Module compression 

TACO: self-evolving tool output compression.

The core abstraction is OutputCompressor, an async trait that post-processes raw tool output before it is injected into the LLM context. When disabled, the IdentityCompressor is wired in — its compress always returns Ok(None) and is zero-cost beyond one virtual call per tool output.

Architecture

• OutputCompressor — core async trait.
• IdentityCompressor — default no-op.
• RuleBasedCompressor — regex rules loaded from SQLite.
• CompressedExecutor — decorator wrapping the root crate::ToolExecutor.
• CompressionRuleStore — SQLite/Postgres-backed rule persistence.
• safe_compile — DoS-safe regex compilation with timeout.

Invariants

• T1: IdentityCompressor is the only compressor when [tools.compression] enabled = false.
• T4: Audit logging happens inside individual tool implementations, not inside CompressedExecutor. Because compression wraps outside the tool boundary, audit JSONL always records the raw pre-compression payload.

Re-exports

pub use decorator::CompressedExecutor;

Modules

decorator

CompressedExecutor<E> — decorator that post-processes tool output through a compressor.

Structs

CompressionRule

A single compression rule stored in the database.

CompressionRuleStore

Persistence layer for TACO compression rules.

IdentityCompressor

Pass-through compressor that never modifies tool output.

RuleBasedCompressor

Regex-based compressor that applies operator- and LLM-evolved rules to tool output.

Enums

CompressionError

Error variants for compression operations.

Traits

OutputCompressor

Core abstraction for tool output compression.

Functions

safe_compile

Compile a regex pattern with DoS protection.