fabro/checkpoint.json

{
  "timestamp": "2026-03-20T01:15:21.583607Z",
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    "response.implement": "Both changes look correct:\n\n1. **Inside `execute_with_retry`** (line 1080): `StageStarted` is now emitted at the top of the `for attempt in 1..=policy.max_attempts` loop, using the loop variable `attempt` for the correct attempt number.\n\n2. **In `run_inner`** (line 1862): The old `StageStarted` emission that was before the loop has been removed. The `StageStart` hook remains outside the loop as specified.\n\nLet me do a final summary of the changes:\n\n## Summary\n\n**Problem:** When a stage fails with a transient error and is retried, the CLI progress UI freezes because `StageFailed` removes the stage from `active_stages`, but no `StageStarted` event is emitted for the retry attempt, so subsequent agent events silently drop.\n\n**Fix:** Two edits in `lib/crates/fabro-workflows/src/engine.rs`:\n\n1. **Added `StageStarted` emission inside the retry loop** (in `execute_with_retry`): Moved the event emission to the top of the `for attempt in 1..=policy.max_attempts` loop so every attempt — including retries — emits `StageStarted` with the correct `attempt` number.\n\n2. **Removed the old `StageStarted` emission before the loop** (in `run_inner`): The pre-loop emission with hardcoded `attempt: 1` was removed since it's now handled inside the retry loop. The `StageStart` hook remains outside the loop (hooks shouldn't re-fire on retries).\n\n**New test:** `retry_emits_stage_started_per_attempt` — Creates a handler (`FailOnceThenSucceedHandler`) that returns a retryable error on the first call and succeeds on the second, then verifies that `StageStarted` is emitted twice with `attempt: 1` and `attempt: 2`.\n\n**Verification:**\n- ✅ `cargo test -p fabro-workflows --lib` — all 867 tests pass\n- ✅ `cargo clippy --workspace -- -D warnings` — no warnings",
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    "graph.model_stylesheet": "\n            * { backend: api; model: claude-opus-4-6;}\n        ",
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    "current.preamble": "Goal: # Emit `StageStarted` on retry attempts\n\n## Context\n\nWhen a stage fails with a transient error and is retried, the CLI progress UI freezes because:\n\n1. `StageFailed` calls `finish_stage()`, removing the stage from `active_stages`\n2. The retry loop in the engine (`continue` at line 1198) re-enters handler execution **without emitting `StageStarted`**\n3. All subsequent agent events for the retry attempt silently drop (no matching entry in `active_stages`)\n\nThe `StageStarted` event already has `attempt` and `max_attempts` fields, so emitting it per-attempt is the intended design — it just wasn't wired up.\n\n## Changes\n\n### 1. Engine: emit `StageStarted` at the top of the retry loop\n\n**File:** `lib/crates/fabro-workflows/src/engine.rs`\n\nMove the `StageStarted` emission from before the loop (line 1852) to inside the loop, right after `for attempt in 1..=policy.max_attempts {` (line 1079). This way every attempt — including retries — emits the event with the correct `attempt` number.\n\nThe existing emission at line 1852 gets replaced, not duplicated. The `attempt` value comes directly from the loop variable (converted via `usize::try_from`).\n\n### 2. Engine: move StageStart hook inside the loop (or keep it outside)\n\nThe `StageStart` hook block (lines 1862-1895) currently runs once before the loop. It should stay outside — hooks shouldn't re-fire on retries. Only the `StageStarted` event emission moves inside.