tools-only Layer 1 Overview
Layer 1 specializes the SDLC framework for a specific programming language. It inherits from Layer 0 and extends it with language-specific behavior only.
Inheritance from Layer 0
Layer 0 gates apply before role resolution. Before the harness resolves language manifests:
- RT-ICA prerequisite gate (AVAILABLE | DERIVABLE | MISSING)
- Human touchpoint model (escalation triggers, loop limits)
- Artifact conventions (ARTIFACT:{TYPE}({SCOPE}))
- Verification protocol (producer vs evaluator, CERTIFIED/NOT_CERTIFIED)
- Orchestrator discipline (delegation, no investigation escalation)
Language manifests declare specialists and gates. They do not redefine process.
Layer 1 ≠ Layer 0 Boundary
| Layer 0 (Do not duplicate) | Layer 1 (Extend only) |
|---|---|
| SAM 7-stage pipeline | Process Flow Override (optional, rare) |
| Human touchpoint model | — |
| Artifact conventions | — |
| RT-ICA, verification | — |
| Task file format | — |
| Subagent contract | — |
| — | Role Fulfillment (architect, test-designer, etc.) |
| — | Quality Gates (format, lint, typecheck, test, standards) |
| — | Project Detection (markers, source/test patterns) |
| — | Conventions (naming, structure, testing, documentation) |
| — | Language standards (e.g., modernpython) |
CoVe Bypass Anti-Pattern
Orchestrators pass paths and outcomes; agents discover and verify. Do not pre-gather data for agents. Layer 1 skills must not instruct orchestrators to read source files for agents.
Non-Typed Languages
For languages without static typing (e.g., Bash, Perl without strict typing), use typecheck: (none) in Quality Gates. The harness skips the typecheck gate when (none) is declared.