coglet breaking changes

0.19.0

1 breaking change, first published April 27, 2026.

• Default changed
  Cog now generates prediction schemas statically from type annotations instead of importing the predictor at build time. To keep the old behavior if you hit issues, set COG_LEGACY_SCHEMA=1. github.com

0.18.0

2 breaking changes, first published April 16, 2026.

• Renamed cog run
  cog run still works as a hidden alias that prints a deprecation warning. Update scripts to use cog exec. github.com
• Behavior changed record_metric
  record_metric() rejects names that break the naming rules, and predict_time and the cog. prefix are reserved. Rename any metrics that use them. github.com

0.17.0-alpha2

5 breaking changes, first published March 25, 2026.

• Removed
  Support for Python versions below 3.10 was ended in this pre-release. github.com
• Removed cog migrate
  The cog migrate command, pipelines functionality, and --x-localimage experimental flag were removed. github.com
• Removed coglet-alpha
  The option to select the coglet-alpha build was removed. github.com
• Removed fast.monobase build system
  The deprecated fast/monobase build system was removed; builds must use the current build path. github.com
• Behavior changed cog.BaseModel
  cog.BaseModel is now built on native Python dataclasses rather than Pydantic, which can change validation and serialization behavior. github.com

0.8.0-beta1

1 breaking change, first published March 25, 2026.

• Behavior changed
  Cog's supported Python versions were updated, so projects on older Python versions may no longer work. github.com

0.7.0-beta1

2 breaking changes, first published March 25, 2026.

• Removed QueueWorker
  The QueueWorker class was renamed to Director. Code importing QueueWorker must switch to Director. github.com
• Behavior changed
  Prediction and shutdown behavior changed, including SIGKILL on shutdown and JSON logging in production. github.com

0.6.0

1 breaking change, first published March 25, 2026.

• Behavior changed
  The HTTP API was updated to use the new Worker class and respond like Replicate, which changes HTTP responses for existing clients. github.com

Check your code

These are the changes. To see which of them reach your code, scan a public repository, or have your coding agent call check_code with your manifest or lockfile over MCP. The API reads every change in every version, not only the newest. On Team and up, a fix pull request opens for the changes that reach a connected repository. Nothing merges or deploys.