Claude Haiku 5.5 (effort default (no --effort flag) · thinking on) on Add HTTP byte-range support to a stdlib file server (single, suffix, multipart, 416, If-Range, HEAD)

[
 {
  "duration_api_ms": 41778,
  "stop_reason": "end_turn",
  "session_id": "[REDACTED]",
  "total_cost_usd": 0.00959487,
  "usage": {
   "input_tokens": 10,
   "cache_creation_input_tokens": 18143,
   "cache_read_input_tokens": 105277,
   "output_tokens": 9825,
   "output_tokens_details": {
    "thinking_tokens": 4524
   },
   "server_tool_use": {
    "web_search_requests": 0,
    "web_fetch_requests": 0
   },
   "service_tier": "standard",
   "cache_creation": {
    "ephemeral_1h_input_tokens": 18143,
    "ephemeral_5m_input_tokens": 0
   },
   "inference_geo": "global",
   "iterations": [
    {
     "input_tokens": 2,
     "output_tokens": 832,
     "cache_read_input_tokens": 27370,
     "cache_creation_input_tokens": 3312,
     "cache_creation": {
      "ephemeral_5m_input_tokens": 0,
      "ephemeral_1h_input_tokens": 3312
     },
     "type": "message"
    }
   ],
   "speed": "standard",
   "fallback_credit": null
  },
  "modelUsage": {
   "claude-haiku-5-5": {
    "inputTokens": 10,
    "outputTokens": 9825,
    "cacheReadInputTokens": 105277,
    "cacheCreationInputTokens": 18143,
    "webSearchRequests": 0,
    "costUSD": 0.00959487,
    "contextWindow": 1000000,
    "maxOutputTokens": 128000,
    "thinkingTokens": 4524,
    "canonicalModel": "claude-haiku-5-5",
    "provider": "firstParty",
    "costBasis": "list"
   }
  },
  "permission_denials": [],
  "terminal_reason": "completed",
  "fast_mode_state": "off",
  "fast_mode_disabled_reason": "sdk_opt_in_required",
  "subagent_stats": {
   "spawned": 0,
   "requested": {
    "background": 0,
    "foreground": 0,
    "unset": 0
   },
   "started_in_background": 0,
   "max_depth": 0,
   "spawned_by_subagents": 0,
   "completed": 0,
   "failed": 0,
   "killed": {
    "parent": 0,
    "user": 0,
    "system": 0
   },
   "refused": {
    "depth_limit": 0,
    "concurrency_limit": 0,
    "budget": 0
   },
   "by_type": {}
  },
  "safety_stops": 0,
  "is_error": false,
  "num_turns": 5,
  "subtype": "success",
  "api_error_status": null,
  "result": "`server.py` now implements `RANGES.md`. I tested it against each rule with `http.client`, and `public/` is byte-identical to the original.\n\nThe only failing check was a mistake in my test, not the server. I sent `bytes= 2-3 , 5-6 `, which has two satisfiable specs, so the correct response is the multipart 206. The server returned that, and I had expected a single-range 206.\n\n**What changed**\n- Every file response (200, 206, 416) carries `Accept-Ranges: bytes` and a quoted ETag: the first 16 hex characters of the file's SHA-256.\n- `Range` parsing follows rule 3 strictly: the `bytes=` prefix is exact, specs are digits only, spaces and tabs are allowed around each spec, and an empty spec, `first > last`, or `-` alone causes the header to be ignored (200).\n- Unsatisfiable specs are dropped and the rest are clamped. No satisfiable spec gives 416 with `Content-Range: bytes */size` and an empty body.\n- One satisfiable spec gives a 206 with the file's content type. Two or more give the `G02BOUNDARY` multipart body, with parts in request order and no merging.\n- `If-Range` is honoured only when it exactly matches the ETag. Otherwise the response is a full 200. It has no effect without a `Range` header.\n- `HEAD` gets the same status and headers as `GET` with no body. 404s are unchanged.\n\n**Choices I made where the spec was silent**\n- A 416 has no `Content-Type`, since the spec does not name one.\n- If a request has more than one `Range` header, the server uses the first one.\n- The `bytes=` unit is matched case-sensitively, following \"values exactly\".\n\nTests were run from a scratch script in `/tmp`, not in the work directory. The original `server.py` is backed up at `/tmp/server.orig.py`.",
  "ttft_ms": 1521,
  "type": "result",
  "duration_ms": 43107,
  "uuid": "[REDACTED]",
  "ttft_stream_ms": 1318,
  "time_to_request_ms": 304,
  "first_content_frame_ms": 1318,
  "queued_turn_count": 0,
  "result_index": 0
 }
]