### Describe the bug

Open

#86 opened on Jun 27, 2026 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 25/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Stale
Tech stack: github, shell
Domain: cli, devtools, performance

Research direction

No source files, tests, or reproduction steps are named. Start by confirming whether this belongs in github/copilot-cli and reproduce the high CPU behavior in Copilot CLI v1.0.65, comparing it with v1.0.61 while reviewing the supplied logs. Done means identifying and resolving the regression, with verification that the review command no longer remains idle at high CPU.

Written by the indexing model from the issue text.

Description

Describe the bug

╭─╮╭─╮
╰─╯╰─╯ Copilot v1.0.65 uses AI.
█ ▘▝ █ /experimental
▔▔▔▔

● No copilot-instructions.md found. Run /init to generate.

● Tip: /remote
└ Toggle remote control from GitHub web and mobile

❯ review last commit

◉ Working esc cancel Claude Sonnet 4.6 · medium · (0%)

Then it use a lot of cpu and does nothing

PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND

2668312 foob 20 0 11.2g 227904 90216 S 62.6 0.2 2:17.65 MainThread

tested v1.0.61 and it works.

Affected version

No response

Steps to reproduce the behavior

No response

Expected behavior

No response

Additional context

2026-06-27T09:22:40.299Z [DEBUG] Using GitHub OAuth token for Copilot API
2026-06-27T09:22:40.299Z [DEBUG] Creating copilot-client for integration ID copilot-developer-cli with token authentication. User-agent: copilot/1.0.65 (client/github/cli linux v24.16.0) term/unknown
2026-06-27T09:22:40.300Z [DEBUG] Successfully listed 30 models
2026-06-27T09:22:40.300Z [DEBUG] Listed models: [claude-opus-4.6,Claude Opus 4.6], [claude-opus-4.7,Claude Opus 4.7], [claude-sonnet-4.6,Claude Sonnet 4.6], [gpt-5.3-codex,GPT-5.3-Codex], [gpt-5.4-mini,GPT-5.4 mini], [gpt-5.4-nano,GPT-5.4 nano], [gpt-5.4,GPT-5.4], [gpt-5.5,GPT-5.5], [gpt-5-mini,GPT-5 mini], [gpt-4o-mini-2024-07-18,GPT-4o mini], [gpt-4o-2024-11-20,GPT-4o], [gpt-4o-2024-08-06,GPT-4o], [text-embedding-3-small,Embedding V3 small], [text-embedding-3-small-inference,Embedding V3 small (Inference)], [claude-sonnet-4.5,Claude Sonnet 4.5], [claude-opus-4.5,Claude Opus 4.5], [claude-haiku-4.5,Claude Haiku 4.5], [gemini-2.5-pro,Gemini 2.5 Pro], [gpt-4.1-2025-04-14,GPT-4.1], [gpt-41-copilot,GPT-4.1 Copilot], [gpt-3.5-turbo-0613,GPT 3.5 Turbo], [gpt-4,GPT 4], [gpt-4-0613,GPT 4], [gpt-4o-2024-05-13,GPT-4o], [gpt-4-o-preview,GPT-4o], [gpt-4.1,GPT-4.1], [gpt-3.5-turbo,GPT 3.5 Turbo], [gpt-4o-mini,GPT-4o mini], [gpt-4o,GPT-4o], [text-embedding-ada-002,Embedding V2 Ada]
2026-06-27T09:22:40.301Z [DEBUG] Applied model capabilities override: {"family":"claude-sonnet-4.6","limits":{"max_context_window_tokens":264000,"max_non_streaming_output_tokens":16000,"max_output_tokens":64000,"max_prompt_tokens":200000,"vision":{"max_prompt_image_size":3145728,"max_prompt_images":5,"supported_media_types":["image/jpeg","image/png","image/webp","image/gif","application/pdf"]}},"object":"model_capabilities","supports":{"adaptive_thinking":true,"max_thinking_budget":32000,"min_thinking_budget":1024,"parallel_tool_calls":true,"reasoning_effort":["low","medium","high","max"],"streaming":true,"structured_outputs":true,"tool_calls":true},"tokenizer":"o200k_base","type":"chat"}
2026-06-27T09:22:40.301Z [DEBUG] Got model info: {
  "billing": {
    "restricted_to": [
      "pro",
      "pro_plus",
      "individual_trial",
      "business",
      "enterprise",
      "max"
    ],
    "token_prices": {
      "batch_size": 1000000,
      "default": {
        "cache_read_price": 30,
        "cache_write_price": 375,
        "input_price": 300,
        "max_prompt_tokens": 200000,
        "output_price": 1500
      },
      "long_context": {
        "cache_read_price": 30,
        "cache_write_price": 375,
        "input_price": 300,
        "max_prompt_tokens": 936000,
        "output_price": 1500
      }
    }
  },
  "capabilities": {
    "family": "claude-sonnet-4.6",
    "limits": {
      "max_context_window_tokens": 264000,
      "max_non_streaming_output_tokens": 16000,
      "max_output_tokens": 64000,
      "max_prompt_tokens": 200000,
      "vision": {
        "max_prompt_image_size": 3145728,
        "max_prompt_images": 5,
        "supported_media_types": [
          "image/jpeg",
          "image/png",
          "image/webp",
          "image/gif",
          "application/pdf"
        ]
      }
    },
    "object": "model_capabilities",
    "supports": {
      "adaptive_thinking": true,
      "max_thinking_budget": 32000,
      "min_thinking_budget": 1024,
      "parallel_tool_calls": true,
      "reasoning_effort": [
