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

Run {run_id} checkpoint input is not a JSON object; there is

Error message

Run {run_id} checkpoint input is not a JSON object; there is no field an amend could replace

What it means

Error "Run {run_id} checkpoint input is not a JSON object; there is no field an amend could replace" thrown in zeroclaw-labs/zeroclaw.

Source

Thrown at crates/zeroclaw-runtime/src/sop/engine.rs:2810

                anyhow::Error::msg(format!(
                    "SOP '{}' step {current_step} does not declare an editable field \
                     (`- edit:`); an amend cannot apply",
                    sop.name
                ))
            })
    }

    /// Pre-flight an `Amend` WITHOUT mutating anything: the step must declare an
    /// editable field and the checkpoint's piped value must be a JSON object the
    /// field can replace into.
    fn can_amend_checkpoint(&self, run_id: &str) -> Result<()> {
        self.checkpoint_edit_field(run_id)?;
        let run = self
            .active_runs
            .get(run_id)
            .ok_or_else(|| anyhow::Error::msg(format!("Active run not found: {run_id}")))?;
        if !step_input_value(run, run.current_step).is_object() {
            bail!(
                "Run {run_id} checkpoint input is not a JSON object; \
                 there is no field an amend could replace"
            );
        }
        Ok(())
    }

    /// The step a `Revise` would re-run: the last COMPLETED step before the
    /// checkpoint, but only when it is an `llm.generate` capability (the only
    /// step kind a re-draft is meaningful for). `None` = this gate is not
    /// revisable.
    fn revisable_predecessor(&self, run_id: &str) -> Option<u32> {
        let run = self.get_run(run_id)?;
        let pred = run
            .step_results
            .iter()
            .rev()
            .find(|r| r.status == SopStepStatus::Completed && r.step_number < run.current_step)?

View on GitHub (pinned to 88bb9c8533)

Solutions

1. The checkpoint input must be a JSON object with a field to replace; there is nothing to amend.

When it happens

Trigger: Thrown at crates/zeroclaw-runtime/src/sop/engine.rs:2810 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/b4e7013d32050d5c. Report an issue: GitHub.