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2026-06-15anthropic credentials in oauth providers (eg copilot)t
2026-06-15model registry sync via models.devt
2026-06-15Add Codex Responses support and session debuggingt
Teach provider config and auth resolution about the Codex Responses dialect, including user-facing `style = "openai_responses"` with `dialect = "codex"`. Serialize and parse Responses traffic with provider-specific reasoning replay, assistant phase metadata, and robust function-call assembly keyed by `output_index` so streamed tool inputs survive proxy quirks and empty terminal payloads. Also persist thinking origins and message metadata across sessions, add the Anthropic interleaved-thinking header switch, write per-session debug logs, and improve the TUI and scripts for inspecting tool output and session costs.
2026-06-15fix a pointer-casting bugt
2026-06-15auth: flatten [auth.<name>] config + ${...} substitutiont
Collapse the auth schema: infer `type` from keys, replace key/key_env_var with a single `key` (resolved via substitution), flatten the exchange to flat `exchange_*` keys, and drop the auth-level headers tables in favor of reusing the provider's `extra_headers` on the auth HTTP calls. Add `${sibling}` and `${env:VAR}` substitution over auth values (GitHub Enterprise = set `domain`). Restore api_key-empty → provider-drop. Update default config, docs, and tests.
2026-06-15auth: openai_responses provider for Codex subscription (Tier 2)t
Add the OpenAI Responses API wire dialect (openai_responses APIStyle + OpenAIResponsesConfig), a request serializer (instructions/input items, flat function tools, reasoning, store:false, include encrypted reasoning), and a streaming state machine over the typed response.* SSE events mapping to the shared block model. Wire dispatch, buildProviderConfig, the C-ABI free switch, and the reasoning selectors. Ship a commented Codex example in the default config. Implemented from the Responses API docs + the open-source Codex client and covered by fixture tests; live verification against a ChatGPT plan is still required (documented).
2026-06-15auth: turn-time resolution in the TUI (inline login + 401 retry)t
Resolve the active provider's auth before each turn via the AuthManager, rendering an inline device-code prompt when login is needed, and force a single refresh/exchange retry on a provider auth failure. Wire the manager through RunOptions from main.zig.
2026-06-15auth: CLI auth manager + `panto auth` subcommandst
Add src/auth_manager.zig (turn-time resolution: load→login→refresh→exchange→ build credential, patch live config) and `panto auth status|login|logout` subcommands with a line-based device-code presenter. Add config_file.loadFromString.
2026-06-15auth: HTTP helper + token storage (C3, C4)t
Add libpanto http_helper (non-streaming request/response over the global client, plus dotted-JSON-path readers) and token persistence in auth.zig (load/save/delete TokenSet under an embedder-chosen auth dir, owner-only files). Add $PANTO_HOME/auth to the panto_home layout.
2026-06-15auth: clean-break named [auth.<name>] sessions + extra_headerst
Replace provider-level api_key/api_key_env_var with named auth sessions: providers now reference `auth = "<name>"` and credentials live under `[auth.<name>]`. Adds the libpanto auth type surface (AuthConfig, TokenSet, ResolvedCredential), a Header type and provider `extra_headers`, and rewires the CLI config loader (parse [auth.<name>], require auth=, providers always survive, eager api_key resolution). Updates the shipped default config.
2026-06-12improve errors: retries, surfacing provider errors to the usert
2026-06-12anthropic prompt cachingt
2026-06-12add latest output into footer context window displayt
2026-06-12fuzzy selectors for models and reasoning levelst
2026-06-12Replace Footer FPS display with model dimension and dim stylingt
Remove setFrameTime() method and fps-related rendering from Footer. Replace with setModel() to display model name with dim styling. Update all Footer tests accordingly, adjusting line counts and expectations for new layout with top/bottom rules wrapping content. Remove reverse video styling from footer.
2026-06-11libpanto API fixest
- FSJSONLStore: don't require `cwd`, instead panto CLI provides it in the session metadata - Lua: expose the `SessionStore` interface and the `FSJSONLStore` and `NullStore` implementations - C: use idiomatic `const char *` for incoming strings - C: expose the `FSJSONLStore` and `NullStore` implementations
2026-06-10fix anthropic thinking effort json placementt
2026-06-10fix: eliminate scrollback-clearing flash when streaming with expanded tool ↵t
output The root cause was a two-part bug: 1. Engine slot management (tui_engine.zig): The app rebuilds its full component list on every new transcript entry. The old approach drained every slot then re-added them all, resetting every component's render baseline. When earlier content had scrolled into native scrollback (viewport_top > 0), the engine's viewport-escape rule escalated any cut above the viewport top to a scrollback-clearing full redraw — the visible flash on every streamed block while a tool call was expanded. Fix: replace drain+rebuild with syncComponents(), which reconciles the live slot list in place by finding the longest common prefix and suffix (matched by component pointer). Prefix and suffix slots keep their baselines verbatim; only the changed region in the middle gets new empty slots. A pure insertion (the dominant case: a new transcript entry appended just before the pinned input+footer suffix) stays on the differential path with no clear. A structural change (slot replaced or removed) sets force_full for correctness. 2. RenderCache dirty signal (tui_component.zig): firstLineChanged() was returning the retained changed_from diff index even when the cache was clean. A first-paint store records changed_from == 0, so a clean but previously-rendered component was pegging the differential cut to line 0 on every subsequent frame, making unchanged slots above the insertion point drag the cut all the way up. Fix: when the cache is clean, firstLineChanged() returns null unconditionally. The recorded changed_from is now internal render bookkeeping only, not a live signal. Additional changes: - ToolUse.collapsed_tail_lines raised from 5 to 8 lines. - ToolUse collapsed-view test updated to use 12 output lines and collapsed_tail_lines symbolically so the numbers self-document. - tui_app.zig: override-slot test comment and assertion clarified to reflect that the override owns the slot pointer (not just renders it), and the SWAPPED-AT-DETAILS render check replaced with a pointer-equality check. - lua_event_bridge.zig: minor related fixes. - New tests: syncComponents middle-insertion no-clear, syncComponents structural removal forces full, syncComponents override swap; streaming expanded-tools no-clear regression test in tui_app.
