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stack/docs/concepts/system-prompt.md
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jason.woltje 193479b52d docs: concept annexation, provider/reference docs, ACT-1 groundwork
Mosaic concepts pages now own the adapted content; source/license
metadata under docs/reference/concepts. Adds ACT-1 agent-context
planning capture, pinned concept test package + preparation utility,
foundation observation notes (durability, evidence, federation,
onboarding, workflow), and the #1495 consolidation assessment.
TOOLS.md updated for the host-dev launcher.
2026-09-07 14:07:05 -05:00

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Prompt composition

Status: target responsibilities agreed; unified resolution remains planned. The existing demo's launch and verification contracts remain in force.

Mosaic composes instructions from sources with distinct ownership and lifetimes. The composition contract must be explicit and testable across supported harnesses.

Source Responsibility
CONSTITUTION Shared boundaries, principles and authority
STANDARDS Quality expectations and evidence requirements
Agent SOUL Voice, temperament and interaction style
Repository AGENTS Applicable repository procedures
Scoped USER context Relevant, authorized user preferences
Runtime context Actual identity, workspace, tools, skills and session behavior
Assignment records Authorized work, current state and acceptance criteria

Resolution rules

Select one canonical SOUL belonging to the requested agent. A project folder, template, root SOUL, or shared boilerplate must not replace it implicitly. System bootstrap creates the initial agent's instance from a reviewed template; later agent bootstrap follows the same ownership rule. Templates are not runtime personality layers. Updating them must not silently overwrite existing instances.

Load repository procedures only where applicable to the execution's scope. Do not automatically give a worker the conductor's context or privileges. User preferences, agent style, and retrieved content cannot widen permission. Heading order in a concatenated Markdown file is not security enforcement.

Execution lifetime and provenance

Resolve current approved input revisions on Resume and Fresh. Record their identity with the execution, and preserve the exact injected snapshot where required. Keep credentials out of ordinary prompt records. Permission enforcement belongs to the runtime and policy mechanisms, not the personality file.

A harness may contribute its own instructions. Distinguish Mosaic's assembled inputs from a verified model-bound request; a local prompt snapshot alone cannot establish what an external harness added.

Current implementation boundary

The container replaces Pi's base prompt with generated context; native development appends context to Pi's coding prompt. They differ in source selection and policy enforcement. Reconcile those paths under ACT-1 after demo validation. Do not remove POC startup-marker behavior before replacement verification fixtures are tested.

See context inspection, runtime ownership, and the migration plan.