tinyhumansai/openhuman · error

first non-empty line of {} (line {}) is not a valid _meta ob

Error message

first non-empty line of {} (line {}) is not a valid _meta object: {err}

What it means

Error "first non-empty line of {} (line {}) is not a valid _meta object: {err}" thrown in tinyhumansai/openhuman.

Source

Thrown at src/openhuman/agent/harness/session/transcript.rs:1005

    let mut messages: Vec<ChatMessage> = Vec::new();
    let mut compactions_replayed = 0usize;
    let mut interrupted_skipped = 0usize;

    // Append-only log replay (Phase A): the first non-empty line MUST be the
    // `_meta` header; subsequent lines are messages, `compaction` records
    // (which *replace* the accumulated context), interrupted partials (skipped
    // for the model-context path), or refreshed `_meta` lines (last wins).
    let mut seen_first = false;
    for (line_no, line) in raw.lines().enumerate() {
        let line = line.trim();
        if line.is_empty() {
            continue;
        }

        if !seen_first {
            seen_first = true;
            let ml: MetaLine = serde_json::from_str(line).map_err(|err| {
                anyhow::anyhow!(
                    "first non-empty line of {} (line {}) is not a valid _meta object: {err}",
                    path.display(),
                    line_no + 1,
                )
            })?;
            meta = Some(meta_from_payload(ml.meta));
            continue;
        }

        match classify_line(line) {
            Ok(LineKind::Meta(ml)) => {
                // Refreshed cumulative meta — last one wins.
                meta = Some(meta_from_payload(ml.meta));
            }
            Ok(LineKind::Compaction(cl)) => {
                // Reduction record: the reduced context REPLACES everything
                // accumulated so far, exactly reproducing the old full-rewrite.
                let replacement: Vec<ChatMessage> =

View on GitHub (pinned to a221052e0d)

When it happens

Trigger: Thrown at src/openhuman/agent/harness/session/transcript.rs:1005 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of tinyhumansai/openhuman@a221052e0d (2026-08-16). Data as JSON: /api/errors/468d588ce733be66. Report an issue: GitHub.