        "low",
        "medium",
        "high",
        "max"
      ],
      "streaming": true,
      "structured_outputs": true,
      "tool_calls": true
    },
    "tokenizer": "o200k_base",
    "type": "chat"
  },
  "id": "claude-sonnet-4.6",
  "is_chat_default": false,
  "is_chat_fallback": false,
  "model_picker_category": "versatile",
  "model_picker_enabled": true,
  "model_picker_price_category": "medium",
  "name": "Claude Sonnet 4.6",
  "object": "model",
  "policy": {
    "state": "enabled",
    "terms": "Enable access to the latest Claude Sonnet 4.6 model from Anthropic. [Learn more about how GitHub Copilot serves Claude Sonnet 4.6](https://gh.io/copilot-claude-opus)."
  },
  "preview": false,
  "supported_endpoints": [
    "/chat/completions",
    "/v1/messages"
  ],
  "vendor": "Anthropic",
  "version": "claude-sonnet-4.6"
}
2026-06-27T09:22:48.972Z [DEBUG] [Octokit] request
2026-06-27T09:22:48.975Z [DEBUG] [rust:log] starting new connection 'Some("api.github.com")' {"log.target":"reqwest::connect","log.module_path":"reqwest::connect","log.file":"/home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/reqwest-0.13.4/src/connect.rs","log.line":929}
2026-06-27T09:22:48.975Z [DEBUG] [rust:hyper_util::client::legacy::connect::http] connecting to 140.82.116.5:443
2026-06-27T09:22:48.978Z [DEBUG] [rust:hyper_util::client::legacy::connect::http] connected to 140.82.116.5:443
2026-06-27T09:22:49.414Z [DEBUG] [rust:hyper_util::client::legacy::pool] pooling idle connection for ("https", api.github.com)
2026-06-27T09:22:49.414Z [INFO] [Octokit] POST /graphql - 200 with id 163E:128A50:5DA289C:5F79229:6A3F9669 in 442ms
2026-06-27T09:23:03.590Z [DEBUG] [rust:runtime::api_telemetry_queue] [telemetry-queue] Flushing 3 events (20252 B → 2828 B gzipped)
2026-06-27T09:23:03.591Z [DEBUG] [rust:hyper_util::client::legacy::pool] reuse idle connection for ("https", telemetry.business.githubcopilot.com)
2026-06-27T09:23:03.881Z [DEBUG] [rust:hyper_util::client::legacy::pool] pooling idle connection for ("https", telemetry.business.githubcopilot.com)
2026-06-27T09:23:48.957Z [DEBUG] [Octokit] request
2026-06-27T09:23:48.960Z [DEBUG] [rust:log] starting new connection 'Some("api.github.com")' {"log.target":"reqwest::connect","log.module_path":"reqwest::connect","log.file":"/home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/reqwest-0.13.4/src/connect.rs","log.line":929}
2026-06-27T09:23:48.960Z [DEBUG] [rust:hyper_util::client::legacy::connect::http] connecting to 140.82.116.5:443
2026-06-27T09:23:48.963Z [DEBUG] [rust:hyper_util::client::legacy::connect::http] connected to 140.82.116.5:443
2026-06-27T09:23:49.523Z [DEBUG] [rust:hyper_util::client::legacy::pool] pooling idle connection for ("https", api.github.com)
2026-06-27T09:23:49.523Z [INFO] [Octokit] POST /graphql - 200 with id 23FC:262C01:63B4C40:6588B29:6A3F96A4 in 566ms
2026-06-27T09:24:48.957Z [DEBUG] [Octokit] request
2026-06-27T09:24:48.967Z [DEBUG] [rust:log] starting new connection 'Some("api.github.com")' {"log.target":"reqwest::connect","log.module_path":"reqwest::connect","log.file":"/home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/reqwest-0.13.4/src/connect.rs","log.line":929}
2026-06-27T09:24:48.968Z [DEBUG] [rust:hyper_util::client::legacy::connect::http] connecting to 140.82.116.5:443
2026-06-27T09:24:48.968Z [DEBUG] [rust:hyper_util::client::legacy::connect::http] connected to 140.82.116.5:443
2026-06-27T09:24:49.375Z [DEBUG] [rust:hyper_util::client::legacy::pool] pooling idle connection for ("https", api.github.com)
2026-06-27T09:24:49.375Z [INFO] [Octokit] POST /graphql - 200 with id 203F:157E5D:66003B4:67D5059:6A3F96E1 in 418ms
2026-06-27T09:25:48.963Z [DEBUG] [Octokit] request
2026-06-27T09:25:48.966Z [DEBUG] [rust:log] starting new connection 'Some("api.github.com")' {"log.target":"reqwest::connect","log.module_path":"reqwest::connect","log.file":"/home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/reqwest-0.13.4/src/connect.rs","log.line":929}
2026-06-27T09:25:48.966Z [DEBUG] [rust:hyper_util::client::legacy::connect::http] connecting to 140.82.116.6:443
2026-06-27T09:25:48.969Z [DEBUG] [rust:hyper_util::client::legacy::connect::http] connected to 140.82.116.6:443
2026-06-27T09:25:49.425Z [DEBUG] [rust:hyper_util::client::legacy::pool] pooling idle connection for ("https", api.github.com)
2026-06-27T09:25:49.426Z [INFO] [Octokit] POST /graphql - 200 with id 3B3F:262C01:63D327D:65A7DCA:6A3F971D in 462ms

Originally posted by @wangvisual in https://github.com/github/copilot-cli/issues/3962

Dominant language: Shell
Stars: 176
Forks: 43
PR merge metrics: No merged PRs in 30d

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