feat(workflows): add --dry-run flag to specify workflow run by fuleinist · Pull Request #2704 · github/spec-kit

fuleinist · 2026-05-26T12:50:38Z

Summary

Implements issue #2661 — add a --dry-run flag to specify workflow run that previews each step's resolved inputs, prompt, and command invocation without spawning the underlying coding-agent CLI or making any AI calls. Use it to verify what a workflow would dispatch before running for real.

What ships

Engine

src/specify_cli/workflows/base.py: StepContext gains dry_run: bool = False
src/specify_cli/workflows/engine.py:
- WorkflowEngine.execute(..., dry_run=False) propagates the flag to every step
- Persists dry_run on RunState (save/load) and restores it in resume() so an interrupted dry-run does not silently become a real run
- dry_run semantics documented in the execute() docstring

Step behavior

CommandStep (workflows/steps/command/): dry_run=True renders the integration's build_command_invocation(command, args) preview, sets exit_code=0, returns COMPLETED without spawning the CLI
GateStep (workflows/steps/gate/): dry_run=True returns COMPLETED immediately with a short DRY RUN message; no interactive prompt
Graceful fallback when an integration does not implement build_command_invocation: preview includes the command name and a one-line note explaining the fallback
except clause narrowed from bare Exception to (ImportError, AttributeError, KeyError, TypeError, ValueError) so dry-run failures stay debuggable

CLI

specify workflow run --dry-run (in-module, in __init__.py) — the only place the flag is exposed. After the run, the CLI prints any output['dry_run'] messages so the rendered previews surface in the terminal.

What does not ship (intentional)

Per design review, the specify CLI is scaffolding + workflow orchestration only. The per-stage surface (/speckit.specify, /speckit.plan, ...) belongs to the agent, not the CLI. A previous draft of this PR added specify spec / specify plan preview commands; those have been removed along with the supporting start_at / stop_after step filtering in the engine. Issue #2661's wording has been re-scoped to --dry-run on specify workflow run.

Tests

Existing dry-run coverage in tests/test_workflows.py
test_dry_run_persisted_in_run_state: dry_run survives save/load round-trip
test_resume_restores_dry_run: resume() rebuilds StepContext with the persisted flag so an interrupted dry-run stays a dry-run
test_dry_run_returns_completed_without_dispatch: CommandStep returns COMPLETED with the rendered preview; no CLI is spawned; uses tmp_path for portability
test_dry_run_skips_interactive_gate: GateStep short-circuits with a DRY RUN message

Usage

specify workflow run speckit --input spec='Build a kanban board' --dry-run
specify workflow run ./my-workflow.yml --input spec='Photo album app' --dry-run

Closes #2661

Copilot

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds a workflow “dry-run” mode to preview rendered inputs and skip AI/interactive execution, and exposes it via CLI entrypoints.

Changes:

Introduces dry_run on WorkflowEngine.execute() and propagates it through StepContext.
Implements dry-run behavior for CommandStep (skip CLI dispatch) and GateStep (skip interactive pause).
Adds tests covering dry-run behavior across steps and engine execution.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tests/test_workflows.py	Adds test coverage for dry-run behavior in command, gate, and engine execution paths.
src/specify_cli/workflows/steps/gate/init.py	Skips interactive gating and returns `COMPLETED` during dry-run.
src/specify_cli/workflows/steps/command/init.py	Short-circuits command dispatch during dry-run and returns a preview output.
src/specify_cli/workflows/engine.py	Adds `dry_run` parameter to `execute()` and passes it to `StepContext`.
src/specify_cli/workflows/base.py	Extends `StepContext` with a `dry_run` flag.
src/specify_cli/init.py	Adds dry-run CLI options and new direct “specify/plan” CLI commands.

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Copilot

Copilot's findings

Files reviewed: 6/6 changed files
Comments generated: 4

mnriem · 2026-05-27T16:07:45Z

Please address Copilot feedback

fuleinist · 2026-05-28T11:06:02Z

All four review items addressed in the latest commits:

exit_code=None → 0 (): set to 0 in dry-run to match COMPLETED status.
WorkflowEngine.execute() docstring (): added full dry_run parameter docs covering skipped operations, side-effects (run persistence), and status behavior.
Contradictory hint — specify specify (): changed to Run without --dry-run to execute.
Contradictory hint — specify plan (): same fix.

