Arch Step Goal Prompt

ArcStep Goal Prompt

Use this skill when the user wants a high-quality goal prompt file for an ArcStep run.

The job is to turn a rough ask and any canonical ArcStep plan path into a durable Markdown goal prompt. The prompt should make the future goal-mode agent better at staying aligned while it works: rereading the controlling plan, using the real ArcStep command, noticing common false-finish patterns, going deeper when the work is only name-complete or status-complete, and using reviewers only when they are requested or already required.

When to use

• The user wants a goal prompt for $arch-step auto-plan, implement-loop, auto-implement, or full-auto.
• The user has a canonical ArcStep plan doc and wants a stronger goal-mode prompt to drive or resume the run.
• The user wants alignment reminders, reviewer handling, or completion language encoded into the goal prompt.
• The user wants the goal prompt saved or returned as Markdown rather than compressed into a paste-sized /goal string.
• The user is correcting a pattern where agents stop after surface-level completion, stale plan reads, name-only work, status-only work, unfinished requested reviews, or copied plan content.

When not to use

• The user wants ArcStep work executed now. Use $arch-step.
• The user wants a generic prompt unrelated to ArcStep. Use $prompt-authoring.
• The user wants a new or edited skill package. Use $skill-authoring.
• The user wants a harness, launcher, controller, script, or deterministic runner around ArcStep.

Non-negotiables

• Keep the ArcStep plan doc as the planning source of truth. The goal prompt is an execution brief, not a second plan.
• Point to the plan's Scope and Simplicity Contract and approval anchor without copying them. The goal prompt, its reviewer language, and later goal edits cannot authorize scope.
• Do not copy plan phases, checklists, implementation details, examples, reviewer prompts, or long doctrine from linked files into the goal prompt.
• Reference source truth by path, skill name, command, or artifact role.
• Use $prompt-authoring doctrine for prompt quality, especially the Codex goal prompt reference.
• Use $arch-step doctrine for ArcStep command behavior. Do not re-invent its workflow, receipt rules, implementation frontier, or audit standard.
• When a generated prompt creates, resumes, replaces, or coordinates another agent, apply ../_shared/agent-orchestration-policy.md. At the smallest handoff point, make the role, native or external transport, clean/bounded/full starting context, exact resume or fresh replacement, isolation and capabilities, parent/child topology, and return evidence clear. These are reasoning decisions, not a mandatory form to paste into every goal.
• Default independent reviewers and mappers to new clean same-host native children when the host can do the job. Make them read-only by capability when available, also say no edit/no write, let each child use its own native sub-agents while forbidding it to start external agents, and require the parent to check current repo state before accepting the result. Resume the exact implementer for its authorized repairs; start the next independent recheck as a fresh clean child.
• Keep generic goal semantics free of provider CLI syntax. When an external lane is selected, say what concrete provider, exact-model/profile, lifecycle, isolation, automation, or receipt benefit it provides and weigh that against its extra process and integration cost.
• Make false finish lines explicit without turning them into a giant checklist: marker-only planning, stale plan reads, docs-only completion, name-only completion, status-only completion, copied source truth, pending requested reviewers, and unhandled required repairs.
• Include these when applicable: an agent-authored plan revision or reviewer finding was treated as human scope authority; the goal kept "repairing" review findings until implementation exceeded the approved initial scope.
• Treat reviewer rejection as repair input only when the finding is directly authorized or already in the approved convergence closure. New scope needs a human decision; out-of-scope findings stay observations; unauthorized built scope is subtraction work. The goal prompt should not add reviewers by default.
• Do not add domain-specific proof requirements, heavyweight proof rituals, or harness-style process unless the controlling plan already requires them.
• Never add scripts, wrappers, formal parameter schemas, launchers, controllers, or harnesses. This skill writes prompt guidance only.

First move

1. Read references/arcstep-goal-prompt-contract.md.
2. Apply $prompt-authoring guidance for Codex goal prompts or persistent goal objectives.
3. If the requested goal will dispatch another agent, read ../_shared/agent-orchestration-policy.md before drafting its handoff.
4. Identify the run type from the user's language:
   • planning: auto-plan
   • implementation: implement-loop or auto-implement
   • mixed continuation: full-auto
   • unknown: write the prompt so the future agent resolves the next ArcStep command from the canonical doc instead of guessing
5. Identify the controlling source truth:
   • the user-supplied DOC_PATH, if present
   • the current canonical ArcStep doc, if the user clearly points at one
   • any user-named audit log, worklog, reviewer output, or history summary
6. If a required source path is missing and cannot be inferred from context, produce a prompt skeleton that names the missing slot plainly instead of inventing hidden source truth.

Workflow

1. Name the desired world state in one sentence.
2. List controlling sources by path or exact artifact name, with short role labels only.
3. State which ArcStep command the future agent should run, or how it should resolve the command from the canonical doc.
4. Add a light alignment loop: reread source truth, compare work to intent, check the most likely false finish line, then go deeper before closing.
5. Add reviewer, auditor, or worker handling only when the user asked for it, the plan already requires it, or the goal is explicitly repairing failed self-certification. Put the dispatch choices in that role's handoff rather than spreading generic orchestration prose across the goal.
6. Define done as a lean completion line: final source reread, current ArcStep frontier satisfied, required repairs handled, no requested reviewer or worker still pending, and a final report tied to source truth.
7. Keep compressing until the prompt points to source truth instead of restating it.

Output expectations

Return or create a Markdown goal prompt file. If the user gave a DOC_PATH and did not give an output path, default to a sidecar file beside the plan named <PLAN_STEM>_GOAL_PROMPT.md.

The file should contain the goal prompt itself, not a separate essay about how it was written. Use headings only when they make the prompt easier for a future agent to follow.

When returning the result in chat, include the output path and a short note about any unresolved source path or assumption.

Reference map

• references/arcstep-goal-prompt-contract.md - prompt shape, source-truth compression, ArcStep run types, reviewer gates, and completion traps.
• ../_shared/agent-orchestration-policy.md - transport, context, continuation, isolation, topology, and return-evidence semantics for any generated agent or reviewer handoff.