feat(parser): add fuel-based operation limit to prevent DoS#66
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Add parser fuel tracking to prevent CPU exhaustion from pathological input:
- Parser tracks fuel consumption on every token advance
- Default limit: 100,000 operations (matches ExecutionLimits)
- Parser::with_fuel() constructor for custom limits
- Bash::exec() uses configured limits from ExecutionLimits
- Error: Parse("parser fuel exhausted (N operations, max M)")
Security: Prevents V3 (Parser Hang) attacks from threat model.
https://claude.ai/code/session_018gzyudqmPsjaDgCxmKVLtg
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Summary
max_parser_operationsfield to ExecutionLimits (default: 100,000)ParserExhaustedvariant to LimitExceeded error enumSecurity: Prevents V3 (Parser Hang) attacks from threat model by limiting parser CPU consumption.
Test plan
cargo test- all tests passcargo clippy- no warningshttps://claude.ai/code/session_018gzyudqmPsjaDgCxmKVLtg