zeroclaw-labs/zeroclaw · error · anyhow::Error

Run {run_id} has no llm.generate predecessor step to re-run;

Error message

Run {run_id} has no llm.generate predecessor step to re-run; this gate is not revisable

What it means

Error "Run {run_id} has no llm.generate predecessor step to re-run; this gate is not revisable" thrown in zeroclaw-labs/zeroclaw.

Source

Thrown at crates/zeroclaw-runtime/src/sop/engine.rs:2851

            .then_some(pred)
    }

    /// Pre-flight a `Revise` WITHOUT mutating anything: the revision cap has not
    /// been reached and the gate has an `llm.generate` predecessor to re-run.
    fn can_revise_checkpoint(&self, run_id: &str) -> Result<()> {
        let run = self
            .get_run(run_id)
            .ok_or_else(|| anyhow::Error::msg(format!("Active run not found: {run_id}")))?;
        // Per-GATE budget: presentations spent at THIS gate, not run-wide
        // (`revision` also advances when a later gate first parks).
        if run.revision.saturating_sub(run.revision_base) >= MAX_GATE_REVISIONS {
            bail!(
                "Run {run_id} has reached this gate's revision limit ({MAX_GATE_REVISIONS}); \
                 approve, edit, or deny the current draft"
            );
        }
        if self.revisable_predecessor(run_id).is_none() {
            bail!(
                "Run {run_id} has no llm.generate predecessor step to re-run; \
                 this gate is not revisable"
            );
        }
        Ok(())
    }

    /// Re-run the checkpoint's predecessor `llm.generate` step with the operator's
    /// guidance framed as reviewer feedback, replace the recorded draft, bump the
    /// gate revision, and re-present the gate. The run never leaves
    /// `PausedCheckpoint`: a failed re-draft keeps the OLD draft parked and
    /// answerable. The caller commits the new snapshot and ledger event together.
    /// The model call blocks under the engine lock — the same tradeoff as a normal
    /// `llm.generate` step.
    fn revise_checkpoint_draft(&mut self, run_id: &str, guidance: &str) -> Result<()> {
        let (_, sop) = self.resolve_active_run_sop(run_id)?;
        let pred_number = self.revisable_predecessor(run_id).ok_or_else(|| {
            anyhow::Error::msg(format!(

View on GitHub (pinned to 88bb9c8533)

Solutions

1. This gate has no llm.generate predecessor to re-run; resolve it with approve/edit/deny instead.

When it happens

Trigger: Thrown at crates/zeroclaw-runtime/src/sop/engine.rs:2851 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zeroclaw-labs/zeroclaw@88bb9c8533 (2026-08-23). Data as JSON: /api/errors/254bd1e61ed722f8. Report an issue: GitHub.