can1357/oh-my-pi · error · FileNotFoundError

Output not found: {', '.join(not_found)}\n\nAvailable output

Error message

Output not found: {', '.join(not_found)}\n\nAvailable outputs: {', '.join(available[:20])} (and {len(available) - 20} more)

What it means

After iterating the requested ids, `output()` raises this FileNotFoundError if any id had no corresponding `<id>.md` file in the artifacts directory. The message lists every missing id and up to 20 available output ids (plus a count of the rest) to help you correct the lookup.

Source

Thrown at packages/coding-agent/src/eval/py/prelude.py:293

                }
                if range_info:
                    result_data["range"] = range_info
                if query:
                    result_data["query"] = query
                results.append(result_data)
            else:
                results.append({"id": output_id, "content": selected_content})

        # Handle not found
        if not_found:
            available = sorted([f.stem for f in Path(artifacts_dir).glob("*.md")])
            error_msg = f"Output not found: {', '.join(not_found)}"
            if available:
                error_msg += f"\n\nAvailable outputs: {', '.join(available[:20])}"
                if len(available) > 20:
                    error_msg += f" (and {len(available) - 20} more)"
            _emit_status("output", not_found=not_found, available_count=len(available))
            raise FileNotFoundError(error_msg)

        # Return format
        if len(ids) == 1:
            if format == "json":
                _emit_status("output", id=ids[0], chars=results[0]["char_count"])
                return results[0]
            _emit_status("output", id=ids[0], chars=len(results[0]["content"]))
            return results[0]["content"]

        # Multiple IDs
        if format == "json":
            total_chars = sum(r["char_count"] for r in results)
            _emit_status("output", count=len(results), total_chars=total_chars)
            return results

        combined_output: list[dict] = []
        for r in results:
            combined_output.append({"id": r["id"], "content": r["content"]})

View on GitHub (pinned to 9690622007)

Solutions

1. Use the 'Available outputs' list in the error message to pick the correct id.
2. Enumerate the artifacts directory (session `.jsonl` path minus extension) with `glob('*.md')` and match ids before calling.
3. Re-run the tool call that should have produced the artifact if it's genuinely missing.

Example fix

// before
ids = ["tool_9", "tool_10"]
result = output(ids)

// after
import pathlib
available = {p.stem for p in pathlib.Path(artifacts_dir).glob("*.md")}
ids = [i for i in ("tool_9", "tool_10") if i in available]
result = output(ids) if ids else None

import pathlib
available = {p.stem for p in pathlib.Path(artifacts_dir).glob("*.md")}
missing = [i for i in ids if i not in available]
if missing:
    print(f"skipping missing: {missing}")
    ids = [i for i in ids if i in available]

try:
    result = output(ids)
except FileNotFoundError as e:
    msg = str(e)
    available_section = msg.split("Available outputs:")[-1].split("\n")[0]
    print(f"ids not found; available: {available_section}")
    result = None

When it happens

Trigger: Calling `output(["tool_9"])` where `tool_9.md` doesn't exist; typo'd ids; querying a previous session's ids against a different run's artifacts directory.

Common situations: Referring to tool-call ids from memory instead of the session; artifacts directory cleared or regenerated between runs; ids from one eval session used while pointed at another session's artifacts.

Understand the failure class

Background: "File not found" and ENOENT errors: why libraries can't find a file that should exist — this error's family across 50 libraries.

Related errors

• No session - output artifacts unavailable
• No artifacts directory found: {artifacts_dir}
• At least one output ID is required
• query cannot be combined with offset/limit
• Output {output_id} is not valid JSON: {e}

AI-assisted analysis of can1357/oh-my-pi@9690622007 (2026-08-31). Data as JSON: /api/errors/8b1f4ae55c0ddf7d. Report an issue: GitHub.