feat(harness): crush CLI harness — 3/4 column (RFC-006 Phase 5)#55
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Fourth agentic harness (model-agnostic, charmbracelet/crush). Go binary; runs
the same open coder models via an openai-compat provider. Built + isolation-
smoked end-to-end (crush run → proxy → wrote a file in the sandbox).
- infra/docker/harness-crush: pinned crush v0.75.0 release binary (direct download).
- _crush_invocation recipe: crush.json via config_files (openai-compat provider,
api_key=$LITELLM_MASTER_KEY literal → key never written to the file). Crush
discovers config via CRUSH_GLOBAL_CONFIG=/workspace (a DIRECTORY) and writes its
session DB to CRUSH_GLOBAL_DATA=/tmp (outside /workspace → out of the patch).
- stacks/crush/stack.yaml: command `crush run -q`, L1+L2.
- tests: crush recipe-proven; supported_harnesses={aider,goose,opencode,crush}.
ruff + mypy --strict clean; 13/13 stack specs valid.
Refs: rfc-006-stack-executor
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…oder 6.25) --add-stack crush → board 26/33. crush handles 3/4 coders (devstral failed), notably MORE than opencode (1/4) — crush's tool-handling tolerates qwen3-coder and codestral that opencode's openai-provider rejected (XML tool calls). Real harness×model compat so far: aider 4/4, goose 3/4, crush 3/4, opencode 1/4. Refs: rfc-006-stack-executor Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
Fifth agentic harness — crush (charmbracelet), model-agnostic (Go binary).
Result (live on the board)
board.jsonnow 26/33 scored. crush column onbe_01_jwt_auth: codestral7.08 · qwen-3-14b 6.75 · qwen3-coder-30b 6.25 · devstral FAILED.
Harness × model compatibility (the product) so far on the 4 coders:
crush tolerates qwen3-coder-30b + codestral that opencode's openai provider
rejected — the harness engine, not just the model, drives compatibility.
How
_crush_invocationrecipe: crush.json via config_files (openai-compat provider,api_key=$LITELLM_MASTER_KEYliteral → key not in the file).CRUSH_GLOBAL_CONFIG= /workspace(a DIRECTORY) +CRUSH_GLOBAL_DATA=/tmp(session DB out of the patch).stacks/crush/stack.yaml:crush run -q.Verify
730 tests green; ruff + mypy --strict clean; 13/13 stack specs valid. Isolation-
smoked end-to-end.
Refs: rfc-006-stack-executor
🤖 Generated with Claude Code