2026-06-10strip ANSI color sequences from tool output for displayt
2026-06-10Add addUserText helper; update all call sitest
Conversation.addUserMessage now takes a []ContentBlock (symmetric with addAssistantMessage). Introduce a thin addUserText wrapper in agent.zig for the plain-text case and update every call site in agent.zig and anthropic_messages_json.zig accordingly.
2026-06-10expose `panto` to extensions as a require()able module, not a globalt
2026-06-09accurately count message widtht
2026-06-09color themet
2026-06-09fix streaming renderingt
2026-06-09anthropic thinkingt
2026-06-09finalize cursor on quitt
2026-06-09event lifecyclet
2026-06-08keybinding fixest
2026-06-08proper terminal capability negotiationt
determine support for the kitty protocol and then pick output sequences accordingly. tested on ghostty (supports kitty) and tmux-in-ghostty (tmux does not support kitty protocol) with shift+enter as newline.
2026-06-08Replace print CLIRenderer with differential TUI enginet
Implement TUI Phase 1: a raw-mode terminal, differential render engine, pinned input box + footer, and component model wired into the libpanto event stream. Adds foundation modules (theme, key, component, input, terminal), the render engine, components, and the app loop; removes the old print CLIRenderer and driveTurn REPL from main.zig. Also removes scratch status reports (tui-p1/, progress.md) for the now completed work.
2026-06-07further libpanto public API name cleanupt
2026-06-07Sync Agent/Stream internals to public names; alias Streamt
Push the API-shaping we'd done in the public facade down into the internal types, collapsing the wrappers: - Stream: rename phase->state, Phase->State; underscore-prefix the internal fields (_agent/_queue/_response/_start/_persisted/_pending_error). state is the one intended-public field. public.zig now aliases Stream; run returns *Stream. - Agent compaction: pure transform compact()->private _compactInPlace; compactAndPersist()->compact() (the public name, persists). - Agent system prompt: addSystemMessage(text,mode) split into addSystemMessage(text) + setSystemPrompt(text) over a private _persistSystemMessage. - UserMessage moved off Agent to module scope. - Underscore-prefix pure-internal Agent fields: _open_stream_fn, _auto_compacted, _retry_prng. The Agent facade is now pure 1:1 forwarders; it stays a wrapper only because init heap-pins the inner (copyable, move-safe handle) and conversation()/ sessionId() are accessors. Conversation and Stream are plain aliases.
2026-06-07Alias Conversation instead of facading it; merge addAssistantMessaget
A facade that forwards every method 1:1 is worse than paring the real type down to the intended surface and aliasing it. conversation.Conversation's interface is already the public surface we want (init/deinit, the add*/replace* builders, and messages/allocator as plain data fields), so public.zig now aliases it straight through and Agent.conversation() returns a borrowed *Conversation for in-place surgery. Drops the ConversationData alias and the pointer-wrapper. Merged addAssistantMessageWithUsage into addAssistantMessage(blocks, ?usage) on the real type (separate method deleted), so the alias has the intended one-method shape; all call sites updated. Only Agent and Stream remain true facades -- they have genuinely-internal fields plus API-shaping renames (Stream.phase->state, Phase->State) an alias can't express.
2026-06-07Plug the deep-embedder holes; remove public.zig escape hatcht
Close the gap that forced the CLI to import internal libpanto namespaces, then delete the transitional re-exports. The CLI now uses only the curated public surface. Additions to the public Agent facade: - init/deinit (heap-pin the inner; the handle is a copyable value). - addSystemMessage (.append) and setSystemPrompt (.replace). - compact(override_system_prompt, extra) falling back to the config prompt. - sessionId() accessor. CompactionConfig gains compaction_prompt, which owns the compaction system prompt for both auto-compaction and the explicit compact() default; the Agent.compaction_system_prompt field is deleted. ConversationData is the public name for the owned conversation value type (Session.load returns it, Agent.init adopts it), distinct from the borrowed Conversation handle. Agent.addSystemMessage/setSystemPrompt are kept on Agent (they persist with the SystemMode) rather than dropped as the plan first proposed.
