can1357/oh-my-pi · error

approve received invalid arguments: ${params.summary}

Error message

approve received invalid arguments: ${params.summary}

What it means

The `approve` tool validates its raw arguments against `approveSchema` (`{ verdict: string>0 }`, unknown keys rejected). When validation fails, the executor throws with the ArkType error summary. The agent must supply a non-empty verdict string and nothing else.

Source

Thrown at packages/coding-agent/src/compress/protocol.ts:207

					losses: draft.losses.length,
				};
				return { content: [{ type: "text", text: summary }], details };
			},
		};
	}

	/** Tool that accepts the newest reviewed draft. Thin adapter over {@link accept}. */
	approveTool(): ToolDefinition {
		return {
			name: "approve",
			label: "Approve",
			description: approveDescription.trim(),
			parameters: approveSchema,
			approval: "read",
			strict: true,
			execute: async (_toolCallId, rawParams) => {
				const params = approveSchema(rawParams);
				if (params instanceof type.errors) throw new Error(`approve received invalid arguments: ${params.summary}`);
				const draft = this.accept(params.verdict);
				const details: ApproveDetails = { round: draft.round };
				return {
					content: [{ type: "text", text: `Draft ${draft.round} approved. The run ends here.` }],
					details,
				};
			},
		};
	}
}

View on GitHub (pinned to 9690622007)

Solutions

1. Re-invoke `approve` with exactly `{ verdict: "<non-empty reason for accepting>" }` and no other keys
2. Read the thrown `params.summary` for the exact violated constraint
3. Check the tool call JSON for truncation or extra fields if the arguments look well-formed at a glance

Example fix

// before
approve({})
// after
approve({ verdict: "All declared losses are acceptable; draft preserves required behavior." })

const parsed = approveSchema(rawParams);
if (parsed instanceof type.errors) {
  // repair/retry the tool call using parsed.summary before executing
}

function isApproveArgs(p: unknown): p is { verdict: string } {
  return approveSchema(p) instanceof type.errors === false;
}

try {
  await approveTool.execute(id, rawParams);
} catch (err) {
  if (err instanceof Error && err.message.startsWith("approve received invalid arguments")) {
    // ask the model to re-emit approve with a non-empty verdict and no extra keys
  } else throw err;
}

When it happens

Trigger: Calling the `approve` tool with `verdict` missing or an empty string, or with any extra property alongside `verdict` (schema uses `"+": "reject"`).

Common situations: A model emits `approve({})` or `approve({ verdict: "" })` when it has nothing to say; extra fields like `draftId` are attached; malformed streaming JSON yields a partial object.

Understand the failure class

Background: Schema validation failed / invalid input schema: payload rejected because its shape doesn't match the expected schema — this error's family across 28 libraries.

Related errors

• rewrite received invalid arguments: ${params.summary}
• anthropic-messages: ${data.summary}
• Schema contains a circular object graph — cannot enforce str
• Schema node has no type, combinator, or $ref — cannot enforc
• Validation failed for tool "${toolCall.name}":\n${errors}\n\

AI-assisted analysis of can1357/oh-my-pi@9690622007 (2026-08-31). Data as JSON: /api/errors/cb5fe3ceb64c2333. Report an issue: GitHub.