Files
CoreRasurae a8f68b8262
CI / lint (pull_request) Successful in 50s
CI / typecheck (pull_request) Successful in 55s
CI / security (pull_request) Successful in 53s
CI / quality (pull_request) Successful in 38s
CI / unit_tests (pull_request) Successful in 3m15s
CI / integration_tests (pull_request) Successful in 1m14s
CI / build (pull_request) Successful in 39s
CI / coverage (pull_request) Successful in 3m16s
CI / status-check (pull_request) Successful in 3s
CI / lint (push) Successful in 37s
CI / typecheck (push) Successful in 56s
CI / security (push) Successful in 54s
CI / quality (push) Successful in 37s
CI / unit_tests (push) Successful in 3m15s
CI / integration_tests (push) Successful in 1m14s
CI / build (push) Successful in 39s
CI / coverage (push) Successful in 3m16s
CI / status-check (push) Successful in 3s
fix(graph): enforce USD budget at each agent invocation with pre-flight gate
Enforces the USD budget (max_cost_usd) as a hard pre-flight gate before
every node execution and at each main-agent ainvoke round inside the
multi-turn tool loop, with pruning passes silently skipped when the
budget is exhausted.

Pre-flight gate (pure_graph.py):
  _check_budget_pre_flight() raises ExecutionError(kind='cost',
  reason='budget_exhausted') immediately before node execution in both
  _execute_from_node and all three branches of _stream_from_node.

In-node budget gating (llm.py):
  _check_budget_before_invoke() gates every _retry_ainvoke() call
  inside _execute_tool_loop, process_message, and stream_message.
  _should_skip_pruning() skips pruning passes when budget exhausted.
  _accumulate_cost_after_invoke() computes USD cost from token counts
  using the pricing table and advances current_accumulated_cost so
  subsequent budget checks see the updated cost.

ContextVar plumbing (retry.py, pure_graph.py):
  current_accumulated_cost, current_max_cost_usd, and current_pricing
  ContextVars carry per-node budget state from PureLangGraph into
  LLMAgent. Set before node.execute() via _set_budget_context_for_node,
  reset in finally blocks via _reset_budget_context.

Reviewer fixes (rui.hu #80):
  - Move cost accumulation inside try block in terminal streaming branch
    to prevent ContextVar leak (was set after finally reset).
  - Standardize log precision to $%.6f across all budget messages.
  - Remove orphaned 'already exhausted' step (criterion unreachable).
  - Add dedicated streaming budget enforcement scenario.
  - Remove redundant = None default on _reset_budget_context pricing_token.

ISSUES CLOSED: #76
2026-07-12 19:51:39 +01:00
..