feat(tool): add experimental rlm_repl tool#29018
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Adds an experimental RLM REPL tool with a VM-backed JavaScript execution context, pointer-style context storage, sub-LLM call helpers, and runtime guardrails for sandbox escapes and resource limits.
Wires the new tool into the current Effect-based registry behind OPENCODE_EXPERIMENTAL_RLM_REPL so it stays opt-in while preserving default tool lists.
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Issue for this PR
Related: #8555
This is a fresh port of the closed
rlm_replPR onto currentdev.Type of change
What does this PR do?
Adds an experimental
rlm_repltool for VM-backed JavaScript execution during tool calls. It includes pointer-based context storage,sub_llm/sub_llm_parallelhelpers, sandbox guardrails, and resource limits.The tool is opt-in only via
OPENCODE_EXPERIMENTAL_RLM_REPL/experimentalRlmRepl, and registration is gated in the current Effect-based tool registry. This intentionally ports the idea from #8555 instead of rebasing it because the old flag module and registry wiring changed upstream.Thanks @androolloyd, @mwalol, and @cloudpresser for the original direction and discussion.
How did you verify your code works?
bun test test/effect/runtime-flags.test.ts test/tool/registry.test.ts test/tool/rlm-repl.test.ts— 60 passbun run typecheck— passbunx prettier --check packages/opencode/src/tool/rlm-repl.ts packages/opencode/src/tool/registry.ts packages/opencode/src/effect/runtime-flags.ts packages/opencode/test/tool/rlm-repl.test.ts packages/opencode/test/tool/registry.test.ts packages/opencode/test/effect/runtime-flags.test.ts— passbun run build— passbun turbo typechecksuccessfullyScreenshots / recordings
Not applicable; this is a non-UI tool/runtime change.
Checklist