Pi — The Cyber Toolchain

Pi v0.84.2

Fri, 14 Aug 2026 10:14:32 GMT

Pi v0.84.2 adds fullscreen transcript search, configurable default tools, a per-run theme flag, and new extension/gateway APIs. • Adds `--use-theme ` flag to choose an interactive theme for a single run without overwriting saved settings. • Adds `defaultTools` setting for configuring the initial built-in tool selection globally or per project. • Adds `expandPromptTemplates` option to the extension pi.sendUserMessage() API for explicitly dispatching commands and expanding skills and prompt templates. • Adds createGatewayBindingFetch() for routing Cloudflare AI Gateway requests through a Workers AI binding without an API token. • Adds `AssistantMessage.endTurn` to preserve OpenAI Codex's terminal `end_turn` signal for diagnostics. • Adds `PI_EXPERIMENTAL=1` to enable experimental strict JSON-schema constrained sampling for the default `read`, `bash`, `edit`, and `write` tools. • Adds `PI_TUI_ESC_TIMEOUT` environment variable to tune Escape-key detection latency for high-latency terminals (e.g. over SSH). • Adds fullscreen transcript search via `Ctrl+Shift+F` with incremental match highlighting, configurable search match theme colors, and next/previous navigation with `Enter`/`Ctrl+G` and `Shift+Enter`/`Ctrl+Shift+G`. • Adds a fullscreen exit output setting to choose between printing the full final transcript or only a session resume hint. • Adds unbound single-line transcript scrolling actions for fullscreen mode. • Documents the `AI_AGENT=pi` process marker and how it differs from `PI_CODING_AGENT=true`. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.84.1

Fri, 07 Aug 2026 06:07:00 GMT

Pi v0.84.1 adds `pi auth check` for credential preflight, Qwen Token Plan Individual provider, and `terminate` support for blocked extension tool_call events. • Adds `pi auth check` subcommand to verify provider or model credentials before a run, with optional resolved credential output. • Adds `QWEN_TOKEN_PLAN_API_KEY` environment variable and Qwen Token Plan Individual as a built-in provider with its subscription model catalog. • Adds `terminate` support to blocked extension `tool_call` event handlers, allowing all-terminating batches to skip the automatic follow-up model call. • Adds double-click word selection, granularity-aware drag selection, and triple-click paragraph selection in TUI fullscreen mode. • Adds unbound half-page transcript scrolling actions for TUI fullscreen mode, configurable via keybindings. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.84.0

Thu, 06 Aug 2026 11:07:05 GMT

Pi v0.84.0 adds fullscreen TUI, `AGENTS.override.md` per-directory context, Baseten provider, custom `samplingParams`, and a remote-session client API. • Adds opt-in `Ctrl+P`/`Ctrl+N` prompt history navigation in the TUI editor. Breaking changes: • The `ModelsStreamTransforms` interface is renamed to `ModelsRequestTransforms`; extensions referencing `ModelsStreamTransforms` will break. • JSON and RPC `message_update` events now emit only `assistantMessageEvent` deltas; the cumulative `message` and `assistantMessageEvent.partial` fields are removed. Clients must assemble deltas between `message_start` and `message_end`. • ModelRegistry.getApiKeyAndHeaders() now returns `ProviderHeaders` with `string | null` values; extensions that inspect returned headers must handle `null`. • ModelRegistry.refresh() now accepts `ModelsRefreshOptions` and returns `ModelsRefreshResult` instead of discarding cancellation and provider errors. • ModelRuntime.setRuntimeApiKey() now accepts auth cancellation options instead of catalog refresh options; callers must call refresh({ providers: [providerId], signal }) separately when remote freshness is required. • Config-form extension OAuth refreshToken(credentials, signal) callbacks are now required to accept and honor a concrete abort signal. • Dynamic provider refresh context store access is replaced with the read-only `context.stored` snapshot and generation-checked context.publish() transaction; handwritten Provider.refreshModels() implementations using context.store.read() / context.store.write() must migrate. • The inherited pi-agent-core harness session model is replaced with the v4 lane-based `Session`, `SessionStorage`, and `SessionRepo` APIs; code using the old session model will break. • The legacy JSONL and in-memory repository APIs are removed; code must migrate to `JsonlSessionRepo` or `InMemorySessionRepo` from pi-agent-core v4. • Custom harness file-system implementations must now provide a FileSystem.renameFile() operation for atomic JSONL publication. • `RemoteSession.sessions` no longer exposes runtime phase, model, thinking, attachment, or lock state; that data is now only available from acquired `SessionSnapshot` values. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.83.0

