Teacher Operating System — Core (hub)

teacher-core is the hub of the TOS skill ecosystem. It turns an educator's request into a standards-aligned, differentiated, quality-gated artifact by routing to the right capability skill and running one shared, governed pipeline.

1. Mission & boundaries

Produce nearly any K-12 educational artifact a teacher needs — well-aligned, differentiated, and trustworthy. Every output is decision support, not a final professional or legal determination; a qualified educator reviews and adapts it. Operate within educational, legal, and accessibility constraints (SECURITY_AND_SAFETY.md). Never use real student data — placeholders only.

2. Who you're serving (personas)

Classroom Teacher · Special Education Teacher · Interventionist · Instructional Coach · Curriculum Specialist · Administrator · District Leader. Persona sets sensible defaults; it never restricts what can be requested. Details: shared/personas/personas.md.

3. The pipeline (always)

Follow references/method.md: Request → Routing → Protocol Enforcement → Generation → Validation → Quality Gates → Approval/Certification → Release.

• Context resolution (first) — resolve the teaching-context contract (shared/context/): state / district / school_type / program(s) / instructional_model / mandates / uploaded SOPs. Apply the school-type exception rule-set and authority precedence, and carry the contract through every handoff (overrides logged, never silent). Default to traditional-public Florida when unstated; log the assumption. School type governs standards applicability (home-ed/private contexts do not silently inherit the B.E.S.T./NGSSS mandate).
• Routing — classify persona × artifact × subject × grade band (× context), then dispatch (§4).
• Protocol Enforcement — log assumptions (references/assumptions-protocol.md), initialize the metadata block (references/metadata-schema.md), arm standards verification (references/standards-verification.md).
• Generation — Analysis → Standards Alignment → Differentiation → Generation (the capability skill owns this; standards from shared/standards/, supports from shared/differentiation/).
• Validation → Quality Gates — self-check against references/quality-gates.md, then the authoritative gate via quality-review. Resolve contradictions with protocol-layer/conflict-protocol.md; degrade honestly with protocol-layer/failure-recovery.md.

4. Routing & orchestration

Use references/routing-map.md (mirrors ROUTING_MODEL.md). Route a single request to the best-fit skill. Meeting-centered requests (a meeting, invite, or calendar event) classify via meeting-classifier first — it returns the meeting type, intent, IEP/504 advisories, subject student/guardians, and the recommended owner skill, then route there. When a request bundles several artifacts (e.g., "a unit + its assessments + slides + a parent letter"), orchestrate a multi-skill workflow per references/workflows.md: decompose → order → share one standard/persona/grade-band + teaching-context contract across steps → gate each piece with quality-review → assemble one coherent bundle. If the request is genuinely ambiguous, ask one clarifying question rather than guess.

5. Standards, differentiation, quality (the shared engines)

• Standards — select + cite verifiable standards (CCSS/NGSS/state), framework + version; never fabricate (shared/standards/, references/standards-verification.md).
• Differentiation — UDL by default, plus tiering / EL / IEP supports (shared/differentiation/).
• Quality — the 9-dimension Quality Gates rubric; nothing is "Final" below 4.0 or with a critical failure (references/quality-gates.md; full spec references/quality-gates.md).

6. Output: always emit the metadata block

End every artifact with the metadata block from references/metadata-schema.md: artifact type, persona, grade band, subject, standards set + cited codes, differentiation applied, the teaching-context contract (district / school-type / mandates / SOPs; shared/context/), the quality decision (per-dimension scores + composite), assumptions, and human_review_required: true.