Summary

• Add lightweight benchmark/profile scripts for packages/opencode test-suite research.
• Reduce avoidable test setup across slow plugin, provider, workspace, SDK, config, HTTP listener, prompt, and processor-effect tests.
• Preserve coverage where review showed setup mattered: prompt shell queue/cancel tests still use git-backed fixtures, and SDK read-route parity still exercises git-backed VCS output.
• Record kept/discarded measurements and the safety-review correction in perf/test-suite.md.

Measurements

• Initial full-suite benchmark: 250.922s.
• Current reviewed full-suite benchmark: 202.317s via bun run bench:test.
• Total measured savings: 48.605s, about 19.4% faster.
• An intermediate unsafe benchmark reached 186.729s, but review found that removed coverage from several prompt shell tests and SDK VCS parity, so those parts were restored.

Focused wins include:

• test/session/prompt.test.ts: 26.930s -> 19.610s targeted after restoring shell queue/cancel coverage.
• test/session/processor-effect.test.ts: 12.500s -> 9.230s targeted.
• test/server/httpapi-listen.test.ts: 10.554s -> 7.818s, then 7.051s -> 6.170s targeted.
• test/server/httpapi-provider.test.ts: 7.905s -> 2.980s targeted.
• test/cli/tui/plugin-lifecycle.test.ts: 7.330s -> 1.507s targeted.
• test/server/httpapi-sdk.test.ts: 8.011s -> 5.180s targeted, with VCS parity restored for read routes.
• test/control-plane/workspace.test.ts: 12.949s -> 8.305s targeted.
• test/tool/skill.test.ts: 2.320s -> 1.425s targeted.

Safety Review

• Parallel review found no public API compatibility issues; new timeout parameters are optional and preserve production defaults.
• Prompt shell queue/cancel tests were failing without their original git-backed fixture and deterministic busy wait; restored both.
• SDK instance read-route parity no longer lost VCS coverage; it now opts into a git fixture and asserts branch-shaped VCS data.
• Benchmark script now rejects invalid BENCH_RUNS=0 / negative warmup inputs instead of crashing.

Verification

• bun run test -- test/session/prompt.test.ts: 53 pass, 0 fail.
• bun run test -- test/server/httpapi-sdk.test.ts: 16 pass, 0 fail.
• bun run test -- test/server/httpapi-listen.test.ts test/server/httpapi-provider.test.ts test/server/httpapi-sdk.test.ts: 24 pass, 0 fail.
• bun run bench:test: 2609 tests, 0 fail, 202.317s.
• bun typecheck from packages/opencode.
• bunx prettier --check ... for changed files.
• File-scoped bunx oxlint ...: 0 errors; existing warnings remain in legacy tests.
• Pre-push bun turbo typecheck passed.