Imported from kirkchen/beat (skills/plan/SKILL.md). Install upstream with npx skills add kirkchen/beat --skill plan. Copyright stays with the author.

Plan the execution — read spec artifacts, review from multiple perspectives, then generate tasks.md.

<decision_boundary>

Use for:

Breaking down spec artifacts into implementation tasks (tasks.md)
Multi-role review of an execution plan before implementation
Re-generating or updating tasks for an existing change

NOT for:

Creating spec artifacts like proposal, gherkin, or design.md (use /beat:design)
Exploring ideas or investigating a problem (use /beat:explore)
Implementing code (use /beat:apply)
Verifying implementation (use /beat:verify)

Trigger examples:

"Break down the tasks" / "Create execution plan" / "Plan the implementation" / "Review and generate tasks"
Should NOT trigger: "design a new feature" / "write gherkin for X" / "implement the change"

</decision_boundary>

You MUST have at least one spec artifact done (gherkin or proposal) before proceeding. Do NOT create tasks from a description alone — spec artifacts are the input.

When the multi-role review rejects an alternative with a load-bearing reason that would otherwise have to be re-litigated by future reviewers: you MUST run the three-condition ADR gate (see references/adr-format.md) and offer to record an ADR. User may decline.

If a prerequisite skill is unavailable (not installed), continue with fallback — but NEVER skip because you judged it unnecessary.

Prerequisites (invoke before proceeding)

Superpower	When	Priority
using-git-worktrees	Before first file write	MUST
writing-plans	When creating tasks	MUST

If a superpower is unavailable (skill not installed), skip and continue.

Rationalization Prevention

Thought	Reality
"I don't need a worktree, design already committed the artifacts"	Design may not have run, or the worktree may not exist yet. using-git-worktrees is idempotent — if already isolated, it detects and continues.
"This change is simple enough to write tasks inline"	Simple changes finish writing-plans quickly. Complex changes need it most. There is no middle ground where skipping helps.
"I already understand the scope from the proposal/gherkin"	Understanding scope ≠ properly decomposed tasks. writing-plans catches scope gaps you haven't noticed.
"The user wants speed, invoking superpowers will slow us down"	Skipping prerequisites produces lower-quality tasks that cause rework during apply.
"The spec artifacts are clear enough, review is overkill"	Review catches blind spots that the spec author can't see. The more obvious the spec seems, the more likely assumptions are hiding.
"I'll skip review for this small change"	Small changes still benefit from a test coverage check. Review scales with complexity — it's fast for simple changes.
"The review rejected option X — let's just note it in tasks.md"	If the rejection reason is load-bearing for future reviewers, it'll be re-litigated. Run the ADR gate; if all three conditions hold, write the ADR.

Red Flags — STOP if you catch yourself:

Writing any file before invoking using-git-worktrees
Writing - [ ] task checkboxes without having invoked writing-plans
Creating tasks without reading spec artifacts first
Thinking "review isn't needed for this particular change"
Skipping a MUST prerequisite and planning to "compensate" later
Proceeding without at least one spec artifact (gherkin or proposal) being done
Merging a review rejection into tasks.md without checking whether it qualifies as an ADR

Process Flow

digraph plan {
    "Select change" [shape=box];
    "Invoke using-git-worktrees" [shape=box, style=bold];
    "Read spec artifacts" [shape=box];
    "Check readiness" [shape=diamond];
    "STOP: need spec first" [shape=box, style=dashed];
    "Assess complexity" [shape=box];
    "Suggest review roles" [shape=box];
    "User confirms roles" [shape=box];
    "Invoke writing-plans" [shape=box, style=bold];
    "Generate initial tasks.md" [shape=box];
    "Role count?" [shape=diamond];
    "Single review agent\n(all roles)" [shape=box, style=bold];
    "Parallel review agents\n(1 per role)" [shape=box, style=bold];
    "Merge findings +\nupdate tasks.md" [shape=box];
    "Advance to implement" [shape=box];
    "Show summary" [shape=doublecircle];