\n\n### 3. UI: no changes needed\n\n`on_stage_started` in `run_progress.rs` already handles being called for the same `node_id` — it inserts a fresh `ActiveStage` into the map, creating a new spinner. The `StageFailed` handler correctly finishes the old spinner. The natural event sequence becomes:\n\n```\nStageStarted  (attempt 1) → spinner created\nStageFailed   (will_retry) → spinner finished with ✗\nStageStarted  (attempt 2) → new spinner created\nAgent events  → attach to new spinner\nStageCompleted (attempt 2) → spinner finished with ✓\n```\n\n## Verification\n\n1. `cargo test -p fabro-workflows` — existing tests pass\n2. `cargo clippy --workspace -- -D warnings` — no warnings\n3. Manual: run a workflow that hits a transient LLM error (or mock one) and verify the CLI shows the retry spinner with tool calls\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- **implement**: success\n  - Model: claude-opus-4-6, 42.2k tokens in / 12.1k out\n  - Files: /home/daytona/workspace/lib/crates/fabro-workflows/src/engine.rs\n- **simplify_opus**: success\n  - Model: claude-opus-4-6, 27.5k tokens in / 10.9k out\n  - Files: /home/daytona/workspace/lib/crates/fabro-workflows/src/engine.rs\n- **simplify_gpt**: fail\n- **verify**: success\n  - Script: `cargo clippy -q --workspace -- -D warnings 2>&1 && cargo nextest run --cargo-quiet --workspace --status-level fail 2>&1`\n  - Stdout:\n    ```\n    warning: function `init_repo_with_remote` is never used\n        --> lib/crates/fabro-workflows/src/git.rs:1153:8\n         |\n    1153 |     fn init_repo_with_remote(dir: &Path) -> (std::path::PathBuf, std::path::PathBuf) {\n         |        ^^^^^^^^^^^^^^^^^^^^^\n         |\n         = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default\n    \n    ────────────\n     Nextest run ID 6b6eeac2-e45e-43f2-bb54-3e71487b1986 with nextest profile: default\n        Starting 3214 tests across 41 binaries (177 tests skipped)\n    ────────────\n         Summary [  10.679s] 3214 tests run: 3214 passed, 177 skipped\n    ```\n  - Stderr: (empty)\n",
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    "last_response": "Here's a summary of the review and what was fixed:\n\n## Review Summary\n\n### Critical Bug Found and Fixed\n\nThe `implement` step moved the `StageStarted` emission entirely from the main run loop into `ex",
    "internal.run_id": "01KM4C5NR7A6KVFNK6DDE3FP4R",
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    "response.simplify_opus": "Here's a summary of the review and what was fixed:\n\n## Review Summary\n\n### Critical Bug Found and Fixed\n\nThe `implement` step moved the `StageStarted` emission entirely from the main run loop into `execute_with_retry`. This broke the existing integration test `hook_stage_start_skip_bypasses_node` because when a `StageStart` hook skips a node, `execute_with_retry` is never called — so `StageStarted` was never emitted for skipped nodes.\n\n**Fix:** Split the emission into two sites:\n1. **Main loop** (before the hook): Emits `StageStarted` with `attempt: 1` — ensures skipped nodes still get the event\n2. **Retry loop** (inside `execute_with_retry`): Emits `StageStarted` only for `attempt > 1` — provides the spinner restart that was the original goal\n\n### Review Agent Findings (no additional changes needed)\n\n- **Code Reuse**: The event-collection pattern in the new test (`Arc<Mutex<Vec<WorkflowRunEvent>>>` + `on_event` closure) follows the existing convention used in 5+ other tests. No helper exists to extract, and introducing one would be over-engineering for test code.\n- **Code Quality**: The production change is clean — no redundant state, no parameter sprawl, no copy-paste issues. The `usize::try_from(u32).unwrap_or(usize::MAX)` is technically infallible on all supported platforms but matches the existing codebase convention.\n- **Efficiency**: The string allocations inside the retry loop (`node.label().to_string()`, `node_script(node)`, etc.) are negligible since `max_attempts` is typically 1-3 and these are dominated by actual handler execution time (LLM calls, commands, etc.).\n\n### Verification\n- `cargo test -p fabro-workflows` — all **179 tests pass** (including the previously failing `hook_stage_start_skip_bypasses_node`)\n- `cargo clippy --workspace -- -D warnings` — clean, no warnings",