Wed, 29 Jul 2026 22:30:33 GMT

Pi v0.83.0 adds credential export commands, headless OpenRouter login, and Claude Opus 5 via GitHub Copilot. • Adds `pi auth print-api-key` and `pi auth print-bearer-token` commands to export configured credentials (with automatic OAuth refresh and minimum-validity enforcement) for use by external clients. • Enables headless OpenRouter login by accepting a manually pasted redirect URL or authorization code when the loopback callback is unavailable (e.g., over SSH). • Adds Claude Opus 5 support through the GitHub Copilot provider, with adaptive thinking and a 1 million-token context window. • Adds per-request `fetch` injection for supported text and image provider transports. • Adds the `"pending"` stop reason for partial streaming messages in the custom provider stream pattern. Breaking changes: • TypeBox aliases upgraded to 1.3.7, removing deprecated APIs `Type.Base`, `Type.Awaited`, `Type.Promise`, `Type.AsyncIterator`, `Type.Iterator`, `Type.Options`, and `Value.Mutate` — extensions using any of these APIs must migrate to supported TypeBox APIs. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.82.1

Sat, 25 Jul 2026 12:47:23 GMT

Pi v0.82.1 adds Claude Opus 5 support, bearer auth for Anthropic-compatible gateways, and faster model catalog revalidation. • Adds Claude Opus 5 model support on Anthropic and Amazon Bedrock, including adaptive thinking (with `xhigh` level), inference profiles, and prompt caching. • Adds `ANTHROPIC_AUTH_TOKEN` bearer authentication for Anthropic-compatible gateways that require `Authorization: Bearer` headers, covering compaction and branch summaries. • Speeds up pi.dev model catalog refreshes with `If-None-Match` conditional requests, so unchanged provider catalogs return a `304` instead of a full download. • Exposes the `outputPad` setting to custom message renderers via the Extensions API. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.82.0

Fri, 24 Jul 2026 06:12:16 GMT

Pi v0.82.0 adds constrained tool sampling, OAuth login for OpenRouter/Kimi Code, and streaming bash RPC events. • Adds `Tool.constrainedSampling` supporting strict JSON Schema (`prefer`/`require`) and OpenAI Lark/regex grammar variants across OpenAI, Anthropic, Amazon Bedrock, Google Gemini, and Mistral providers. • Adds model capability flags `supportsGrammarTools` and `supportsStrictTools` to gate constrained sampling requests to models that support them. • Adds OAuth PKCE login for OpenRouter via `/login`, automatically minting a user-controlled API key without manual configuration. • Adds OAuth device-authorization login for Kimi Code subscriptions via `/login`, with automatic token refresh. • Exposes `PI_SESSION_ID`, `PI_SESSION_FILE`, `PI_PROVIDER`, `PI_MODEL`, and `PI_REASONING_LEVEL` as environment variables inside commands run by built-in and factory-created bash tools. • Adds streaming `bash_execution_update` RPC events for direct bash commands, correlated with request IDs. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.81.1

Tue, 21 Jul 2026 16:45:17 GMT

Pi v0.81.1 adds verifiable, checksummed release source archives for reproducible standalone binary builds. • Adds deterministic, checksummed source archives to GitHub releases with documented instructions for rebuilding standalone binaries, supporting supply-chain verification. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.81.0

Tue, 21 Jul 2026 13:34:03 GMT

Pi v0.81.0 adds local llama.cpp model management, full provider extensions, Qwen Token Plan support, and expanded usage accounting. • Adds built-in llama.cpp router support via `/login` connection setup and `/llama` subcommand for Hugging Face model search, download, explicit load/unload, and live progress. • Enables extensions to register complete pi-ai providers with native authentication, model refresh, filtering, and custom streaming behavior. • Adds Qwen Token Plan and Qwen Token Plan China as built-in providers with regional endpoints and API-key authentication. • Expands usage accounting to persist tool, compaction, and branch-summary usage in session totals and statistics. • Adds `get_available_thinking_levels` RPC command and RpcClient.getAvailableThinkingLevels() method for querying model thinking-level options. • Exports message and tool execution lifecycle event types from the package root for consumer use. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.80.9

