| 1 | #!/usr/bin/env python3 |
| 2 | """Pre-flight cost estimation for the analyze workflow. |
| 3 | |
| 4 | Estimates total input tokens from assembled context files, calculates |
| 5 | expected cost, and aborts (exit 1) if the estimate exceeds the hard cap. |
| 6 | """ |
| 7 | |
| 8 | from __future__ import annotations |
| 9 | |
| 10 | import argparse |
| 11 | import sys |
| 12 | from pathlib import Path |
| 13 | |
| 14 | from scripts.model_pricing import ( |
| 15 | MODEL_RATES, |
| 16 | estimate_cost_usd, |
| 17 | ) |
| 18 | from scripts.track_token_usage import ( |
| 19 | estimate_tokens_from_path, |
| 20 | ) |
| 21 | |
| 22 | DEFAULT_OUTPUT_TOKENS = 2000 |
| 23 | DEFAULT_MODEL = "copilot-default" |
| 24 | HARD_CAP_USD = 1.00 |
| 25 | |
| 26 | |
| 27 | def parse_args(argv: list[str] | None = None) -> argparse.Namespace: |
| 28 | parser = argparse.ArgumentParser( |
| 29 | description="Pre-flight token cost estimation. Aborts if estimate exceeds hard cap." |
| 30 | ) |
| 31 | parser.add_argument( |
| 32 | "--context-files", |
| 33 | nargs="+", |
| 34 | type=Path, |
| 35 | required=True, |
| 36 | help="Paths to context files that will be sent as input (raw JSON, prompt, wisdom, etc.).", |
| 37 | ) |
| 38 | parser.add_argument( |
| 39 | "--model", |
| 40 | default=DEFAULT_MODEL, |
| 41 | help="Model or rate profile name for cost lookup (default: copilot-default).", |
| 42 | ) |
| 43 | parser.add_argument( |
| 44 | "--output-tokens", |
| 45 | type=int, |
| 46 | default=DEFAULT_OUTPUT_TOKENS, |
| 47 | help=f"Estimated output tokens (default: {DEFAULT_OUTPUT_TOKENS}).", |
| 48 | ) |
| 49 | parser.add_argument( |
| 50 | "--hard-cap", |
| 51 | type=float, |
| 52 | default=HARD_CAP_USD, |
| 53 | help=f"Maximum allowed estimated cost in USD (default: {HARD_CAP_USD}).", |
| 54 | ) |
| 55 | return parser.parse_args(argv) |
| 56 | |
| 57 | |
| 58 | def estimate_input_tokens(context_files: list[Path]) -> int: |
| 59 | """Sum estimated tokens across all context files.""" |
| 60 | return sum(estimate_tokens_from_path(p) for p in context_files) |
| 61 | |
| 62 | |
| 63 | def main(argv: list[str] | None = None) -> int: |
| 64 | args = parse_args(argv) |
| 65 | |
| 66 | input_tokens = estimate_input_tokens(args.context_files) |
| 67 | output_tokens = args.output_tokens |
| 68 | total_tokens = input_tokens + output_tokens |
| 69 | cost = estimate_cost_usd(args.model, input_tokens, output_tokens) |
| 70 | |
| 71 | if cost is None: |
| 72 | print( |
| 73 | f"::warning::Unknown model '{args.model}' — cannot estimate cost. " |
| 74 | f"Known models: {', '.join(sorted(MODEL_RATES.keys()))}", |
| 75 | file=sys.stderr, |
| 76 | ) |
| 77 | return 1 |
| 78 | |
| 79 | print( |
| 80 | f"::notice::Pre-flight estimate: {input_tokens} input + {output_tokens} output " |
| 81 | f"= {total_tokens} tokens → ${cost:.4f} (cap: ${args.hard_cap:.2f}, model: {args.model})" |
| 82 | ) |
| 83 | |
| 84 | if cost > args.hard_cap: |
| 85 | print( |
| 86 | f"::error::Estimated cost ${cost:.4f} exceeds hard cap ${args.hard_cap:.2f}. Aborting.", |
| 87 | file=sys.stderr, |
| 88 | ) |
| 89 | return 1 |
| 90 | |
| 91 | return 0 |
| 92 | |
| 93 | |
| 94 | if __name__ == "__main__": |
| 95 | raise SystemExit(main()) |