release aidev SIG 4/5

Pi v0.79.1: Claude Fable 5 support, project trust defaults, extension autocomplete triggers

Pi adds Claude Fable 5 on Anthropic and Bedrock providers (adaptive thinking, xhigh effort), makes project trust behavior configurable, and lets extension autocomplete providers open without a slash-command prefix. A long list of inherited provider and UI fixes round out the release.

PUBLISHED2026-06-09
OBSERVED2026-08-21
AGE2mo
SOURCES1

New capabilities

  • Claude Fable 5 available on Anthropic and Amazon Bedrock providers, with adaptive thinking and xhigh effort support (inherited from @earendil-works/pi-ai).
  • Prompt templates support default positional arguments such as ${1:-7} for optional values. (#5553)
  • New defaultProjectTrust setting: unresolved project-trust asks default to ask / always-trust / never-trust; extensions can inspect the effective decision via ctx.isProjectTrusted(). (#5523)
  • Extension autocomplete providers can declare trigger characters (e.g. # or $) so suggestions open without slash-command prefixes. (#4703)
  • Added areExperimentalFeaturesEnabled feature guard to opt in to early features. (#5547)

Fixed (selected)

  • Bedrock inference profile ARN region resolution prefers the ARN's embedded region over AWS_REGION. (#5527)
  • Azure GPT-5.4/5.5 context window corrected to 1,050,000 tokens; GPT-5 Pro maxTokens corrected to 128k. (#5559)
  • Various thinking-off compatibility params for z.ai / Moonshot Kimi; Azure OpenAI Responses disables server-side storage. (#5330, #5531, #5530)
  • IME hardware cursor positioning with slash-command autocomplete visible; mixed Latin/CJK text wrapping at grapheme boundaries. (#5283, #5495)
featuremodel-supportfix

COMMUNITY

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