{"name":"CLAUDE_CODE_LEGACY_BUNDLE","slug":"claude-code-legacy-bundle","family":"env","title":"Environment variables","noun":"environment variable","description":"Set CLAUDE_CODE_LEGACY_BUNDLE to true to go back to the old single-file build shape.","description_source":"entry","described_by":{"version":"2.1.242","anchor":"claude-code-legacy-bundle-restores-the-old-non-split-bundle-"},"presence":{"first_seen":"2.1.242","removed_in":null,"in_current_build":true,"newest_mined":"2.1.309","builds":57,"mined_builds":150,"first_cited":{"version":"2.1.242","released_at":"2026-08-24 19:16:14","spans":4}},"aliases":[],"entries":[{"version":"2.1.285","anchor":"cloud-sessions-dir-syncfirst-upload-and-folder-seed-paths","heading":"Cloud sessions no longer sync or seed your folder, and CLAUDE_CODE_DIR_SYNC_ENGINE is ignored","line":"Starting a cloud session no longer uses folder sync or seeding, `CLAUDE_CODE_DIR_SYNC_ENGINE` is not read, and bundle upload remains","released_at":"2026-09-29 17:32:09","reason":"found in this entry's text"},{"version":"2.1.285","anchor":"claude-code-legacy-bundle-retired-on-macos-and-linux","heading":"CLAUDE_CODE_LEGACY_BUNDLE no longer works on macOS and Linux","line":"On macOS and Linux, `CLAUDE_CODE_LEGACY_BUNDLE` is now ignored with a warning and the default upload method runs; only Windows keeps it","released_at":"2026-09-29 17:32:09","reason":"found in this entry's text, named in this entry"},{"version":"2.1.285","anchor":"claude-code-legacy-bundle-dropped-from-a-bundle-env-list","heading":"CLAUDE_CODE_LEGACY_BUNDLE dropped from a list of cloud bundling variables","line":"One list of bundling environment variables now holds only `CCR_ENABLE_BUNDLE` and `CCR_FORCE_BUNDLE`","released_at":"2026-09-29 17:32:09","reason":"found in this entry's text, named in this entry"},{"version":"2.1.281","anchor":"claude-code-legacy-bundle-is-ignored-when-a-project-settings","heading":"CLAUDE_CODE_LEGACY_BUNDLE is ignored when a project settings file sets it","line":"CLAUDE_CODE_LEGACY_BUNDLE is ignored with a warning when it comes from a settings file rather than your launch environment or own settings","released_at":"2026-09-23 17:01:17","reason":"found in this entry's text, named in this entry"},{"version":"2.1.242","anchor":"claude-code-legacy-bundle-restores-the-old-non-split-bundle-","heading":"CLAUDE_CODE_LEGACY_BUNDLE restores the old non-split bundle shape","line":"Set CLAUDE_CODE_LEGACY_BUNDLE to true to go back to the old single-file build shape.","released_at":"2026-08-24 19:16:14","reason":"named in this entry, found in this entry's text"}],"entries_total":5,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"CLAUDE_CODE_3P_PROBE_WROTE_HAIKU_DEFAULT","slug":"claude-code-3p-probe-wrote-haiku-default","description":"If your cloud account cannot use a model, Claude Code can step down to the next one; `CLAUDE_CODE_DISABLE_MODEL_ACCESS_FALLBACK` turns this off"},{"name":"CLAUDE_CODE_3P_PROBE_WROTE_OPUS_DEFAULT","slug":"claude-code-3p-probe-wrote-opus-default","description":"Internal marker on third-party providers. When Claude Code itself writes `ANTHROPIC_DEFAULT_OPUS_MODEL` into its environment (the model availability probe on Bedrock, Vertex or Mantle, or a move down the model fallback ladder), it sets this variable to the same model ID. An `ANTHROPIC_DEFAULT_OPUS_MODEL` equal to it is treated as Claude Code's own choice rather than a user pin: it does not count as pinned, the probe does not skip it, and the fallback ladder may move it."},{"name":"CLAUDE_CODE_3P_PROBE_WROTE_SONNET_DEFAULT","slug":"claude-code-3p-probe-wrote-sonnet-default","description":"On third-party providers, Haiku model names are no longer skipped by the check that sets up the Sonnet default model"},{"name":"CLAUDE_CODE_3P_SEEDED_OPUS_DEFAULT","slug":"claude-code-3p-seeded-opus-default","description":"If your cloud account cannot use a model, Claude Code can step down to the next one; `CLAUDE_CODE_DISABLE_MODEL_ACCESS_FALLBACK` turns this off"},{"name":"CLAUDE_CODE_3P_SEEDED_SONNET_DEFAULT","slug":"claude-code-3p-seeded-sonnet-default","description":"If your cloud account cannot use a model, Claude Code can step down to the next one; `CLAUDE_CODE_DISABLE_MODEL_ACCESS_FALLBACK` turns this off"},{"name":"CLAUDE_CODE_ACCESSIBILITY","slug":"claude-code-accessibility","description":"Set to `1` to keep the native terminal cursor visible and disable the inverted-text cursor indicator. Allows screen magnifiers like macOS Zoom to track cursor position"},{"name":"CLAUDE_CODE_ACCOUNT_TAGGED_ID","slug":"claude-code-account-tagged-id","description":"Overrides the `user.account_id` attribute Claude Code attaches to its OpenTelemetry data. It applies only when an account UUID is known and `OTEL_METRICS_INCLUDE_ACCOUNT_UUID` is not turned off (default on); when unset or empty, `user.account_id` is derived from the account UUID as a tagged ID of the form `user_01...`."},{"name":"CLAUDE_CODE_ACCOUNT_UUID","slug":"claude-code-account-uuid","description":"The device bridge is skipped entirely when the host's account UUID doesn't match the stored one."},{"name":"CLAUDE_CODE_ACT_DONT_REDERIVE","slug":"claude-code-act-dont-rederive","description":"Three existing feature gates moved position; their defaults are unchanged."},{"name":"CLAUDE_CODE_ACTION","slug":"claude-code-action","description":"Marks a run as coming from the Claude Code GitHub Action. A truthy value (`1`, `true`, `yes` or `on`) makes Claude Code set `CLAUDE_CODE_ENTRYPOINT` to `claude-code-github-action`, but only when `CLAUDE_CODE_ENTRYPOINT` is not already set and the command is not `claude mcp serve`. It is also reported as `isClaudeCodeAction` in the environment details attached to telemetry."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/env\/claude-code-legacy-bundle","family_url":"https:\/\/changelogs.core-directive.com\/reference\/env.json"}