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feat: config discovery and CLAUDE.md loading (cherry-picked from rcc/runtime)

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This commit is contained in:
Yeachan-Heo
2026-04-01 00:40:34 +00:00
parent 863958b94c
commit d6341d54c1
5 changed files with 200 additions and 28 deletions
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58
rust/crates/runtime/src/prompt.rs
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@@ -201,6 +201,7 @@ fn discover_instruction_files(cwd: &Path) -> std::io::Result<Vec<ContextFile>> {
dir.join("CLAUDE.md"),
dir.join("CLAUDE.local.md"),
dir.join(".claude").join("CLAUDE.md"),
dir.join(".claude").join("instructions.md"),
] {
push_context_file(&mut files, candidate)?;
}
@@ -468,6 +469,10 @@ mod tests {
std::env::temp_dir().join(format!("runtime-prompt-{nanos}"))
}
fn env_lock() -> std::sync::MutexGuard<'static, ()> {
crate::test_env_lock()
}
#[test]
fn discovers_instruction_files_from_ancestor_chain() {
let root = temp_dir();
@@ -477,10 +482,21 @@ mod tests {
fs::write(root.join("CLAUDE.local.md"), "local instructions")
.expect("write local instructions");
fs::create_dir_all(root.join("apps")).expect("apps dir");
fs::create_dir_all(root.join("apps").join(".claude")).expect("apps claude dir");
fs::write(root.join("apps").join("CLAUDE.md"), "apps instructions")
.expect("write apps instructions");
fs::write(
root.join("apps").join(".claude").join("instructions.md"),
"apps dot claude instructions",
)
.expect("write apps dot claude instructions");
fs::write(nested.join(".claude").join("CLAUDE.md"), "nested rules")
.expect("write nested rules");
fs::write(
nested.join(".claude").join("instructions.md"),
"nested instructions",
)
.expect("write nested instructions");
let context = ProjectContext::discover(&nested, "2026-03-31").expect("context should load");
let contents = context
@@ -495,7 +511,9 @@ mod tests {
"root instructions",
"local instructions",
"apps instructions",
"nested rules"
"apps dot claude instructions",
"nested rules",
"nested instructions"
]
);
fs::remove_dir_all(root).expect("cleanup temp dir");
@@ -574,7 +592,12 @@ mod tests {
)
.expect("write settings");
let _guard = env_lock();
let previous = std::env::current_dir().expect("cwd");
let original_home = std::env::var("HOME").ok();
let original_claude_home = std::env::var("CLAUDE_CONFIG_HOME").ok();
std::env::set_var("HOME", &root);
std::env::set_var("CLAUDE_CONFIG_HOME", root.join("missing-home"));
std::env::set_current_dir(&root).expect("change cwd");
let prompt = super::load_system_prompt(&root, "2026-03-31", "linux", "6.8")
.expect("system prompt should load")
@@ -584,6 +607,16 @@ mod tests {
",
);
std::env::set_current_dir(previous).expect("restore cwd");
if let Some(value) = original_home {
std::env::set_var("HOME", value);
} else {
std::env::remove_var("HOME");
}
if let Some(value) = original_claude_home {
std::env::set_var("CLAUDE_CONFIG_HOME", value);
} else {
std::env::remove_var("CLAUDE_CONFIG_HOME");
}
assert!(prompt.contains("Project rules"));
assert!(prompt.contains("permissionMode"));
@@ -631,6 +664,29 @@ mod tests {
assert!(rendered.chars().count() <= 4_000 + "\n\n[truncated]".chars().count());
}
#[test]
fn discovers_dot_claude_instructions_markdown() {
let root = temp_dir();
let nested = root.join("apps").join("api");
fs::create_dir_all(nested.join(".claude")).expect("nested claude dir");
fs::write(
nested.join(".claude").join("instructions.md"),
"instruction markdown",
)
.expect("write instructions.md");
let context = ProjectContext::discover(&nested, "2026-03-31").expect("context should load");
assert!(context
.instruction_files
.iter()
.any(|file| file.path.ends_with(".claude/instructions.md")));
assert!(
render_instruction_files(&context.instruction_files).contains("instruction markdown")
);
fs::remove_dir_all(root).expect("cleanup temp dir");
}
#[test]
fn renders_instruction_file_metadata() {
let rendered = render_instruction_files(&[ContextFile {