0.67.0

Breaking Changes

Default Behavior Changes

• Auto input-type CSV fallback is now conditional - When --input-file-type auto is used, infer_input_type() previously treated any YAML parse failure as CSV data. It now falls back to CSV only when the text looks like CSV (non-empty lines with consistent, non-zero comma counts). Inputs that were previously inferred as csv — including malformed JSON/YAML and ragged CSV with inconsistent column counts (e.g. id,name,tel\n1,taro\n) — will no longer be inferred as CSV. (#3536)
• GitHub Action extra-args no longer undergoes shell expansion - The Action previously appended extra-args directly into the shell command (datamodel-codegen "${ARGS[@]}" ${{ inputs.extra-args }}), so the value was subject to word-splitting, glob expansion, variable expansion, and command substitution. It is now tokenized with Python's shlex.split. Workflows that relied on shell features inside extra-args (globs like *.json, variables like $HOME, or command substitution $(...)) will no longer have them expanded and must pass literal, individually-quoted arguments instead. (#3542)
• GitHub Action extras input is now validated against a whitelist - Previously any value passed to the extras input was accepted and injected into the pip install spec. It is now validated against the fixed set graphql, http, validation, ruff, all; any other value now fails the install step with ::error::Unsupported extras value: <value> instead of being passed through. Workflows passing extras values outside this set will now error. (#3542)

Error Handling Changes

• Malformed auto-detected input now raises an error instead of silently inferring CSV - Under auto inference, input that fails YAML parsing and does not look like CSV now raises Error rather than falling back to CSV and attempting generation. The error message was also expanded to include the underlying YAML parser error, e.g. Can't infer input file type from the input data. YAML parser error: <Type>: <detail>. Please specify the input file type explicitly with --input-file-type option. Workflows depending on the old blanket-CSV fallback must now pass --input-file-type csv explicitly. (#3536)

What's Changed

• Update CHANGELOG for 0.66.3 by @dcg-generated-docs[bot] in #3515
• Update release benchmark data by @dcg-generated-docs[bot] in #3516
• Update supported data type docs by @koxudaxi in #3517
• Render CLI option relationships in docs by @koxudaxi in #3518
• Generate tested docs examples by @koxudaxi in #3519
• Add CLI option topic metadata foundation by @koxudaxi in #3522
• Sync README support lists by @koxudaxi in #3523
• Add CLI reference recipe sections by @koxudaxi in #3520
• Sync generated docs by @dcg-generated-docs[bot] in #3524
• Add Playground option documentation links by @koxudaxi in #3521
• Sync generated docs by @dcg-generated-docs[bot] in #3525
• Add CLI topic pages by @koxudaxi in #3526
• Add aggregate docs check by @koxudaxi in #3527
• Expand tested docs examples by @koxudaxi in #3528
• Add schema format guide tables by @koxudaxi in #3529
• Add benchmark scenario guidance by @koxudaxi in #3531
• Sync README quick-start recipes by @koxudaxi in #3532
• Sync generated docs by @dcg-generated-docs[bot] in #3534
• Add CLI relationship summary by @koxudaxi in #3530
• Cover parsed source cache parity by @koxudaxi in #3535
• Fix auto CSV fallback by @koxudaxi in #3536
• Cover input error messages by @koxudaxi in #3537
• Refresh Docker image by @koxudaxi in #3538
• Gate release publishing by @koxudaxi in #3539
• Harden GitHub Action by @koxudaxi in #3542
• Document Docker image and action usage by @koxudaxi in #3544
• Add Docker metadata coverage by @koxudaxi in #3548
• Gate unused type ignores by @koxudaxi in #3547
• Assert parsed source cache population by @koxudaxi in #3546
• Harden action cache key by @koxudaxi in #3545
• Cover de facto public symbols by @koxudaxi in #3550
• Correct experimental feature metadata by @koxudaxi in #3551
• Add generation determinism guard by @koxudaxi in #3549

Full Changelog: 0.66.3...0.67.0