v1.3.133

v1.3.133

Released: 2026-07-06

Summary

Major agent optimization release: three new execution acceleration features
(speculative execution, parallel pre-execution, tool result memoization),
progressive drift detection, and 8 bug fixes across agent, provider, TUI, IM,
and context management.

Features

Agent Execution Acceleration (3 new optimizations)

• Pattern-aware speculative tool execution (PASTE-inspired): While the LLM
  generates its response, predict likely next read-only tool calls and
  pre-execute them in background goroutines. When the LLM's response arrives,
  if predictions match, results are ready instantly — zero tool latency.
  Bigram pattern model with argument-linked predictions and TTL cache.
  (internal/agent/speculate.go)

• Speculator production hardening: Bounded LRU cache (max 50 entries),
  adaptive prediction threshold (self-tunes based on cache hit rate), and
  max concurrent speculations (3). Prevents unbounded memory growth and
  goroutine explosion.
  (internal/agent/speculate.go)

• Parallel pre-execution of read-only tools (LLMCompiler/W&D-inspired):
  Before the sequential tool execution loop, identifies read-only tool calls
  in the LLM batch response that are NOT in the speculative cache, and
  executes them concurrently with goroutines. Max 3 concurrent, with full
  permission check safety.
  (internal/agent/parallel_tools.go)

• Tool result memoization (ToolCaching-inspired): Lightweight cache that
  serves repeated read-only tool calls from memory instead of re-executing.
  File-based tools use mtime invalidation; search/grep uses 30s TTL; LSP
  tools use 15s TTL. Bounded LRU (50 entries), per-run reset.
  (internal/agent/memoize.go)

Agent Intelligence

• Progressive drift detection (SICA-inspired): 3 escalating levels of
  guidance when the agent appears stuck (20/40/60 iterations). Each level
  fires at most once per stall episode, resets on productive action.
  (internal/agent/overseer.go)

• Task-aware tool result preservation: ClearOldToolResults now skips
  results containing semantic error markers (error:, fail:, panic:, etc.).
  Prevents "context collapse" during debugging — error context survives
  clearing.
  (internal/context/manager.go)

Bug Fixes

• fix(im): bound approvals map growth — The IM Manager.approvals map
  never had entries deleted, causing unbounded memory growth. Added
  pruneApprovalsLocked() and fixed snapshot to exclude resolved entries.

• fix: double-Shutdown panic — Swarm and subagent managers could panic
  on double Shutdown calls. Added sync.Once protection.

• fix(tui): Esc dismisses exit/cancel confirmation — Esc key now
  properly dismisses exit and cancel confirmation prompts.

• fix: readline shortcuts cursor jump — Ctrl+K/U/W caused cursor to
  jump to wrong position after editing.

• fix(stt): check HTTP status before decoding — STT adapter tried to
  decode response body without checking HTTP status code first, causing
  confusing error messages.

• fix(provider): stop retrying 400 Bad Request — 400 errors are
  permanent (not retriable), but the retry loop would retry them
  indefinitely.

• fix(agent): add completed tool results on mid-loop cancel — When the
  agent loop is cancelled mid-execution, completed tool results were not
  added to context, losing work.

• fix(agent): failed run_command not productive — Failed run_command
  calls were incorrectly counted as "productive" in the overseer, preventing
  stall detection from triggering.

Complete Agent Optimization Stack

Layer	File	Purpose
Tool result memoization	memoize.go	Serve repeated read-only calls from cache (NEW)
Parallel execution	parallel_tools.go	Concurrent read-only tools per LLM batch
Speculative execution	speculate.go	Pre-execute during LLM generation
Tool-result clearing	agent_precompact.go	Mechanical context space recovery
Tool-use input clearing	agent_precompact.go	Extended context trimming
Progressive error streak	loop_detect.go	4/7/10 errors with escalating guidance
Progressive drift	overseer.go	20/40/60 iterations with escalating guidance
Overseer (5 modes)	overseer.go	Deterministic trajectory analysis
Repetition tracker	repetition_tracker.go	Failed-edit cluster detection
Smart verify hint	verify_hint.go	Post-edit build reminders
Reactive ratchet rules	ratchet_reactive.go	Error pattern matching in results