rpotato v0.52.1 - Managed llama.cpp Structured-Chat Recovery

Release date: 2026-07-29

This patch restores the default TUI conversation path on the managed
llama.cpp backend. The v0.52.0 structured answer schema requested a grammar
repetition larger than the pinned compiler accepts, causing even a simple
greeting to fail with HTTP 400 before generation.

Included

• Removes the grammar-level answer.maxLength repetition while preserving the
  runtime's independent 16 KiB visible-answer validation.
• Rejects unsupported string, array, and object repetition bounds before a
  generation lifecycle starts or a request reaches the backend.
• Traverses only JSON Schema subschema positions so output properties named
  maxLength, minItems, or similar keywords remain valid.
• Covers the verified 1,999/2,000 managed-grammar boundary, property-name
  collisions, the production turn schema, and the native structured TUI
  request.
• Requires a real pinned llama-server and installed supported model smoke
  whenever request-body, response-format, schema, or chat-template contracts
  change.

Compatibility and boundaries

• Existing models, sessions, projectors, web tools, browser restrictions, and
  public commands remain compatible.
• The application still rejects visible structured answers larger than 16 KiB;
  only the incompatible grammar repetition was removed.
• GitHub Releases remains the only supported binary distribution channel.