Run the implement pipeline over multiple backlog tickets in one session. Per ticket: spawn architect → spawn developer → spawn reviewer (the same three-phase pipeline $implement runs), then move to the next. Sequential by default; parallel only when the user explicitly opts in AND the tickets are independent. Reports an aggregated verdict at the end. Use when the user invokes `$batch-implement #N #M #K` or `$batch-implement --status todo`.
Implement a single backlog ticket through a multi-phase pipeline: architect plans (OpenSpec proposal+design+tasks+specs), sr-developer codes in TDD order, sr-reviewer validates (correctness, tests, security, performance). A profile may add custom-* rails. Reads .specrails/local-tickets.json, closes the ticket in place, reports concisely. Use when the user invokes `$implement #N` or `$implement <free-form>`.
Architect role for the specrails implement pipeline. Reads a backlog ticket, surveys the repo, produces (a) an OpenSpec change package under openspec/changes/<slug>/ and (b) a plan artefact under .specrails/agent-memory/explanations/. Does NOT write production code. Invoked by the implement orchestrator via $sr-architect after a spawn_agent / send_message handoff.
Developer role for the specrails implement pipeline. Reads the architect's design + tasks.md and implements them in TDD order: for each task, write a failing test first, run it to confirm it fails, then write the minimum production code to make it pass, then re-run. Reports the files changed. Does NOT review its own work beyond the per-task test cycle. Invoked by the implement orchestrator via $sr-developer.
Reviewer role for the specrails implement pipeline. Validates the entire implementation: the OpenSpec change package (proposal/design/tasks/specs) is well-formed, the developer's code matches the design's public API and invariants, every tasks.md box is ticked, the tests cover every spec scenario, and the project's full test/build suite passes. Writes a confidence-score.json artefact. Does NOT modify the developer's code. Invoked via $sr-reviewer.
sr:batch-implement — Batch implementation orchestrator. Accepts multiple feature references, computes dependency-aware execution waves, invokes sr:implement per wave.
sr:implement — Full OpenSpec lifecycle with specialized agents: architect designs, developer implements, reviewer validates. Use for implementing feature descriptions or backlog tickets.
Implement tasks from an OpenSpec change. Use when the user wants to start implementing, continue implementation, or work through tasks.