    "graph.goal": "# Emit `StageStarted` on retry attempts\n\n## Context\n\nWhen a stage fails with a transient error and is retried, the CLI progress UI freezes because:\n\n1. `StageFailed` calls `finish_stage()`, removing the stage from `active_stages`\n2. The retry loop in the engine (`continue` at line 1198) re-enters handler execution **without emitting `StageStarted`**\n3. All subsequent agent events for the retry attempt silently drop (no matching entry in `active_stages`)\n\nThe `StageStarted` event already has `attempt` and `max_attempts` fields, so emitting it per-attempt is the intended design — it just wasn't wired up.\n\n## Changes\n\n### 1. Engine: emit `StageStarted` at the top of the retry loop\n\n**File:** `lib/crates/fabro-workflows/src/engine.rs`\n\nMove the `StageStarted` emission from before the loop (line 1852) to inside the loop, right after `for attempt in 1..=policy.max_attempts {` (line 1079). This way every attempt — including retries — emits the event with the correct `attempt` number.\n\nThe existing emission at line 1852 gets replaced, not duplicated. The `attempt` value comes directly from the loop variable (converted via `usize::try_from`).\n\n### 2. Engine: move StageStart hook inside the loop (or keep it outside)\n\nThe `StageStart` hook block (lines 1862-1895) currently runs once before the loop. It should stay outside — hooks shouldn't re-fire on retries. Only the `StageStarted` event emission moves inside.\n\n### 3. UI: no changes needed\n\n`on_stage_started` in `run_progress.rs` already handles being called for the same `node_id` — it inserts a fresh `ActiveStage` into the map, creating a new spinner. The `StageFailed` handler correctly finishes the old spinner. The natural event sequence becomes:\n\n```\nStageStarted  (attempt 1) → spinner created\nStageFailed   (will_retry) → spinner finished with ✗\nStageStarted  (attempt 2) → new spinner created\nAgent events  → attach to new spinner\nStageCompleted (attempt 2) → spinner finished with ✓\n```\n\n## Verification\n\n1. `cargo test -p fabro-workflows` — existing tests pass\n2. `cargo clippy --workspace -- -D warnings` — no warnings\n3. Manual: run a workflow that hits a transient LLM error (or mock one) and verify the CLI shows the retry spinner with tool calls\n",
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        "last_response": "Here's a summary of the review and what was fixed:\n\n## Review Summary\n\n### Critical Bug Found and Fixed\n\nThe `implement` step moved the `StageStarted` emission entirely from the main run loop into `ex",
        "response.simplify_opus": "Here's a summary of the review and what was fixed:\n\n## Review Summary\n\n### Critical Bug Found and Fixed\n\nThe `implement` step moved the `StageStarted` emission entirely from the main run loop into `execute_with_retry`. This broke the existing integration test `hook_stage_start_skip_bypasses_node` because when a `StageStart` hook skips a node, `execute_with_retry` is never called — so `StageStarted` was never emitted for skipped nodes.\n\n**Fix:** Split the emission into two sites:\n1. **Main loop** (before the hook): Emits `StageStarted` with `attempt: 1` — ensures skipped nodes still get the event\n2. **Retry loop** (inside `execute_with_retry`): Emits `StageStarted` only for `attempt > 1` — provides the spinner restart that was the original goal\n\n### Review Agent Findings (no additional changes needed)\n\n- **Code Reuse**: The event-collection pattern in the new test (`Arc<Mutex<Vec<WorkflowRunEvent>>>` + `on_event` closure) follows the existing convention used in 5+ other tests. No helper exists to extract, and introducing one would be over-engineering for test code.\n- **Code Quality**: The production change is clean — no redundant state, no parameter sprawl, no copy-paste issues. The `usize::try_from(u32).unwrap_or(usize::MAX)` is technically infallible on all supported platforms but matches the existing codebase convention.\n- **Efficiency**: The string allocations inside the retry loop (`node.label().to_string()`, `node_script(node)`, etc.) are negligible since `max_attempts` is typically 1-3 and these are dominated by actual handler execution time (LLM calls, commands, etc.).\n\n### Verification\n- `cargo test -p fabro-workflows` — all **179 tests pass** (including the previously failing `hook_stage_start_skip_bypasses_node`)\n- `cargo clippy --workspace -- -D warnings` — clean, no warnings"
