Both built-in agents previously set model="haiku", which caused
subprocess spawning to fail for users running any non-Anthropic provider
(OpenAI, Bedrock, custom base URLs, etc.) because the literal string
"haiku" is not a valid model on those APIs.
Changes:
- Explore and claude-code-guide now use model="inherit", consistent
with the existing Plan and verification built-in agents.
- build_inherited_cli_flags now skips the --model flag when the value
is "inherit", so the subprocess inherits the parent model via the
OPENHARNESS_MODEL env var that build_inherited_env_vars already
forwards. Previously "inherit" was passed verbatim as a model name,
which would have also broken Plan and verification agents.
Tests added:
- build_inherited_cli_flags: model="inherit" and model=None produce no
--model flag; a real model name is included as expected.
- Builtin agent definitions: Explore and claude-code-guide must not
reference Anthropic-only model aliases; Plan, verification, Explore,
and claude-code-guide must all use None or "inherit".
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
- Update prompt assertions to match new OpenHarness system prompt
- Update agent definition tests (verification not verifier, tools=['*'])
- Add pytest.mark.skipif for tests needing real API or AutoAgent workspace
- Fix agent tool test for InProcessBackend same-name spawn conflict
- Fix flaky worktree test for CI environments
A lightweight open-source Python implementation of the Agent Harness architecture.
44x lighter than Claude Code (11K vs 512K lines), 98% core tool coverage.
- 43 tools with Pydantic validation and parallel execution
- Skills system compatible with anthropics/skills (17+ tested)
- Plugin system compatible with claude-code/plugins (12+ tested)
- API retry with exponential backoff
- Multi-level permissions with path rules
- React/Ink TUI with "Oh my Harness!" branding
- 114 unit tests + 6 E2E test suites
- MIT License
yulin