's `}`). These tests reference a new `output_config` field on `ApiRequest` that doesn't exist yet, so they won't compile until Step 2.\n\n**Test A** — `build_api_request_maps_reasoning_effort_to_output_config`: Build a `Request` with `reasoning_effort: Some(\"medium\")`, call `build_api_request`, assert `api_request.output_config == Some(json!({\"effort\": \"medium\"}))`. Pattern: follows existing `build_api_request_omits_whitespace_only_system_prompt` test (line 1592).\n\n**Test B** — `build_api_request_omits_output_config_when_no_reasoning_effort`: Same but with `reasoning_effort: None`, assert `api_request.output_config.is_none()`.\n\n## Step 2: Add `output_config` field to `ApiRequest` struct\n\nAt line 108 (after `thinking`), add:\n\n```rust\n#[serde(skip_serializing_if = \"Option::is_none\")]\noutput_config: Option<serde_json::Value>,\n```\n\nUpdate every existing `ApiRequest` construction to include `output_config: None`:\n- line 1566 (serialization test)\n- line 1962 (merge_provider_options test)\n- line 1993 (merge_provider_options test)\n\nAt this point: code compiles, Test B passes, **Test A fails** (proving the bug exists).\n\n## Step 3: Map `reasoning_effort` → `output_config` in `build_api_request`\n\nAt line 1073 (next to the `thinking` extraction), add:\n\n```rust\nlet output_config = request\n    .reasoning_effort\n    .as_ref()\n    .map(|effort| serde_json::json!({\"effort\": effort}));\n```\n\nAdd `output_config,` to the `ApiRequest` construction at line 1075.\n\nThis mirrors the OpenAI provider pattern at `openai.rs:385-388`.\n\nAll tests pass.\n\n## Verification\n\n```sh\ncargo test -p fabro-llm -- anthropic::tests::build_api_request_maps_reasoning_effort\ncargo test -p fabro-llm -- anthropic::tests::build_api_request_omits_output_config\ncargo test -p fabro-llm  # all provider tests still pass\ncargo clippy --workspace -- -D warnings\n```\n",
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    "current.preamble": "Goal: # Plan: Map `reasoning_effort` to Anthropic `output_config.effort`\n\n## Context\n\nThe Anthropic Messages API now supports `output_config: { effort: \"low\" | \"medium\" | \"high\" | \"max\" }` as the recommended way to control thinking depth for Claude Opus 4.6 and Sonnet 4.6 (replacing deprecated `budget_tokens`). Fabro's unified `Request` already carries `reasoning_effort: Option<String>` and workflow nodes default it to `\"high\"`, but the Anthropic provider silently drops this field — it never appears in the API request. The OpenAI provider correctly maps it to `reasoning: { effort }`, but the Anthropic provider has no equivalent.\n\n## Single file to modify\n\n`lib/crates/fabro-llm/src/providers/anthropic.rs`\n\n## Step 1: Add failing tests\n\nAdd tests at the end of the `#[cfg(test)] mod tests` block (before line 2043's `}`). These tests reference a new `output_config` field on `ApiRequest` that doesn't exist yet, so they won't compile until Step 2.\n\n**Test A** — `build_api_request_maps_reasoning_effort_to_output_config`: Build a `Request` with `reasoning_effort: Some(\"medium\")`, call `build_api_request`, assert `api_request.output_config == Some(json!({\"effort\": \"medium\"}))`. Pattern: follows existing `build_api_request_omits_whitespace_only_system_prompt` test (line 1592).\n\n**Test B** — `build_api_request_omits_output_config_when_no_reasoning_effort`: Same but with `reasoning_effort: None`, assert `api_request.output_config.is_none()`.\n\n## Step 2: Add `output_config` field to `ApiRequest` struct\n\nAt line 108 (after `thinking`), add:\n\n```rust\n#[serde(skip_serializing_if = \"Option::is_none\")]\noutput_config: Option<serde_json::Value>,\n```\n\nUpdate every existing `ApiRequest` construction to include `output_config: None`:\n- line 1566 (serialization test)\n- line 1962 (merge_provider_options test)\n- line 1993 (merge_provider_options test)\n\nAt this point: code compiles, Test B passes, **Test A fails** (proving the bug exists).\n\n## Step 3: Map `reasoning_effort` → `output_config` in `build_api_request`\n\nAt line 1073 (next to the `thinking` extraction), add:\n\n```rust\nlet output_config = request\n    .reasoning_effort\n    .as_ref()\n    .map(|effort| serde_json::json!