export const FALLBACK_TOOL_INSTRUCTIONS = `This model does not support native function calling. To call a tool, write exactly one fenced code block of the form:

\`\`\`tool_call
{"name": "TOOL_NAME", "arguments": {"arg1": "value1", "arg2": "value2"}}
\`\`\`

Rules:
- One tool call per response. Wait for the \`\`\`tool_result\`\`\` before calling another.
- The fenced block must contain a single JSON object with exactly two keys: "name" and "arguments".
- "arguments" must be an object matching the tool's schema. Do not put the arguments at the top level.
- If no tool is needed, answer normally without any \`\`\`tool_call\`\`\` block.

Example:
\`\`\`tool_call
{"name": "read_file", "arguments": {"path": "src/index.ts", "limit": 50}}
\`\`\`

When a tool result shows an error or empty output, do not repeat the exact same call. Adjust your arguments or ask the user.`;

export const FALLBACK_RETRY_NUDGE = `Your last \`tool_call\` block was invalid. Check:
- It must be a single JSON object inside the fence, not plain text or multiple objects.
- It must have "name" (string) and "arguments" (object) keys.
- Argument values must match the tool's expected types.
Try again with the correct format, or answer without a tool call.`;