AI coding assistant with read, bash, edit, write tools
Pi is a minimal terminal coding harness. Adapt pi to your workflows, not the other way around, without having to fork and modify pi internals. Extend it with TypeScript Extensions, Skills, Prompt Templates, and Themes. Put your extensions, skills, prompt templates, and themes in Pi Packages and share them with others via npm or git.
Pi ships with powerful defaults but skips features like sub agents and plan mode. Instead, you can ask pi to build what you want or install a third party pi package that matches your workflow.
Pi runs in four modes: interactive, print or JSON, RPC for process integration, and an SDK for embedding in your own apps. See openclaw/openclaw for a real-world SDK integration.
Claude Fable 5 - Claude Fable 5 is now available on the Anthropic and Amazon Bedrock providers, with adaptive thinking and xhigh effort support.
Prompt template defaults - Prompt templates can use default positional arguments such as ${1:-7} for optional values. See Prompt Template Arguments.
Configurable project trust defaults - defaultProjectTrust lets users choose whether unresolved project trust asks, always trusts, or never trusts by default, and extensions can inspect effective trust decisions. See Project Trust and ctx.isProjectTrusted().
Natural extension autocomplete triggers - Extension autocomplete providers can declare trigger characters such as # or $ so suggestions open without slash-command prefixes. See Autocomplete Providers.
Added
Added default-value expansion for prompt template positional arguments, e.g. ${1:-7} (#5553 by @dannote).
Added areExperimentalFeaturesEnabled feature guard to allow users to opt in to early features (#5547 by @vegarsti).
Added ctx.isProjectTrusted() for extensions to observe the effective project trust decision, including temporary trust decisions (#5523).
Added a global defaultProjectTrust setting to choose whether unresolved project trust asks, always trusts, or never trusts by default.
Added extension autocomplete trigger character support for ctx.ui.addAutocompleteProvider() wrappers (#4703).
Added Claude Fable 5 model support inherited from @earendil-works/pi-ai for the Anthropic and Amazon Bedrock providers, with adaptive thinking and xhigh effort support.
Fixed
Fixed inherited Amazon Bedrock inference profile ARN region resolution to prefer the ARN's embedded region over AWS_REGION (#5527 by @AJM10565).
Fixed inherited IME hardware cursor positioning while slash-command autocomplete is visible (#5283 by @smoosex).
Fixed inherited z.ai thinking-off requests to send the provider's thinking: { type: "disabled" } compatibility parameter (#5330).
Fixed inherited OpenCode completions model metadata to send explicit maxTokens as max_tokens (#5331).
Fixed inherited Moonshot Kimi thinking-off requests to send the provider's thinking: { type: "disabled" } compatibility parameter (#5531).
Fixed inherited Azure GPT-5.4 and GPT-5.5 context window metadata to 1,050,000 tokens, matching Azure Foundry deployments instead of OpenAI's 272k limit (#5559).
Fixed inherited OpenAI and Azure GPT-5 Pro maxTokens metadata to 128,000, correcting an upstream value that duplicated the input sub-limit as the output limit (#5559).
Fixed inherited prompt history navigation to restore the current draft when returning from history browsing (#5494).
Fixed inherited wrapping for mixed Latin and CJK text so unspaced CJK runs can break at grapheme boundaries without leaving large trailing gaps (#5495).
Fixed extension OAuth login prompts to keep previous submitted prompt rows stable instead of mirroring the active input value (#5433).
Fixed /reload to apply updated steeringMode and followUpMode settings to the current session (#5377).
Fixed invalid models.json syntax to skip startup config migrations and report the normal file-path-aware models error instead of a raw JSON parse stack trace (#5418).
Fixed GitHub release notes and interactive changelog links to resolve package-relative documentation URLs correctly (#5516).
Fixed CLI help and version output, including plain redirected --help/--version output and simplified list/config help text.
Fixed /new from ephemeral sessions to keep the new session ephemeral instead of persisting it by default (#5045).
Clarified custom model docs that name and modelOverrides.name do not replace model IDs in the footer or primary model lists (#4841).
