Controlflow Verify

ControlFlow Verify

Overview

Verify a plan before execution. Runs entirely inline in the main conversation context — no plugin subagents are spawned. Because inline review lacks the isolation of a fresh subagent context, this skill is adversarial by construction: it tries to refute the plan and defaults to a flagged finding when uncertain. The goal is to catch mirages and unexecutable plans cheaply, without the token cost of spawning verifier subagents.

Invoke this skill via /controlflow-claude-code:controlflow-verify.

Input

The plan artifact path (default plans/<task-slug>-plan.md). Read it from disk; do not work from a chat-embedded copy.

Tier gating (advisory)

Any unresolved HIGH-impact semantic risk → run all three regardless of tier.

Adversarial Framing (apply to every phase)

• Your job is to break the plan, not to defend it. Steelman the rejection.
• Default to flagged when evidence is insufficient — do not rationalize a pass.
• For each claim, ask: "What would make this false?" then check that.
• Distinguish validated blockers from hypotheses; state validation gaps explicitly.
• See references/adversarial-framing.md.

Phase 1 — Structural Audit

Confirm the artifact conforms to schemas/planner.plan.schema.json and plans/templates/plan-document-template.md:

1. YAML header present; Status is one of READY_FOR_EXECUTION, ABSTAIN, REPLAN_REQUIRED; Agent: Planner; Schema Version: 1.2.0; Confidence is numeric.
2. All 10 sections present in order; 5 lifecycle sections present and ordered for SMALL+.
3. Section 7 has exactly seven risk categories, each once.
4. Every phase declares one executor_agent from the schema enum; quality gates use only the five standard values.
5. Acceptance criteria include at least one measurable observable outcome per phase.
6. LARGE tier includes flowchart TD + sequenceDiagram; each ≤30 lines.

Structural failure → NEEDS_REVISION immediately.

Phase 2 — Assumption / Mirage Check

Try to refute the plan's factual claims:

1. Every referenced file/path/symbol is real — open or grep for it. A referenced file that does not exist is a mirage and a blocker.
2. Every assumption is bounded in scope, not a hidden scope decision.
3. Dependencies and version constraints are pinned or explicitly flagged.
4. No "should be safe" hand-waving on concurrency or shared mutable state — ownership and ordering are explicit.
5. Data-volume concerns documented where applicable (bulk ops, pagination).

See references/mirage-patterns.md for the full mirage taxonomy (P1–P10 presence mirages, A11–A17 absence mirages) and references/verify-phases.md for the detailed phase checklists.

Phase 3 — Executability Cold-Start Simulation

Simulate a fresh executor starting Phase 1 with only the plan in hand:

1. Can Phase 1 execute without asking the user a question? If yes → fine; if no → flag the ambiguity as a Phase 1 blocker.
2. Are verification commands concrete enough to run as-is (no guessing)?
3. Does each destructive or migration-heavy phase have rollback/recovery guidance? HIGH blast radius → require human_approved_if_required; MEDIUM → safety_clear.
4. Is the inter-phase contract deliverable format explicit, and does the downstream phase know how to validate it?

Confidence Score and Verdict

Score each applicable checklist item confirmed / uncertain / refuted.

confidence = confirmed_count / total_items_with_any_actionable_question

• uncertain ≥ 2 → cap confidence at 0.85.
• Any HIGH-impact open question → cap at 0.7.
• All checks pass, Phase 1 actionable, criteria measurable → APPROVED.
• Ambiguous Phase 1, no rollback on destructive change, unverified paths, vague criteria → NEEDS_REVISION (list each finding with the exact section reference; re-audit after fix).
• Structural flaw; scope not deliverable as authored → REJECTED (explain blockers, ask the user for direction; do not start coding).

Write a compact verdict to plans/artifacts/<task-slug>/verify-verdict.md for auditability. Present the verdict and the findings that justify it to the user before implementation.

Verify-Specific Failure Checks

• Do not pass a plan you have not read from disk.
• Do not mark a finding resolved without re-checking the evidence.
• Do not let the planner's confidence value substitute for your own scoring.
• Do not collapse the three phases into a single skim for a "small" plan — run the phase(s) the tier requires.

References

• references/adversarial-framing.md
• references/verify-phases.md
• references/mirage-patterns.md