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common : implement common_schema internal representation for JSON schemas (#28736)

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* common : implement common_schema types

* common : implement a json schema optimizer

* common : reduce optimizations

* common : refactor json-schema-to-grammar to use common_schema

* common : use common_trie

* common/schema : implement type/kind resolution

* cont : cleanup

* cont : remove common_chat_tool_parameters

* cont : simplify schema resolution

* cont : pass common_schema through the json-schema-to-grammar builder

* cont : cleanup

* cont : move enums under common_schema and add type enum

* cont : reduce test cases

* cont : clean up

* cont : clean up

* refactor : rename common_schema_parse to common_schema_from_json

* tests : fix gcc dangling-reference warning in test-json-schema

* tests : take the schema label as const char * to satisfy gcc dangling-reference

* refactor : rename common_schema_builder parse_* methods to build_*

* cont : fix may_be_string

* cont : properly handle empty tool parameters

* cont : add tests for empty $ref

* cont : remove dead code

* cont : update docs

* cont : make "{}" mean any object for json_object as well

* cont : restore (min|max)Length to imply string type

* cont : rename common_schema to common_chat_schema
This commit is contained in:
Aldehir Rojas
2026-09-12 16:14:50 -05:00
committed by GitHub
parent ae9afff8d2
commit acecd56032
45 changed files with 1738 additions and 1933 deletions
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tools/completion/README.md
+3 -3
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@@ -216,8 +216,8 @@ llama-completion.exe -m models\gemma-1.1-7b-it.Q4_K_M.gguf --ignore-eos -n -1
| `-l, --logit-bias TOKEN_ID(+/-)BIAS` | modifies the likelihood of token appearing in the completion,<br/>i.e. `--logit-bias 15043+1` to increase likelihood of token ' Hello',<br/>or `--logit-bias 15043-1` to decrease likelihood of token ' Hello' |
| `--grammar GRAMMAR` | BNF-like grammar to constrain generations (see samples in grammars/ dir) |
| `--grammar-file FNAME` | file to read grammar from |
| `-j, --json-schema SCHEMA` | JSON schema to constrain generations (https://json-schema.org/), e.g. `{}` for any JSON object<br/>For schemas w/ external $refs, use --grammar + example/json_schema_to_grammar.py instead |
| `-jf, --json-schema-file FILE` | File containing a JSON schema to constrain generations (https://json-schema.org/), e.g. `{}` for any JSON object<br/>For schemas w/ external $refs, use --grammar + example/json_schema_to_grammar.py instead |
| `-j, --json-schema SCHEMA` | JSON schema to constrain generations (https://json-schema.org/), e.g. `{"type": "object"}` for any JSON object |
| `-jf, --json-schema-file FILE` | File containing a JSON schema to constrain generations (https://json-schema.org/), e.g. `{"type": "object"}` for any JSON object |
| `-bs, --backend-sampling` | enable backend sampling (experimental) (default: disabled)<br/>(env: LLAMA_ARG_BACKEND_SAMPLING) |
@@ -556,7 +556,7 @@ These options help improve the performance and memory usage of the LLaMA models.
- `--grammar GRAMMAR`, `--grammar-file FILE`: Specify a grammar (defined inline or in a file) to constrain model output to a specific format. For example, you could force the model to output JSON or to speak only in emojis. See the [GBNF guide](../../grammars/README.md) for details on the syntax.
- `--json-schema SCHEMA`: Specify a [JSON schema](https://json-schema.org/) to constrain model output to (e.g. `{}` for any JSON object, or `{"items": {"type": "string", "minLength": 10, "maxLength": 100}, "minItems": 10}` for a JSON array of strings with size constraints). If a schema uses external `$ref`s, you should use `--grammar "$( python examples/json_schema_to_grammar.py myschema.json )"` instead.
- `--json-schema SCHEMA`: Specify a [JSON schema](https://json-schema.org/) to constrain model output to (e.g. `{"type": "object"}` for any JSON object, or `{"items": {"type": "string", "minLength": 10, "maxLength": 100}, "minItems": 10}` for a JSON array of strings with size constraints).
### Quantization