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fix: parallel tool call instruction injection #6893

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Merged
merged 3 commits into from
Nov 19, 2025
+8 −7
Merged

fix: parallel tool call instruction injection #6893

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82d7d2d
fix: parallel tool call instruction injection
jif-oai Nov 19, 2025
c021cf1
FMT
jif-oai Nov 19, 2025
4eb9e14
Fix
jif-oai Nov 19, 2025
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12 changes: 7 additions & 5 deletions codex-rs/core/src/codex.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1982,12 +1982,14 @@ async fn run_turn(
let mut base_instructions = turn_context.base_instructions.clone();
if parallel_tool_calls {
static INSTRUCTIONS: &str = include_str!("../templates/parallel/instructions.md");
static INSERTION_SPOT: &str = "## Editing constraints";
base_instructions
.as_mut()
.map(|base| base.replace(INSERTION_SPOT, INSTRUCTIONS));
if let Some(family) =
find_family_for_model(&sess.state.lock().await.session_configuration.model)
{
let mut new_instructions = base_instructions.unwrap_or(family.base_instructions);
new_instructions.push_str(INSTRUCTIONS);
base_instructions = Some(new_instructions);
}
}

let prompt = Prompt {
input,
tools: router.specs(),
Expand Down
3 changes: 1 addition & 2 deletions codex-rs/core/templates/parallel/instructions.md
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@

## Exploration and reading files

- **Think first.** Before any tool call, decide ALL files/resources you will need.
Expand All @@ -10,5 +11,3 @@
* 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
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