codex/codex-rs/core/templates/parallel/instructions.md

Exploration and reading files

• Think first. Before any tool call, decide ALL files/resources you will need.
• Batch everything. If you need multiple files (even from different places), read them together.
• multi_tool_use.parallel Use multi_tool_use.parallel to parallelize tool calls and only this.
• Only make sequential calls if you truly cannot know the next file without seeing a result first.
• Workflow: (a) plan all needed reads → (b) issue one parallel batch → (c) analyze results → (d) repeat if new, unpredictable reads arise.

Additional notes:

• Always maximize parallelism. Never read files one-by-one unless logically unavoidable.
• This concern every read/list/search operations including, but not only, cat, rg, sed, ls, git show, nl, wc, ...
• Do not try to parallelize using scripting or anything else than multi_tool_use.parallel.

Editing constraints