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## Description Claude Code disables on-demand tool loading (Tool Search) when `ANTHROPIC_BASE_URL` is a custom host and `ENABLE_TOOL_SEARCH` is unset, materializing all MCP/system tool schemas into its context window (#746). With many MCP servers this overflows the window — breaking sub-agent spawns ("prompt too long, ~214k > 200k") and forcing constant compaction. `headroom wrap claude` already sets it; `init`/install did not. Refs #746. ## Type of Change - [x] Bug fix (non-breaking change that fixes an issue) ## Changes Made - Keep tool deferral on at both entry points, sharing one `TOOL_SEARCH_ENV` / `TOOL_SEARCH_DEFAULT` constant from the Claude provider package (`providers/claude/runtime.py`) so the key/default can't drift: - `init` (`_ensure_claude_hooks`): sets `ENABLE_TOOL_SEARCH=true` via `setdefault`, respecting a pre-existing user-provided value. - `install` (`build_install_env`): always writes `ENABLE_TOOL_SEARCH=true`. This is the headroom-managed install env (recorded and reverted on uninstall), so it is authoritative rather than deferring to an existing value. ## Testing - [x] Unit tests pass (`pytest`) - [x] New tests added for new functionality - [x] Manual testing performed ### Test Output ```text $ pytest tests/test_cli/test_init_enable_tool_search.py -q 3 passed in 0.63s ``` ## Real Behavior Proof - Environment: Python 3.14, headroom proxy on :8799, ~19 MCP servers connected - Exact command / steps: launched `claude` through the proxy with vs without `ENABLE_TOOL_SEARCH=true`, asked each to spawn 5 parallel sub-agents - Observed result: without it, all 5 sub-agents fail ("prompt too long, ~214k > 200k"); with `ENABLE_TOOL_SEARCH=true` all 5 succeed and traffic compresses - Not tested: non-Claude-Code agents ## Review Readiness - [x] I have performed a self-review - [x] This PR is ready for human review --------- Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com> |
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| .. | ||
| test_copilot_auth.py | ||
| test_init_cli.py | ||
| test_init_enable_tool_search.py | ||
| test_install_cli.py | ||
| test_main_help_version.py | ||
| test_mcp.py | ||
| test_serena_disable.py | ||
| test_serena_migrate.py | ||
| test_unwrap_claude.py | ||
| test_wrap_aider.py | ||
| test_wrap_bridge.py | ||
| test_wrap_claude_base_url.py | ||
| test_wrap_codex.py | ||
| test_wrap_continue.py | ||
| test_wrap_copilot.py | ||
| test_wrap_goose.py | ||
| test_wrap_helpers.py | ||
| test_wrap_hintfile_agents.py | ||
| test_wrap_openclaw.py | ||
| test_wrap_openhands.py | ||
| test_wrap_persistent.py | ||
| test_wrap_rtk_metrics.py | ||
| test_wrap_vibe.py | ||