common-software-requirements

name	common-software-requirements
description	Standardize SRS and FRS specifications for technical behavior, interfaces, data contracts, quality constraints, and verification mapping. Use when writing SRS, functional specification, system behavior requirements, API/data contracts, or non-functional thresholds.
metadata	{"triggers":{"files":["SRS.md","docs/srs/srs-*.md","specs/*.md"],"keywords":["create srs","software requirements","functional specification","system behavior spec","technical requirements","non-functional requirements"]}}

Software Requirements Expert

Priority: P0 (CRITICAL)

Define the technical "How" with verifiable requirements.

1. SRS/FRS Discovery

• Confirm linked PRD requirements (REQ-*) and AC IDs.
• Preserve trace: BRD-OBJ-* -> REQ-* -> AC-* -> SRS-* -> test evidence.
• Block or route back to PRD (plan-feature) when REQ-* or AC-* inputs are missing; do not infer product scope from code.
• Define functional flows: trigger, inputs, validations, outputs, errors.
• For complex flows, use one actor, one goal, one session; split normal, alternate, and exception courses.
• Define interface contracts: API, events, storage, external integrations.
• Define NFR thresholds: latency, availability, security, scalability.
• Define constraints: migration, compatibility, compliance, rollout.

2. Drafting Workflow

• Load references/srs-template.md.
• Slug Alignment: Use the same [slug] from the source docs/prd/prd-[slug].md to maintain filename-level traceability.
• Write one requirement card per statement with stable SRS-* IDs.
• Map each SRS-* to source PRD REQ-* and verification lane.
• Map every technical behavior to PRD ACs, test lane, and evidence target.
• Include statement, priority, status, input/output/error behavior, NFR impact, measurement method, and evidence target.
• Add outcome report: feature_status, requirement trace, completed/missing evidence, decision needed, and recommended next workflow.
• Write to docs/srs/srs-[slug].md.

3. Verification Mapping

• Each SRS-* has test evidence plan (unit/integration/E2E/manual).
• Failure modes and fallback behavior are explicit.
• Permissions and privacy controls mapped to requirements.
• Measurement method exists for each NFR.

Anti-Patterns

• No mixed requirements and implementation tasks in same statement.
• No NFR claims without numeric threshold.
• No interface contract without input/output/error schema.
• No requirement without trace link to source and verification.
• No implementation handoff without mapped PRD AC IDs and test lanes.
• No happy-path-only flow for complex user/system interactions.

References

• SRS Template
• FRS Checklist
• Requirements Baseline