RPI

Run one experiment from the caller's existing intent source through three responsibilities and stop:

anti-ceremony guard -> Plan -> Implement -> fresh Validate -> report

On CONTINUE, the core path remains Plan -> Implement -> fresh Validate -> report. RPI invokes the guard exactly once before Plan. It preserves the original intent and dispatches each core phase at most once. It does not own retries, budgets, queues, claims, leases, Git, delivery, release, closure, or the caller's next decision.

The pure scripts/run_once.py reference behavior makes the dispatch and stop semantics executable without Git, ao, or a tracker.

Admission and phase lock

RPI activates for any request shaped as plan-execute-verify work — orchestration, worker delegation, "execute this plan", or an explicit Plan -> Implement -> Validate ask — whenever the goal includes changing the subject. The caller does not have to name RPI. Research-, audit-, and review-only delegation is not RPI admission: it produces evidence for a caller, has no implementation candidate, and never earns a verdict.

Once the caller has accepted a plan — including a duel or design synthesis — Plan is closed for that intent. Every subsequent lane must return implementation evidence: diffs, commits, test results, or factual receipts. Dispatching another planning, audit, or review lane over the same intent requires new explicit caller authorization; a review comment is never that authorization by itself.

Contract

1. Invoke anti-ceremony's artifact-free quick guard once with the caller outcome, proposed process work, remaining proof, and stop condition. On STOP, dispatch no core phase, report NOT_PLANNED with the guard's one-sentence reason, and stop. On CONTINUE, proceed without adding an artifact, retry, repair, delivery, tracker, or Git action.
2. Resolve the existing bead or caller intent. Invoke Plan once only if that source needs shaping; Plan updates the same source or proposes an amendment. It creates no AgentOps packet. Preserve a durable caller-owned source by reference and digest; only when no durable source exists does the runtime snapshot the exact resolved source bytes under their digest before dispatching Implement or a fresh Validate context. If usable intent cannot be established, report NOT_PLANNED and stop.
3. Invoke Implement once with the resolved intent. It performs one bounded experiment; the runtime derives subject identity and check receipts. If no subject is built, report NOT_BUILT and stop.
4. Invoke Validate once in a context distinct from the author's context. Pass the intent reference and digest, exact subject manifest, factual receipts, validator identity, and freshness attestation.
5. Return the fresh validation result and a short report. Persist and link verdict.v2 only when the caller requests machine-readable evidence or a declared downstream consumer requires it. Stop regardless of PASS, FAIL, or NOT_PROVEN.

NOT_PLANNED and NOT_BUILT are report statuses, never semantic verdicts. A caller may revise the bead or caller intent and start a new invocation. RPI never creates a parallel revision artifact or selects the next work itself.

Anti-ceremony boundary

The hard anti-ceremony dependency owns the quick guard and its explicit-only full honesty audit. RPI does not duplicate that judgment or turn each component, gate failure, or specialist comment into a new planning artifact. A terminal caller goal may remain one bounded experiment across several source owners when they serve one outcome and one acceptance boundary.

If control artifacts or fresh-validation cycles are multiplying faster than implementation evidence, stop dispatching more lanes. Return to one outcome-level intent and continue with targeted deterministic checks, reserving the full integration check and fresh validation for the frozen subject. This changes orchestration cost, never acceptance, exact identity, fail-closed scope, or validation authority.

Spiral breaker

The spiral breaker fires when two consecutive control artifacts (plans, audits, reviews, prompts, reports) contain no new implementation evidence. Terminate the run and report NOT_BUILT when no implementation subject exists; when a subject exists, stop and report its current status without dispatching another lane or repair revision. RPI owns no lane budget, repair budget, or retry policy.

Delegation boundaries

Delegate with minimal context: a lane receives the frozen intent reference and the established facts it needs, never the orchestrator's full conversation history. If a lane cannot proceed from the intent alone, report that the plan failed the fresh-context test and stop; do not pad it with chat transcript or start another planning lane without explicit caller authorization.

Lanes whose write scopes share a regen surface (the same generated outputs, mirrors, or manifests) serialize; only lanes with disjoint source scopes and disjoint regen surfaces may run in parallel.

Invariants

• Acceptance and its runtime-derived digest do not change between phases.
• The anti-ceremony guard runs once before Plan; STOP dispatches none of Plan, Implement, or Validate, while CONTINUE preserves their order.
• The runtime derives complete changed-path coverage or Validate returns NOT_PROVEN.
• A proven change outside write_scope makes the verdict FAIL.
• PASS requires nonempty distinct author and validator context IDs plus an explicit freshness attestation.
• Optional Premortem, Postmortem, Council, genie, factory, tracker, and runtime adapters are caller-selected. They do not alter phase order or core outcomes. When a factory adapter is selected, work enters it through that factory's coordinator (for Gas City, the Mayor — see using-gc); RPI hands over intent and never dispatches factory runs itself.
• Learn is an optional later consumer of verdict collections and is not part of this invocation.

Report

RPI has one required report surface and one optional representation:

1. Interactive response: return the result to the caller in natural language. This is the default assistant response.

2. Machine artifact: return or persist the exact rpi-report.v1 object only when the caller requests machine-readable evidence or a declared adapter consumes it. The schema ships in a repo checkout at schemas/rpi-report.v1.schema.json; the minimal required shape is:

   {
     "schema_version": "rpi-report.v1",
     "status": "PASS",
     "intent_ref": "<durable-source-ref-or-fallback-snapshot-ref>",
     "acceptance_digest": "<64-hex-char-sha256-or-null>",
     "subject_manifest_digest": "<64-hex-char-sha256-or-null>",
     "verdict_ref": "<verdict-location-or-null>",
     "verdict_digest": "<64-hex-char-sha256-or-null>",
     "checked": ["<criterion satisfied by evidence>"],
     "not_checked": ["<criterion not covered>"]
   }
   

   intent_ref remains required: it names the durable caller-owned source when one exists, otherwise the content-addressed fallback snapshot. status is one of PASS | FAIL | NOT_PROVEN | NOT_PLANNED | NOT_BUILT; the three digest fields, when present, are 64-character lowercase hex SHA-256 strings; checked and not_checked are arrays of strings. All nine keys are required (use null for an inapplicable ref or digest), and no additional properties are allowed.

Lead the interactive response with the status and one sentence stating the caller-visible outcome. Lead with the subject, not the process: production paths changed, commits, test results, and acceptance criteria satisfied or remaining. A rising artifact count over an unchanged subject is a stop signal, not progress. Follow with only the strongest proof, any material unchecked scope, and a clickable verdict reference when one exists. Name why no subject exists for NOT_PLANNED or NOT_BUILT; for a guard STOP, use its one-sentence reason. Keep the response to one short paragraph or at most four bullets.

When no machine artifact was requested, do not create a hidden one. Raw digests, schema fields, and exhaustive check lists stay out of the interactive response unless an integrity failure makes one necessary to explain the result.

Do not append a next action. The caller owns continuation.