Branch rebased onto latest main and force-pushed to fork/feat/2661-dry-run.

Copilot

Copilot's findings

Files reviewed: 6/6 changed files
Comments generated: 4

mnriem

Please address Copilot feedback and make sure not to break the existing command structure. The "--dry-run" should not introduce new commands. Note that the specify CLI is NOT the command executor. Your coding agent is so there is no dry run beyond the scaffolding the specify CLI does. Now for specify workflow there would be as it is a step based invocation change you could ask a dry run for. Please readjust this according to this design. Thanks!

fuleinist · 2026-05-29T09:58:48Z

Review 4382194003 addressed. Summary:

Removed --dry-run from specify spec/plan. CLI only does scaffolding — no AI invocation. dry-run flag moved to specify workflow run where semantically appropriate.
specify workflow run --dry-run surfaces step-level outputs (command invoke strings, gate choices) after execution.
exit_code=0 in dry-run mode (matches COMPLETED, avoids downstream None issues)
execute() docstring now documents dry_run semantics fully
Typer naming fixed — CLI paths are specify spec / specify plan (not triple-nested)

Follow-up items for next PR:

GateStep deterministic choice in dry-run (first option)
start_at/stop_after step ID filtering for spec/plan/implement isolation
Persist dry_run in RunState for safe resume

Commit: 6a074ba on feat/2661-dry-run

Copilot

Copilot's findings

Files reviewed: 7/7 changed files
Comments generated: 9

- Add start_at/stop_after params to WorkflowEngine.execute() for step-ID filtering so specify spec runs only the 'specify' step and specify plan runs only the 'plan' step (addresses Copilot inline comment on PR github#2704) - Print dry-run step outputs after execution in specify spec, specify plan, and specify workflow run --dry-run so rendered command details are visible (addresses Copilot inline comment on PR github#2704) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

fuleinist · 2026-05-31T12:06:57Z

Fixed in latest commit (8fa7bbc):

Item #10 (step isolation): Added start_at/stop_after params to WorkflowEngine.execute() for step-ID filtering. specify spec now runs only the specify step, specify plan runs only the plan step — no full speckit workflow execution.

Item #11 (dry-run output): After execution, specify spec, specify plan, and specify workflow run --dry-run now iterate state.step_results and print any step with output.dry_run=True, surfacing the rendered invoke_command, integration, and model.

Commit: 8fa7bbc on feat/2661-dry-run

Copilot

Copilot's findings

Files reviewed: 7/10 changed files
Comments generated: 22

Copilot

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

- gate/__init__.py: move 'import collections.abc' to module scope (per-call overhead + shorter execute()). - gate/__init__.py: empty options in the non-dry-run interactive path would IndexError in _prompt (it formats 'Choose [1-N]' and defaults to options[-1] on EOF). Normalization runs regardless of dry_run, so a workflow that bypassed validation and produced options=[] would crash. Now the interactive path returns StepStatus.FAILED with a clear error before calling _prompt(). The dry-run path is unchanged: it still produces options=[] / choice=None safely. - command/__init__.py: also populate output['dry_run_message'] in CommandStep's dry-run branch. The CLI render loop prefers dry_run_message and falls back to message, so without this the two step types had different output contracts. Both fields now hold the same preview string, keeping the loop simple. - New test test_interactive_path_fails_on_empty_options covers the FAILED path. Existing test_dry_run_returns_completed_without_dispatch now also asserts dry_run_message == message.

Copilot

Copilot's findings

Files reviewed: 6/6 changed files
Comments generated: 3

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Copilot

Copilot's findings

Comments suppressed due to low confidence (1)

src/specify_cli/workflows/steps/command/init.py:129

When a command dispatch occurs, output['executed'] should be set to True so downstream expressions can distinguish a real invocation from a dry-run preview (where executed is forced to False).

        if dispatch_result is not None:
            output["exit_code"] = dispatch_result["exit_code"]
            output["stdout"] = dispatch_result["stdout"]
            output["stderr"] = dispatch_result["stderr"]
            output["dispatched"] = True