    "Select change" -> "Invoke using-git-worktrees";
    "Invoke using-git-worktrees" -> "Read spec artifacts";
    "Read spec artifacts" -> "Check readiness";
    "Check readiness" -> "STOP: need spec first" [label="no spec done"];
    "Check readiness" -> "Assess complexity" [label="spec ready"];
    "Assess complexity" -> "Suggest review roles";
    "Suggest review roles" -> "User confirms roles";
    "User confirms roles" -> "Invoke writing-plans";
    "Invoke writing-plans" -> "Generate initial tasks.md";
    "Generate initial tasks.md" -> "Role count?";
    "Role count?" -> "Single review agent\n(all roles)" [label="1-2 roles"];
    "Role count?" -> "Parallel review agents\n(1 per role)" [label="3+ roles"];
    "Single review agent\n(all roles)" -> "Merge findings +\nupdate tasks.md";
    "Parallel review agents\n(1 per role)" -> "Merge findings +\nupdate tasks.md";
    "Merge findings +\nupdate tasks.md" -> "Commit tasks";
    "Commit tasks" [shape=box];
    "Commit tasks" -> "Advance to implement";
    "Advance to implement" -> "Show summary";
}

Input: Optionally specify a change name. If omitted, infer from context or prompt.

Steps

Select the change

If no name provided:
- Look for beat/changes/ directories (excluding archive/)
- If only one exists, use it (announce: "Using change: ")
- If multiple exist, use AskUserQuestion tool to let user select
Ensure worktree isolation

Invoke using-git-worktrees before reading or writing any files. If already in a worktree (e.g., from design), it detects and continues.
Read spec artifacts and verify readiness

Read status.yaml (schema: references/status-schema.md).

Check that either:
- gherkin has status: done → Gherkin-driven
- gherkin has status: skipped AND proposal has status: done → Proposal-driven
If neither condition is met: "Spec artifacts are required before task breakdown. Run /beat:design first." STOP.

If status.yaml has source: distill: warn — "This is a distill change; it describes current behavior, so there is nothing to plan. The intended flow is /beat:verify → /beat:archive." Use AskUserQuestion tool to confirm before proceeding.

If tasks already has status: done: "Tasks already exist. Re-running will regenerate tasks.md." Confirm with user before proceeding.

Read all available artifacts:
- proposal.md (if exists)
- features/*.feature (all files, if gherkin is done)
- design.md (if exists)
Read beat/config.yaml if it exists (schema: references/config-schema.md). Use language for output language, inject context, and apply rules.tasks as additional constraints.

Assess change complexity and suggest review roles

Evaluate complexity based on:

Number of feature files and scenarios
Number of components/services mentioned in design.md
Whether @e2e scenarios exist (implies integration surface)
Whether design.md mentions external dependencies, DB changes, or API changes

Suggest review roles based on complexity:

Use AskUserQuestion tool:

"Based on the spec artifacts, I suggest the following review perspectives: [dynamically selected roles with rationale]

Adjust, add, remove, or confirm?"

Role selection guidance:

Signal	Suggested role
Always included	Test coverage: Are all scenarios covered? Any gaps?
`@e2e` scenarios present	Integration: Are integration boundaries identified?
design.md mentions API/DB changes	Architecture: Is the design consistent with existing patterns?
proposal.md mentions user-facing changes	User experience: Does the plan match user expectations?
design.md mentions auth/data/external APIs	Security: Are there security considerations?
High scenario count (>5) or multiple features	Scope: Is the decomposition granular enough?

Test coverage is always included. Other roles are suggested dynamically. The user can add custom roles (e.g., "performance", "accessibility") or remove suggested ones.

Generate initial tasks via writing-plans

Invoke superpowers:writing-plans. Pass the completed artifacts (proposal, gherkin, design) as context.

The output of writing-plans becomes the initial tasks.md — do NOT generate tasks.md yourself.