Thu, 16 Jul 2026 17:23:36 GMT

Pi v0.80.9 adds Kimi K3 support with deferred tool loading across five providers and switches xAI default to Grok 4.5. • Adds Kimi K3 model support across Kimi Coding, Moonshot AI, Moonshot AI China, OpenRouter, and Vercel AI Gateway. • Adds Kimi deferred tool loading for progressive, extension-driven tool activation via Kimi's native protocol. • Changes the default xAI model to Grok 4.5 and updates xAI login to use a prefilled device-authorization link labeled 'Sign in with SuperGrok or X Premium'. Breaking changes: • Grok 3, Grok 3 Fast, Grok 4.20 variants, and Grok Code Fast 1 have been removed from the built-in xAI model catalog — any configuration referencing these models will break. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.80.8

Thu, 16 Jul 2026 14:40:41 GMT

Pi v0.80.8 adds unified model/auth runtime, live catalog refresh, and xAI Grok 4.5 with device-code OAuth. • Adds `ModelRuntime` as the canonical async SDK facade, centralizing model configuration, provider authentication, and dynamic provider catalogs. • Adds `pi update --models` command to force an immediate model catalog refresh without updating pi or extensions. • Adds `/model` live background refresh of configured providers, updating the selector with partial results as they arrive. • Adds provider-owned `/login` discovery, surfacing ambient auth status and informational links directly from registered providers. • Adds xAI device-code OAuth login so users can authenticate to xAI interactively without an API key. • Adds Grok 4.5 OpenAI Responses support with selectable low, medium, and high thinking levels. • Adds file-backed dynamic model catalogs (`models-store.json`), per-provider pi.dev catalog overlays, and Radius gateway support. • Adds refreshModels(context) extension hook for dynamic model discovery with optional provider-controlled persistence. Breaking changes: • The `CreateAgentSessionOptions.authStorage` and `modelRegistry` SDK options are replaced by the async `modelRuntime` option; `AuthStorage` and its storage backends are no longer exported — use `ModelRuntime`, a custom pi-ai `CredentialStore`, or readStoredCredential() instead. • ModelRuntime.getAll(), find(), getSnapshot(), and getAuthOptions() are removed; use pi-ai `Models` methods getModels(), getModel(), getProviders(), and checkAuth() directly. • Request-auth assembly via ModelRegistry.getApiKeyAndHeaders() is replaced by ModelRuntime.getAuth(); passing a provider ID returns provider-scoped auth, passing a model also resolves built-in, `models.json`, and extension model headers. • ModelRegistry.refresh() changed from synchronous `void` to `Promise`; extensions must `await` it before making synchronous registry reads. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.80.7

Tue, 14 Jul 2026 16:41:53 GMT

Pi v0.80.7 adds cache-friendly dynamic tool loading, toolChoice for OpenAI/Codex Responses, Fable 5 xhigh/max thinking, and a Ctrl+X message copy shortcut. • Adds cache-friendly dynamic tool loading: extensions can inject tools during execution while Anthropic and OpenAI Responses models preserve prompt-cache prefixes. • Adds `toolChoice` support for OpenAI and Codex Responses, including required and named tool selection. • Adds native `xhigh` and `max` thinking levels for Claude Fable 5 across all generated provider catalogs. • Adds `Ctrl+X` shortcut to copy the last assistant message in the transcript, or the selected message in `/tree`. Breaking changes: • The `compat.sendSessionIdHeader` flag has been removed from `models.json` for `openai-responses` models. Replace `sendSessionIdHeader: false` with `sessionAffinityFormat: "openai-nosession"` in your `models.json`; the new field also accepts `"openai"` and `"openrouter"`. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.80.6

Thu, 09 Jul 2026 23:22:08 GMT

Pi v0.80.6 adds a `max` thinking level for GPT-5.6/Claude and input-token pricing tiers for long-context cost accounting. • Adds `max` thinking level (above `xhigh`) for GPT-5.6 and adaptive Claude models, available via CLI, SDK, RPC, and model selection; custom themes can define `thinkingMax`. • Adds request-wide input-token pricing tiers for accurate long-context cost accounting (e.g. GPT-5.4/5.5/5.6 rates), configurable in `models.json` and `modelOverrides`. • Supports `~` (home directory) expansion in the `shellPath` setting. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.80.3