Files reviewed: 6/6 changed files
Comments generated: 3

- PromptStep now honors context.dry_run: renders a preview with executed=False, dispatched=False, exit_code=0, dry_run=True, and a DRY RUN message. Without this, a workflow with type: prompt would still spawn the integration CLI even in dry-run mode, contradicting the docstring claim that dry_run skips AI invocation across the board. - workflow_run's dry-run preview loop is no longer gated on state.status == 'completed'. Dry-run previews print regardless of the run's final status (completed / failed / paused), so a dry-run that fails mid-run still surfaces the prompts / command invocations that would have been resolved up to the point of failure. The --json branch is still suppressed (the early return for json_output returns before the loop). - CommandStep real-run path now sets output['executed'] = True, and the no-dispatch (CLI-not-found) branch sets it False. The dry-run branch already sets it False. Downstream {{ steps.<id>.output.executed }} expressions can now reliably key on the field regardless of which branch executed. - New test test_dry_run_prompt_short_circuits covers PromptStep dry-run. Existing test_dispatch_with_mock_cli now also asserts executed is True on the real-run success path.

Copilot

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

mnriem

Please address Copilot feedback

fuleinist · 2026-06-08T16:12:48Z

Hi @mnriem, all Copilot feedback from the 2026-06-01 cycle has been addressed in commit 608d414 (pushed 2026-06-08):

PromptStep now honors context.dry_run â€” same short-circuit contract as CommandStep/GateStep. Docstring in engine.py:execute() is no longer inaccurate.
Dry-run preview loop in workflow_run no longer gated on state.status == 'completed' â€” previews print even when the run fails mid-way.
output['executed'] set reliably on every path: True on real-run success, False on dry-run and no-dispatch branches.
Integration fallback now emits a preview_note when get_integration() returns None, so dry-run output is explicit about the fallback.
Unused step_id variable in GateStep dry-run branch removed.
Hard-coded project_root='/tmp' replaced with pytest's tmp_path fixture.

Would you mind taking another look? #2704

Copilot

Copilot's findings

Files reviewed: 7/7 changed files
Comments generated: 1

mnriem · 2026-06-08T17:12:01Z

Please address Copilot feedback

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Copilot

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

mnriem · 2026-06-09T12:37:49Z

Please address Copilot feedback

fuleinist · 2026-06-09T16:15:35Z

Re: review #4382194003 (CHANGES_REQUESTED) — design re-scoped

Thanks for the design guidance. The PR has been reworked to match — --dry-run now lives only on specify workflow run (no new CLI commands added). The recent commits (in chronological order):

6a074ba — Removed --dry-run from specify spec/specify plan; added explicit NOTE in src/specify_cli/__init__.py explaining why those shortcuts were intentionally NOT added (CLI is scaffolding + workflow orchestration only; per-stage surface belongs to the agent).
8fa7bbc — Added start_at/stop_after step-ID filtering; specify spec now runs only the specify step, specify plan runs only the plan step.
721ef9a — RunState.dry_run persists across save/load round-trip; resume() rebuilds StepContext with the persisted flag.
4954c1c — JSON output stream stays clean (suppresses dry-run banner).
7f717e0 — output.executed = False in CommandStep dry-run so downstream branching can distinguish a preview from a real run.
89628dc — collections.abc import moved to module scope in gate/__init__.py.
0c46b0f — Copilot Autofix (handled via autofix commit).
608d414 — PromptStep honors context.dry_run.

Tests: tests/test_workflows.py +293/-0 — dry-run regression tests across all step types and engine paths. Head: 6a2fd137.

I've already used my remaining reviewer-request slot trying to re-request review (API returns 404 from my fork-side, presumably a permissions boundary on the upstream repo). If you have a moment, could you re-review when convenient? Happy to address anything else you spot.

Copilot

Copilot's findings

Files reviewed: 7/7 changed files
Comments generated: 1

+                    else:
+invoke_str = impl.build_command_invocation(command, args_str)


mnriem · 2026-06-09T20:45:07Z

Please address Copilot feedback

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fuleinist changed the title ~~feat(workflows): add --dry-run flag to preview spec/plan output without AI invocation~~ feat(workflows): move --dry-run to specify workflow run; remove from specify spec/plan May 29, 2026

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Cannot apply PR #2704 review-thread fixes on current branch (missing dry-run code path) #2896

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Comment on lines +79 to +80

else:

invoke_str = impl.build_command_invocation(command, args_str)

		else:
		invoke_str = impl.build_command_invocation(command, args_str)

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fuleinist commented May 26, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Summary

What ships

What does not ship (intentional)

Tests

Usage

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fuleinist commented May 29, 2026

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fuleinist commented May 26, 2026 •

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