If writing-plans is unavailable (not installed), create tasks.md as fallback with notice: 

Task Decomposition Principles — if writing-plans output violates any principle, decompose further before saving tasks.md:
- Single concern: one component, service, or API endpoint per task. "Build X and integrate into Y" = two tasks.
- ~200 LOC cap: each task produces ~200 lines of new code (excluding tests). More = too many responsibilities.
- 2-3 files max: each task touches at most 2-3 source files. More = crossing concern boundaries.
- Independently verifiable: can run tests after completing without depending on later tasks.
- "And then" test: if a task description needs "and then", split it.
- Exception: project initialization/scaffolding tasks may exceed file limits while maintaining single concern.
Quality Principles header — insert the following block between the tasks.md header and the first ### Task:
```
## Quality Principles

**Testing:** Tests verify behavior (return values, state changes, responses), not wiring.
If the main assertion is `toHaveBeenCalledWith`, rewrite to assert on the function's output.

**Code:** No single new file exceeds ~300 lines. If it grows past that, split into focused sub-modules.
```
Save the initial tasks.md to beat/changes/<name>/tasks.md.
Dispatch review agents

Read review-subagent-prompt.md for the subagent prompt template.

Dispatch strategy based on confirmed role count:
- 1–2 roles: Single Agent (subagent_type: Explore) with all confirmed roles. Build one prompt containing all roles and their focus areas.
- 3+ roles: One Agent (subagent_type: Explore) per role, dispatched in parallel. Each agent receives ONLY its own role and focus area — no knowledge of other roles.
Every agent receives:
- All spec artifacts (proposal, gherkin, design)
- The initial tasks.md
Do NOT pass conversation history or session context to any agent.

Why parallel at 3+: A single agent reviewing from many perspectives simultaneously loses depth and independence — findings from one role bias another. Independent agents give genuine blind-spot coverage. At 1–2 roles the overhead isn't worth the split.

Fallback: If any agent fails or returns empty, proceed with findings from the others. If ALL fail, use initial tasks.md as-is. Show notice: "Review could not be completed — tasks.md was not reviewed. Consider re-running /beat:plan."
Merge findings and update tasks.md

Collect findings from all review agents. If parallel agents were used:
- Deduplicate findings that identify the same issue from different roles
- When findings conflict, prefer the more conservative recommendation
ADR gate on rejected alternatives — scan the review output for cases where an alternative approach was considered and rejected with a load-bearing reason (i.e. a reason a future reviewer would want to know about to avoid re-suggesting the same thing). For each, run the three conditions from references/adr-format.md:
1. Hard to reverse?
2. Surprising without context?
3. Result of a real trade-off?
If all three hold, use AskUserQuestion tool: "Review rejected '' because '' — record as ADR?" On Yes, write the ADR under docs/adr/, increment numbering, cross-reference from tasks.md or design.md as appropriate. On No, continue.

Read beat/changes/<name>/tasks.md, then use the Edit tool to apply:
- Add missing tasks or steps identified by the review
- Split tasks that the review flagged as too broad
- Add test coverage notes where the review found gaps
- Reorder tasks if the review identified dependency issues
Show the user a brief summary of what changed:
```
## Review Applied

- [Role]: <what was changed>
- [Role]: <what was changed>
...
```
Update status.yaml: set tasks to { status: done } and phase to tasks.
Commit and advance phase

Commit tasks.md and updated status.yaml: git add beat/changes/<name>/ && git commit

Use a descriptive message, e.g. "plan(): add task breakdown".

Update phase to implement in status.yaml (advancing from tasks → implement).
```
## Plan Complete: <change-name>

Tasks: N tasks in tasks.md
Review: [list of roles that reviewed]
Changes from review: [count of modifications]

Ready for implementation! Run `/beat:apply` to start.
```

Guardrails

NEVER proceed without at least one spec artifact (gherkin or proposal) being done
NEVER write tasks inline — always use writing-plans (or fallback with notice)
Review is part of the process, not optional — but depth scales with complexity
Test coverage review is always included regardless of complexity
Apply review findings directly to tasks.md, not as a separate report
If review reveals spec-level issues (missing scenarios, design gaps), surface them to the user rather than silently compensating in tasks

plan

About

Rationalization Prevention

Red Flags — STOP if you catch yourself:

Process Flow

Use it

Manifest

Reviews