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    "preflight_compile": {
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      "notes": "Script completed: cargo check -q --workspace 2>&1",
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    "toolchain": {
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        "command.output": "cargo 1.94.0 (85eff7c80 2026-01-15)\n",
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      "notes": "Script completed: 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",
      "duration_ms": 147
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        "last_response": "Both changes look correct:\n\n1. **Inside `execute_with_retry`** (line 1080): `StageStarted` is now emitted at the top of the `for attempt in 1..=policy.max_attempts` loop, using the loop variable `atte",
        "response.implement": "Both changes look correct:\n\n1. **Inside `execute_with_retry`** (line 1080): `StageStarted` is now emitted at the top of the `for attempt in 1..=policy.max_attempts` loop, using the loop variable `attempt` for the correct attempt number.\n\n2. **In `run_inner`** (line 1862): The old `StageStarted` emission that was before the loop has been removed. The `StageStart` hook remains outside the loop as specified.\n\nLet me do a final summary of the changes:\n\n## Summary\n\n**Problem:** When a stage fails with a transient error and is retried, the CLI progress UI freezes because `StageFailed` removes the stage from `active_stages`, but no `StageStarted` event is emitted for the retry attempt, so subsequent agent events silently drop.\n\n**Fix:** Two edits in `lib/crates/fabro-workflows/src/engine.rs`:\n\n1. **Added `StageStarted` emission inside the retry loop** (in `execute_with_retry`): Moved the event emission to the top of the `for attempt in 1..=policy.max_attempts` loop so every attempt — including retries — emits `StageStarted` with the correct `attempt` number.\n\n2. **Removed the old `StageStarted` emission before the loop** (in `run_inner`): The pre-loop emission with hardcoded `attempt: 1` was removed since it's now handled inside the retry loop. The `StageStart` hook remains outside the loop (hooks shouldn't re-fire on retries).\n\n**New test:** `retry_emits_stage_started_per_attempt` — Creates a handler (`FailOnceThenSucceedHandler`) that returns a retryable error on the first call and succeeds on the second, then verifies that `StageStarted` is emitted twice with `attempt: 1` and `attempt: 2`.\n\n**Verification:**\n- ✅ `cargo test -p fabro-workflows --lib` — all 867 tests pass\n- ✅ `cargo clippy --workspace -- -D warnings` — no warnings"
      },
      "notes": "Stage completed: implement",
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        "command.output": "warning: function `init_repo_with_remote` is never used\n    --> lib/crates/fabro-workflows/src/git.rs:1153:8\n     |\n1153 |     fn init_repo_with_remote(dir: &Path) -> (std::path::PathBuf, std::path::PathBuf) {\n     |        ^^^^^^^^^^^^^^^^^^^^^\n     |\n     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default\n\n────────────\n Nextest run ID 6b6eeac2-e45e-43f2-bb54-3e71487b1986 with nextest profile: default\n    Starting 3214 tests across 41 binaries (177 tests skipped)\n────────────\n     Summary [  10.679s] 3214 tests run: 3214 passed, 177 skipped\n"
      },
      "notes": "Script completed: cargo clippy -q --workspace -- -D warnings 2>&1 && cargo nextest run --cargo-quiet --workspace --status-level fail 2>&1",
      "duration_ms": 70931
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      "notes": "Script completed: cargo fmt --all 2>&1",
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