Summary

This PR adds conservative repair logic in run_agent.py for two malformed tool-call patterns observed in live runs:

1. repeated tool names, e.g. skills_listskills_list
2. repeated adjacent identical JSON argument payloads, e.g. {"a":1}{"a":1}

Fixes #6841

Why

These malformed payloads currently fall through to invalid-tool / invalid-JSON handling, which can cause unnecessary retries and failed tool execution.

Approach

• collapse repeated tool names only when the repair is exact and unambiguous
• collapse duplicated adjacent JSON objects only when all repeated payloads are identical
• preserve existing failure behaviour for mismatched or unsafe inputs

Tests

Added regression coverage for:

• repeated tool-name repair
• duplicated JSON argument repair
• mismatched duplicated JSON remaining invalid