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sdlc

Multi-harness control plane

State: closed/retired · Kind: system · Audience: user

Summary

Section titled “Summary”
  • Retired in T-1NWG. sdlc used to author an agentic harness ONCE as a canonical, host-neutral model and emit it to multiple control planes — Claude Code, Codex, Cursor, Gemini — via a set of per-host exporters (sdlc harness export <target>).
  • Once the agent-pants vault build (T-CIAA, T-66RD, T-FQN9) became sdlc’s sole build path for producing the Claude plugin itself, the exporters were a redundant, unused second build path — no host besides Claude was ever actually shipped — and were deleted along with harness export.
  • The canonical, host-neutral HarnessModel shape and its Claude-derivation reader (deriveHarnessModel / importClaude, exposed as sdlc harness model) survive as a read-only introspection op over the built plugin; see D-HRNS-harness-model-and-exporters for the original decision record (kept for history, not amended).

Statement

Section titled “Statement”

An agentic harness is the surface a coding agent runs inside: its invocable capabilities, the context it carries, the tools it may use, the servers it can reach, and the lifecycle hooks that fire around it. This capability used to hold a canonical model of the surface plus a set of exporters projecting it onto Claude Code, Codex, Cursor, and Gemini. No host besides Claude was ever shipped through it, and Claude’s own plugin is now produced by the agent-pants vault build directly (not through this model), so the multi-host projection this capability named is retired. sdlc harness model’s read-only introspection of the model remains, documented at C-HRNS-multi-harness-control-plane’s locations.

What it provides

Section titled “What it provides”
  • A canonical HarnessModel (metadata, capabilities, hooks, MCP servers, permissions, documents), validated with markdown-contract.
  • An importer that bootstraps the model from an existing Claude surface (still live).
  • Exporters that emitted the native surface for Claude Code, Codex, Cursor, and Gemini, plus a portable harness.json interchange form (retired in T-1NWG).
  • sdlc harness export <target> (retired) and sdlc harness model (still live, read-only) on the deterministic op substrate.

Locations

Section titled “Locations”
  • packages/ts/agent-plugin/
  • solutions/ontological/lib/services/harness/ops/

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