# copilot-cli v1.0.83 — 1.0.83

- Product: copilot-cli (https://whatsnew.fyi/product/copilot-cli)
- Vendor: GitHub
- Date: 2026-09-04
- Version: v1.0.83
- Original notes: https://github.com/github/copilot-cli/releases/tag/v1.0.83
- Permalink: https://whatsnew.fyi/product/copilot-cli/releases/v1.0.83

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **added** — Show running Copilot sessions in the Windows 11 taskbar with live hover status cards
- **added** — Add Client ID Metadata Document (CIMD) support for MCP OAuth sign-in
- **added** — Custom agents can list several models in model, tried in order until one is available to you, and model-policy: required keeps model changes on that list
- **added** — Add support for claude-fable-5.1
- **added** — Add Recent, Created, Name, and classic None sorting to the split Sessions sidebar, with the selected order saved across restarts
- **added** — Enterprise admins can pin sign-in to approved GitHub organizations with the forceLoginOrgs managed setting
- **added** — Add automatic HTTPS proxy mTLS client certificate support for model and web requests
- **added** — Allow local network in /sandbox to reach localhost on macOS and Linux for sandboxed commands
- **fixed** — Detect the herdr terminal multiplexer instead of mistaking it for tmux, so the Kitty keyboard protocol, color scheme following, terminal progress, /copy and notifications work in herdr panes
- **fixed** — A session lock that is re-entered on the same thread now fails with a reported error instead of freezing the CLI
- **fixed** — Kerberos proxy authentication reconnects when the initial challenge answers with Connection: close
- **fixed** — Sandboxed gh commands now authenticate as the account configured for the repository instead of the Copilot CLI login
- **fixed** — MCP tools remain callable after MCP server restarts
- **fixed** — Sandboxed file tools now read the same developer-tool paths as sandboxed shell commands, including token-bearing registry config such as ~/.npmrc
- **fixed** — Stopping a timed-out shell command now lets queued messages run and sessions return to idle
- **fixed** — A follow-up prompt typed while autopilot is running no longer disappears from the timeline
- **fixed** — MCP servers configured by your agent stay available after built-in sub-agent turns
- **fixed** — Anthropic sessions continue after temporary fallback instead of failing on invalid thinking signatures
- **fixed** — Long-running sessions on Linux return freed memory to the system instead of holding gigabytes of it
- **fixed** — Enterprise-denied MCP servers can no longer start before the managed allow/deny policy resolves; server startup now waits for the managed-settings fetch instead of racing it

2026-09-04

- Show running Copilot sessions in the Windows 11 taskbar with live hover status cards
- Add Client ID Metadata Document (CIMD) support for MCP OAuth sign-in
- Custom agents can list several models in `model`, tried in order until one is available to you, and `model-policy: required` keeps model changes on that list
- Adding support for claude-fable-5.1
- Add Recent, Created, Name, and classic None sorting to the split Sessions sidebar, with the selected order saved across restarts
- Enterprise admins can pin sign-in to approved GitHub organizations with the forceLoginOrgs managed setting
- Add automatic HTTPS proxy mTLS client certificate support for model and web requests
- Detect the herdr terminal multiplexer instead of mistaking it for tmux, so the Kitty keyboard protocol, color scheme following, terminal progress, `/copy` and notifications work in herdr panes
- A session lock that is re-entered on the same thread now fails with a reported error instead of freezing the CLI.
- Kerberos proxy authentication reconnects when the initial challenge answers with `Connection: close`
- Sandboxed `gh` commands now authenticate as the account configured for the repository instead of the Copilot CLI login
- MCP tools remain callable after MCP server restarts
- Sandboxed file tools now read the same developer-tool paths as sandboxed shell commands, including token-bearing registry config such as ~/.npmrc; set sandbox.allowDevToolAccess to false to turn these grants off
- Stopping a timed-out shell command now lets queued messages run and sessions return to idle
- A follow-up prompt typed while autopilot is running no longer disappears from the timeline
- Restart provides clearer update guidance when automatic restart cannot be completed
- MCP servers configured by your agent stay available after built-in sub-agent turns.
- Anthropic sessions continue after temporary fallback instead of failing on invalid thinking signatures
- Long-running sessions on Linux return freed memory to the system instead of holding gigabytes of it
- Enterprise-denied MCP servers can no longer start before the managed allow/deny policy resolves; server startup now waits for the managed-settings fetch instead of racing it
- Host-provided plugin customizations can be read without redundant path permission prompts
- A relative `--add-dir` or `--plugin-dir` path now resolves against the session's working directory under `--resume=<id>` and `--worktree`, instead of the directory the CLI was launched from. Relative values are also resolved after `-C` is applied, so `-C` no longer has to precede either option on the command line
- MCP servers contributed by a plugin are no longer labelled "User" in the MCP dashboard, and a server from a bundled plugin is now shown as built-in and names the plugin it came from.
- The newest line of output stays visible above the input box instead of hiding behind it, except while a prompt is pinned to the top of the transcript
- Exporting a resumed session with --share or --share-gist writes the whole transcript instead of only the latest run
- On macOS and Linux, sandboxed commands can no longer reach services running on your machine. On macOS this also blocks a server the command itself starts on 127.0.0.1, so test suites that bind a local port will fail; turn on Allow local network in /sandbox to reach localhost again.
- Linux sandboxing now needs slirp4netns, nsenter, iptables, ip6tables, iptables-restore and ip6tables-restore on PATH. Install them if sandboxed commands start failing to launch.
- CLI starts without the interrupted-session restore prompt by default.
- Resuming large sessions keeps the input prompt responsive sooner.
- Linux sandboxes now restrict network egress to the configured proxy; proxy mode requires slirp4netns, util-linux 2.35+, iptables, and /dev/net/tun access
- `/mcp config` and the MCP add/edit/authenticate forms now open in the plugins dashboard instead of a separate MCP manager, so closing

_[Truncated at 4000 characters — full notes: https://github.com/github/copilot-cli/releases/tag/v1.0.83]_