Tue, 30 Jun 2026 20:34:32 GMT

Pi v0.80.3 adds Claude Sonnet 5, Azure Foundry endpoints, new RPC session APIs, and configurable editor/padding settings. • Adds Anthropic Claude Sonnet 5 support via Anthropic-compatible and Bedrock provider catalogs, with adaptive thinking enabled. • Supports modern Microsoft Azure Foundry endpoint URLs for the Azure OpenAI Responses provider. • New `get_entries` and `get_tree` RPC commands let clients inspect session entries and tree snapshots programmatically. • New `./rpc-entry` package export enables launching Pi directly in RPC mode. • New `session_info_changed` extension event lets extensions observe session name changes. • New `externalEditor` setting configures a preferred editor for Ctrl+G, overriding `$VISUAL`/`$EDITOR` fallbacks. • New `outputPad` setting controls horizontal padding for user messages, assistant messages, and thinking blocks. • Adds `Usage.reasoning` token counts for providers that report reasoning/thinking token usage. • Changes the default OpenAI model to `gpt-5.5`. Breaking changes: • The default OpenAI model is changed to `gpt-5.5`. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.80.0

Tue, 23 Jun 2026 17:32:23 GMT

Pi v0.80.0 adds Ctrl+J newline keybinding and migrates pi-ai's global API to a new compat entrypoint. • Adds `Ctrl+J` as a default newline keybinding alongside `Shift+Enter`. • Moves pi-ai's legacy global API (`stream`/`complete`/`completeSimple`, `getModel`/`getModels`/`getProviders`, `registerApiProvider`, `getEnvApiKey`, etc.) from the `@earendil-works/pi-ai` root to `@earendil-works/pi-ai/compat`; extension sources typechecking against pi-ai's published types should update imports accordingly or migrate to the new createModels()/provider-factory API. • Removes the `@earendil-works/pi-ai/base` and `@earendil-works/pi-agent-core/base` selective-provider entrypoints; use the root packages with explicit `Models` provider factories instead. Breaking changes: • The `@earendil-works/pi-ai/base` and `@earendil-works/pi-agent-core/base` entrypoints have been removed; use the root packages with explicit `Models` provider factories instead. • The global API (`stream`/`complete`/`completeSimple`, `getModel`/`getModels`/`getProviders`, `registerApiProvider`, `getEnvApiKey`, etc.) has been moved off the `@earendil-works/pi-ai` root entrypoint to `@earendil-works/pi-ai/compat`; extension sources that typecheck against pi-ai's published types must switch those imports to `@earendil-works/pi-ai/compat` or migrate to the new createModels()/provider-factory API. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.79.10

Mon, 22 Jun 2026 09:16:23 GMT

Extension compaction events gain reason/willRetry context; pi update now pins the exact checked version. • Adds `reason` and `willRetry` metadata to `session_before_compact` and `session_compact` extension events, enabling extensions to distinguish manual `/compact`, threshold auto-compaction, and overflow retry flows. • Updates `pi update` to install the exact version returned by the Pi update check and surface the changelog URL in update notices, making upgrade behavior predictable. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.79.9

Sat, 20 Jun 2026 20:17:09 GMT

Pi v0.79.9 adds chat-template thinking support for vLLM/Hugging Face providers like DeepSeek and improves GLM-5.2 routing. • Adds chat-template thinking support: OpenAI-compatible custom providers can now map Pi thinking levels into `chat_template_kwargs`, enabling vLLM/Hugging Face models such as DeepSeek to use provider-native thinking controls. • Enables GLM-5.2 `xhigh` reasoning on OpenRouter and corrects Fireworks routing to use the OpenAI-compatible Chat Completions endpoint with `reasoning_effort` support. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.79.8

Fri, 19 Jun 2026 07:55:20 GMT

Pi v0.79.8 adds Mistral prompt caching, OpenRouter Fusion alias, and post-compaction token estimates. • Adds Mistral prompt caching using the Pi session ID as the cache key, with cached-token usage and cost accounting surfaced per session. • Adds `openrouter/fusion` as a built-in OpenRouter model alias for direct use as a provider target. • Adds estimated post-compaction token counts to compact results and compaction events, letting clients display approximate context reduction. • Adds `@earendil-works/pi-ai/base` and `@earendil-works/pi-agent-core/base` entry points for SDK users who need selective provider registration to trim bundle size. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi

Pi v0.79.7

Thu, 18 Jun 2026 16:23:49 GMT

Pi v0.79.7 adds automatic light/dark theme switching, scoped update control, and new extension API exports. • Adds automatic theme mode in `/settings` to assign separate light and dark themes that follow terminal color-scheme changes. • Changes `pi update` to update only pi by default; new `pi update --all` updates pi and all extensions together. • Exports `generateDiffString`, `generateUnifiedPatch`, and `EditDiffResult` from the public API for extensions that produce edit-style diffs. • Enables inline image rendering in Warp terminals via automatic Kitty graphics protocol detection. Breaking changes: • The `pi update` command now updates only pi itself; the previous behaviour of updating pi and packages together now requires `pi update --all`. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/pi