({\"effort\": effort}));\n```\n\nAdd `output_config,` to the `ApiRequest` construction at line 1075.\n\nThis mirrors the OpenAI provider pattern at `openai.rs:385-388`.\n\nAll tests pass.\n\n## Verification\n\n```sh\ncargo test -p fabro-llm -- anthropic::tests::build_api_request_maps_reasoning_effort\ncargo test -p fabro-llm -- anthropic::tests::build_api_request_omits_output_config\ncargo test -p fabro-llm  # all provider tests still pass\ncargo clippy --workspace -- -D warnings\n```\n\n\n## Completed stages\n- **toolchain**: success\n  - Script: `command -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1`\n  - Stdout:\n    ```\n    cargo 1.94.0 (85eff7c80 2026-01-15)\n    ```\n  - Stderr: (empty)\n- **preflight_compile**: success\n  - Script: `cargo check -q --workspace 2>&1`\n  - Stdout: (empty)\n  - Stderr: (empty)\n- **preflight_lint**: success\n  - Script: `cargo clippy -q --workspace -- -D warnings 2>&1`\n  - Stdout: (empty)\n  - Stderr: (empty)\n",
    "response.implement": "All 390 tests pass and clippy is clean with zero warnings.\n\nHere's a summary of the changes made to `lib/crates/fabro-llm/src/providers/anthropic.rs`:\n\n1. **Added `output_config` field to `ApiRequest` struct** (after `thinking`):\n   ```rust\n   #[serde(skip_serializing_if = \"Option::is_none\")]\n   output_config: Option<serde_json::Value>,\n   ```\n\n2. **Mapped `reasoning_effort` → `output_config` in `build_api_request`** — converts `request.reasoning_effort` into `{\"effort\": \"<value>\"}` JSON, mirroring how the OpenAI provider maps this field:\n   ```rust\n   let output_config = request\n       .reasoning_effort\n       .as_ref()\n       .map(|effort| serde_json::json!({\"effort\": effort}));\n   ```\n\n3. **Added two tests**:\n   - `build_api_request_maps_reasoning_effort_to_output_config` — verifies `reasoning_effort: Some(\"medium\")` produces `output_config: Some({\"effort\": \"medium\"})`\n   - `build_api_request_omits_output_config_when_no_reasoning_effort` — verifies `reasoning_effort: None` produces `output_config: None`\n\n4. **Updated all existing `ApiRequest` construction sites** in tests to include `output_config: None`.",
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    "last_response": "All 390 tests pass and clippy is clean with zero warnings.\n\nHere's a summary of the changes made to `lib/crates/fabro-llm/src/providers/anthropic.rs`:\n\n1. **Added `output_config` field to `ApiRequest`",
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        "last_response": "All 390 tests pass and clippy is clean with zero warnings.\n\nHere's a summary of the changes made to `lib/crates/fabro-llm/src/providers/anthropic.rs`:\n\n1. **Added `output_config` field to `ApiRequest`",
        "response.implement": "All 390 tests pass and clippy is clean with zero warnings.\n\nHere's a summary of the changes made to `lib/crates/fabro-llm/src/providers/anthropic.rs`:\n\n1. **Added `output_config` field to `ApiRequest` struct** (after `thinking`):\n   ```rust\n   #[serde(skip_serializing_if = \"Option::is_none\")]\n   output_config: Option<serde_json::Value>,\n   ```\n\n2. **Mapped `reasoning_effort` → `output_config` in `build_api_request`** — converts `request.reasoning_effort` into `{\"effort\": \"<value>\"}` JSON, mirroring how the OpenAI provider maps this field:\n   ```rust\n   let output_config = request\n       .reasoning_effort\n       .as_ref()\n       .map(|effort| serde_json::json!({\"effort\": effort}));\n   ```\n\n3. **Added two tests**:\n   - `build_api_request_maps_reasoning_effort_to_output_config` — verifies `reasoning_effort: Some(\"medium\")` produces `output_config: Some({\"effort\": \"medium\"})`\n   - `build_api_request_omits_output_config_when_no_reasoning_effort` — verifies `reasoning_effort: None` produces `output_config: None`\n\n4. **Updated all existing `ApiRequest` construction sites** in tests to include `output_config: None`.",
        "last_stage": "implement"
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