Changelog

All notable user-visible changes to psi are documented here. Format follows Keep a Changelog. Version scheme: MAJOR.MINOR.PATCH where PATCH = git rev-list HEAD --count at release time.

Unreleased

0.1.2088 - 2026-05-18

Added

• Workflow session steps now accept an optional :temperature field (range [0.0, 2.0]). When set, the value is threaded through to the AI provider request. When absent, the provider default applies. Applies to both :type :session steps and :type :llm judge specs.
• psi-tool now supports action: "mutate" for invoking registered runtime mutations with structured success/error reports.
• The live graph now exposes explicit session-surface attrs: :psi.runtime-session/active-id, :psi.runtime-session/list, :psi.runtime-session/count, :psi.persisted-session/list, and :psi.persisted-session/list-all.
• The live graph now exposes :psi.agent-session/context-session-summaries, a compact session inventory for operational selection, alongside the explicit runtime-session root attrs.
• New edit-clj extension and tool: structural Clojure/EDN form replacement by S-expression equality, preserving surrounding file formatting and supporting optional line-range filtering.

Fixed

• psi-tool mutation execution now preserves an explicitly supplied business :session-id for session-scoped mutations like psi.extension/close-session, instead of silently retargeting them to the invoking session.
• Workflow IR compilation errors now identify the failing step by name and index, state the violated constraint in plain language, and enumerate all errors — replacing the single opaque "Workflow definition does not compile to execution-valid canonical IR" message.

0.1.2067 - 2026-05-12

Added

• logprobs extension with logprobs/perplexity deterministic operation: calculates perplexity of the most recent logprob-bearing reply for a session, available to workflows via invoke steps.
• gh-issue-refine workflow: the discover step is now a deterministic :invoke step backed by the new psi/github extension, replacing a non-deterministic AI builder-delegate step. Issue selection is fully determined by the gh CLI and selection rules — no AI sampling occurs during issue discovery.
• Major improvements to workflows - branching, deterministic steps, session controls

Fixed

• Custom model providers whose selected session model stores :provider as a string now resolve provider-scoped auth, request options, and runtime model lookup consistently instead of falling back to built-in provider auth behavior.
• Local :openai-completions models now project /thinking off into chat_template_kwargs.enable_thinking=false, allowing local OpenAI-compatible servers to disable hidden reasoning through the existing thinking-level control.

0.1.2049 - 2026-05-02

Added

• Extensions can close sessions via close-session and close-session-tree mutations.
• Helper sessions from auto-session-name are now automatically closed after use.
• Model API HTTP requests now honor standard proxy environment variables (HTTPS_PROXY, HTTP_PROXY, ALL_PROXY); see Configuration and Custom providers.

Fixed

• Auto session naming now falls back across ranked helper models when a preferred helper model is unavailable or yields no usable title.
• Emacs: typing before RPC connects no longer has a newline injected mid-draft when the footer first updates.
• Emacs: footer now updates correctly after connect (was filtered due to missing session-id in payload).
• Emacs: footer content no longer appears inside submitted prompts on longer sessions (root cause: re-entrant projection upsert triggered by undo-outer-limit on large buffers).
• Emacs: re-focusing the psi window when transport is ready no longer incorrectly resets the footer to "connecting..." (was causing prompt submission to not clear input or add to chat).
• Emacs: footer/updated events from the external event loop now carry session-id so they pass the session-match guard.
• TUI startup banner model line now reflects the canonical current session model.
• Custom Anthropic-compatible model providers now use the selected provider's configured auth and base URL instead of requiring built-in Anthropic credentials.

0.1.2034 - 2026-04-29

Added

• M-r searches prompt input history via completing-read (see Emacs UI).
• Session-first workflow authoring now supports explicit step input/reference sources, projections, and preload context (see Workflow docs).

Fixed

• TUI text surfaces now use an explicit width policy so narrow terminals wrap startup banner metadata, transcript user/thinking text, and expanded tool body text predictably, while compact tool headers truncate intentionally (see TUI width policy).

0.1.2026 - 2026-04-27

Added

• Initial Version

Changed

Fixed