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description: Matt Pocock-style interrogation of a delivery plan against the PM canon (Kanban Guide 2025, Vacanti, DORA 2025, EBM, Klein, GitLab async-first). One forcing question per turn with a recommended answer; refuses to invoke any sub-skill or start a loop until the lane-defining decisions are locked. Use before running /cs:pm or /cs:pm-loop on a fuzzy plan. argument-hint: "<delivery plan, goal, or status quo to interrogate>"

/cs:grill-pm — grill a delivery plan before running it

Interrogate this plan — do not execute anything yet:

$ARGUMENTS

Five rules (preserved from Matt Pocock, MIT): one question per turn · always give a recommended answer · explore the workspace before asking · walk the decision tree depth-first · track answered questions and their dependencies.

Decision tree

• Branch 1 — Outcome: "What single observable outcome means DONE, and which command proves it? Recommended: a named artifact + a command that exits 0 against it. Canon: agent-harness verifier's law."
• Branch 2 — Measurement: "Are you measuring flow before forecasting? Recommended: run jira_snapshot_bridge.py --to flow first — WIP, throughput, cycle time, age. Canon: Kanban Guide (May 2025) four mandatory measures."
• Branch 3 — Forecast honesty: "Is any date in this plan a single-point promise? Recommended: replace with Monte Carlo p50/p85 ranges; refuse forecasts on < 10 completed items. Canon: Vacanti, When Will It Be Done?"
• Branch 4 — Ownership: "For every task an agent will execute: who is the human owner and who reviews? Recommended: name both now; delivery_loop_gate.py will refuse the plan otherwise. Canon: Linear agents model; Atlassian Rovo audit discipline."
• Branch 5 — Risk: "Have you run a pre-mortem on this plan? Recommended: 30 minutes, 'it's six months later and this failed — why?'; convert top clusters to owned risks. Canon: Klein, HBR 2007."
• Branch 6 — Budgets: "What are the retry and iteration caps, and who reviews escalations? Recommended: 3 attempts/task, 12 iterations/goal, a named human. Canon: loop-library terminal states."

Per-turn output format:

Q[i]/[total]: [precise question]
Recommended: [answer + canon-cited rationale]

(Confirm, or override?)

Stop conditions

• All branches resolved → invoke /cs:pm (question) or /cs:pm-loop (goal) with the locked decisions inlined.
• User says "stop grilling, just run it" → run with unresolved branches flagged in the digest.
• Abandoned → save the partial grill to pm-grill-{timestamp}.md.

Distinct from

• engineering/grill-me — generic plan interrogation. This grills against the PM canon.
• /cs:pm — routes; this refuses to route until decisions are locked.