brynary-fabro[bot] da3610af59 Unified dry-run via Handler::simulate() (#14) ... This PR introduces a unified dry-run mechanism by adding a `Handler::simulate()` trait method and a `dispatch_handler()` routing function that selects between `simulate()` and `execute()` based on `services.dry_run`. Previously, dry-run behavior was scattered inconsistently across handlers—`CommandHandler` checked `services.dry_run` inline, `AgentHandler`/`PromptHandler`/`FanInHandler` relied on the backend being `None`, and `WaitHandler`/`HumanHandler` had no dry-run support at all (sleeping or blocking on input for real). This made dry-run behavior fragile and difficult to extend to new handlers. The new design adds an `Outcome::simulated(node_id)` factory for standardized dry-run results, a default `simulate()` implementation on the `Handler` trait that returns a generic simulated success, and per-handler overrides where custom context updates are needed. `CommandHandler` populates empty output/stderr, `AgentHandler` and `PromptHandler` set simulated `last_stage`/`last_response`/`response.{id}` context keys, `FanInHandler` calls `heuristic_select()` without an LLM, `HumanHandler` auto-selects the first choice, and `ParallelHandler` dispatches child branches through `dispatch_handler()` while skipping git worktree operations. The inline `dry_run` check in `CommandHandler::execute()` is removed, and both call sites in the engine (`execute_with_retry` and parallel branch dispatch) now route through `dispatch_handler()`. All existing dry-run tests are updated to test `simulate()` directly, and new tests verify that `dispatch_handler()` correctly routes based on the `dry_run` flag and that each handler's `simulate()` produces the expected context updates and outcome structure. ### Fabro Details <details> <summary>Ran 7 stages in 24m 57s for $4.72</summary> | Stage | Duration | Cost | Retries | |---|---|---|---| | start | 0s | – | 0 | | toolchain | 0s | – | 0 | | preflight_compile | 0s | – | 0 | | preflight_lint | 0s | – | 0 | | implement | 0s | $3.29 | 0 | | simplify | 0s | $1.42 | 0 | | verify | 0s | – | 0 | | **Total** | **24m 57s** | **$4.72** | **0** | </details> <details> <summary>Ran <code>ImplementAndSimplify.fabro</code> (10 nodes and 13 edges)</summary> ```dot digraph ImplementAndSimplify { graph [ goal="Implement and simplify", model_stylesheet=" * { backend: api; model: claude-opus-4-6;} " ] rankdir=LR start [shape=Mdiamond, label="Start"] exit [shape=Msquare, label="Exit"] toolchain [label="Toolchain", shape=parallelogram, 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", max_retries=0] preflight_compile [label="Preflight Compile", shape=parallelogram, script="cargo check 2>&1", max_retries=0] preflight_lint [label="Preflight Lint", shape=parallelogram, script="cargo clippy -- -D warnings 2>&1", max_retries=0] fix_lints [label="Fix Lints", prompt="The preflight lint step failed. Read the build output from context and fix all clippy lint warnings.", max_visits=3] implement [label="Implement", prompt="Read the plan file referenced in the goal and implement every step. Make all the code changes described in the plan."] simplify [label="Simplify", prompt="@prompts/simplify.md"] verify [label="Verify", shape=parallelogram, script="cargo clippy -- -D warnings 2>&1 && cargo test 2>&1", goal_gate=true, retry_target="fixup"] fixup [label="Fixup", prompt="The verify step failed. Read the build output from context and fix all clippy lint warnings and test failures.", max_visits=3] start -> toolchain toolchain -> preflight_compile [condition="outcome=success"] toolchain -> exit preflight_compile -> preflight_lint [condition="outcome=success"] preflight_compile -> exit preflight_lint -> implement [condition="outcome=success"] preflight_lint -> fix_lints fix_lints -> preflight_lint implement -> simplify -> verify verify -> exit [condition="outcome=success"] verify -> fixup fixup -> verify } ``` </details> ⚒️ Generated with [Fabro](https://fabro.sh) --------- Co-authored-by: Fabro <noreply@fabro.sh> Co-authored-by: Fabro Assistant <assistant@fabro.dev> Co-authored-by: Bryan Helmkamp <bryan@brynary.com> Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>		2026-03-15 19:55:03 -04:00
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crates	Unified dry-run via Handler::simulate() (#14)	2026-03-15 19:55:03 -04:00
packages/fabro-api-client	Rename [feature_flags] to [features] (#11)	2026-03-15 19:54:40 -04:00