2026-06-07Migrate panto CLI onto the public.zig surfacet
Move the CLI off the internal libpanto module namespaces onto the curated public API: data-type aliases (Config family, Message/MessageRole/ effectiveSystemBlocks, Event, Pricing/PricingRegistry, the session seam, FileSystemJSONLStore, ContentBlockType), process lifecycle (panto.init/ deinit), and ResultParts.fromText/fromTextOwned/deinit in place of the freestanding textResult/ownedTextResult/freeResultParts. The CLI remains on two flagged internal namespaces, panto.agent and panto.conversation: it is a deep embedder that drives the loop below the curated Agent/Conversation facades (system-prompt seeding through the agent, compaction_system_prompt, the open_stream_fn test seam, standalone Conversation values, compactAndPersist). These stay re-exported from public.zig as a documented deep-embedder escape hatch; trimming the transitional block removed every other internal re-export.
2026-06-07R2: redesign session store with wire-format identityt
Replace the single-session SessionManager seam with a directory-backed catalog. session_manager.zig -> file_system_jsonl_store.zig; the old machinery becomes internal SessionFile, and a new FileSystemJSONLStore implements the redesigned SessionStore vtable (create/list/resolve/latest/ load/appendMessages) minting Session/SessionInfo handles. Session logs now record wire-format provider identity ({api_style, base_url, model, reasoning}) instead of a single provider string or CLI aliases; no api_key material is ever stored. Disk* content types renamed Stored*; the rich audit-oriented write record is PersistentMessage (in-memory Message + WireIdentity + provenance). Agent.init now takes a Session; persist_provider/persist_model display strings deleted (banner stays alias-based, resume picks default model). Message.metadata round-trips. Dangling-prompt recovery dropped. CLI migrated to the catalog store for run/resume/list. Clean break, no version bump (old logs wiped).
2026-06-07R1: move tool registry off Config onto Agentt
The tool set is no longer part of the per-turn Config snapshot. Agent now owns a ToolRegistry (created empty at init), populated via the new Agent.registerTool / registerToolSource methods. openStream and OpenStreamFn take the registry as an explicit parameter rather than reading it from cfg.registry, so swapping provider/model between turns (setConfig) no longer disturbs the tool set. CLI migrated to register the Lua tool source onto the agent instead of a locally-owned registry. Test harnesses updated to stage tools on the agent.
2026-06-05refactor: Agent.run() -> Stream -> Stream.next() -> Eventt
converted the main agent loop from push-based (into callbacks on a Receiver vtable) to pull-based, where `next()` re-enters a state-machine Stream until the next event can be returned.
2026-06-05Move session persistence into the Agent; collapse CLI plumbingt
The Agent now owns its Conversation and a SessionStore, and persists everything it generates as turns progress. Embedders get persistence for free; the CLI no longer drives the session log. libpanto: - Agent.init takes a SessionStore + optional Conversation to adopt (resume path). Agent owns/tears down the conversation; turn-driving methods drop the *Conversation param and operate on self.conversation. - New Agent methods: submitUserMessage (adds+persists the user prompt immediately), addSystemMessage(text, mode), runStep persists the turn on every exit path (incl. partial turns on error), compactAndPersist for the explicit /compact path. Auto-compaction persists its window via runStep's tail. - turn_persist.zig: DiskMessage mapping moved out of the CLI; reads usage off Message.usage (no per-message-usage list). System mode rides on DiskMessage.mode, derived from the System block. - NullStore is now an allocator-bearing struct (frees consumed messages per the store-consumes-messages contract). - Tests: in-memory CapturingStore round-trip + NullStore turn test. panto CLI: - Delete src/session_persist.zig. REPL is submitUserMessage + runStep. - Reorder construction: store -> registry -> agent -> bootstrap -> seed/ reconcile system prompt through the agent -> load extensions. - command.Context drops conv/session_mgr; commands reach ctx.agent. - system_prompt seed/reconcile call agent.addSystemMessage. - CLIReceiver is display-only (per_message_usage removed). Phases 3-5 of docs/pluggable-session-store.md. Behavior preserved; full build + test suite green.
2026-06-04failure retries schemet
2026-06-03image uploadst
2026-06-02lua /commandst
2026-06-02compactiont
2026-06-02tool call resiliencyt
2026-06-02system prompt building and loggingt
2026-06-01rework lua tool schedulert
2026-06-01Rename system extension layer to base for clarityt
Replace all references to the "system" layer with "base" to better reflect its role as the foundational extension/tool layer in panto's hierarchy. The layer hierarchy now consistently uses: project > user > base. Includes: - Update agent README and build.zig documentation - Refactor tool registry and config module to support layered lookups - Add TestHarness abstraction for cleaner test setup - Improve JSON serialization with wire-encoded tool names - Add glob pattern matching for tool/extension discovery
2026-05-27real coding agent toolsT
2026-05-27system agent definition scaffoldingT
2026-05-27session filesT