openai/codex · error · anyhow::Error

network.mitm_hooks[{hook_index}].match.path_prefixes must no

Error message

network.mitm_hooks[{hook_index}].match.path_prefixes must not be empty

What it means

Error "network.mitm_hooks[{hook_index}].match.path_prefixes must not be empty" thrown in openai/codex.

Source

Thrown at codex-rs/network-proxy/src/mitm_hook.rs:199

    for (hook_index, hook) in hooks.iter().enumerate() {
        let host = normalize_hook_host(&hook.host)
            .with_context(|| format!("invalid network.mitm_hooks[{hook_index}].host"))?;

        let methods = normalize_methods(&hook.matcher.methods)
            .with_context(|| format!("invalid network.mitm_hooks[{hook_index}].match.methods"))?;
        if methods.is_empty() {
            return Err(anyhow!(
                "network.mitm_hooks[{hook_index}].match.methods must not be empty"
            ));
        }

        let path_prefixes =
            compile_path_matchers(&hook.matcher.path_prefixes).with_context(|| {
                format!("invalid network.mitm_hooks[{hook_index}].match.path_prefixes")
            })?;
        if path_prefixes.is_empty() {
            return Err(anyhow!(
                "network.mitm_hooks[{hook_index}].match.path_prefixes must not be empty"
            ));
        }

        if let Some(body) = hook.matcher.body.as_ref() {
            let _ = body;
            return Err(anyhow!(
                "network.mitm_hooks[{hook_index}].match.body is reserved for a future release and is not yet supported"
            ));
        }

        validate_query_constraints(&hook.matcher.query)
            .with_context(|| format!("invalid network.mitm_hooks[{hook_index}].match.query"))?;
        validate_header_constraints(&hook.matcher.headers)
            .with_context(|| format!("invalid network.mitm_hooks[{hook_index}].match.headers"))?;
        validate_strip_request_headers(&hook.actions.strip_request_headers).with_context(|| {
            format!("invalid network.mitm_hooks[{hook_index}].actions.strip_request_headers")
        })?;

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/network-proxy/src/mitm_hook.rs:199 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of openai/codex@339751715c (2026-08-25). Data as JSON: /api/errors/4a0eadb5a113d7b9. Report an issue: GitHub.