Point any Codeman-supported harness (Claude, opencode, Codex, Gemini, Pi,
Grok, DeepSeek, OMP) at a custom OpenAI-compatible endpoint instead of its
native cloud backend, for a given session. Covers local hardware (llama.cpp,
Ollama, vLLM, DGX Spark, Strix Halo) and cloud (Azure AI Foundry, OpenRouter).
Off by default (customModelEndpointsEnabled, synced, default OFF).
- Registry: capabilities.customModelInjection per CLI entry (env /
configContentEnv / configDir / unsupported kinds)
- Pure injection builder (custom-model-injection.ts) turning an endpoint +
model id into the real env vars / config content per CLI
- Endpoint store + CRUD routes (custom-model-hosts.ts,
custom-model-routes.ts), discovery via GET /v1/models, SSRF-guarded
- Session integration: Session.setCustomModel()/restartCli()
(POST /api/sessions/:id/custom-model), reusing the existing
respawn-pane -k primitive to restart the CLI process with new env
- Multi-user hardening: every new redirect-capable env var added to its
CLI's privilegedEnvKeys, closing a pre-existing gap where several were
already reachable via the generic envOverrides field's prefix allowlist
- Standalone scripts/test-local-llm-harnesses.mjs: spawns real CLI binaries
against a real endpoint outside the web UI, independent of tmux/sessions
- Mock-server contract tests (test/fixtures/mock-openai-server.ts) replaying
every CLI's injected values through a real HTTP shape
Real end-to-end validation against a live llama-swap server (inside a
codeman/agent:llm-test Docker image with all 9 CLI binaries) found and
fixed three real bugs before they shipped:
- Codex's config.toml schema was wrong ([model].default table instead of
a top-level model string + [model_providers.custom]); fixing it then
surfaced a genuine, documented protocol incompatibility (Codex only
speaks the Responses API since Feb 2026, which llama.cpp/llama-swap
don't implement)
- Claude Code's async session-title-generation call validates
ANTHROPIC_DEFAULT_HAIKU_MODEL against its own internal model list and
hangs the whole -p invocation on an unrecognized name; documented for
chunk 6, worked around in the standalone script only (--bare is NOT
safe for a real interactive session, which needs hooks)
- The discovery route's authStyle: 'both' option (send both Authorization
and api-key headers) reliably hung a real server; removed the option
entirely rather than just changing the default
Status: draft. Chunk 6 (frontend toolbar/settings UI) not yet built — see
PR.md and deployment_plan.md for the full chunk breakdown and confidence
table.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017HqNWfmtBU2KN29SvSVWB3
