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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.
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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.
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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.
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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.
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public.zig is now the sole exported root (build.zig points the panto module
at it). It defines the curated public API allowlist: behavioral facades
(Agent/Stream/Conversation wrapping a pointer to the heap-pinned internal),
the ResultParts struct, Pricing, the session seam, and data-type aliases
for the Config/Conversation/Event families.
A clearly-marked transitional block re-exports the internal module
namespaces and the freestanding result-part helpers the panto CLI still
imports directly; Phase 4 trims these as the CLI migrates onto the curated
surface. Stream.Phase is now pub so State can alias it. The refAllDecls
test contract moved from root.zig into public.zig.
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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).
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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.
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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.
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The kept-verbatim suffix is no longer copied with stale usage. After
compaction the conversation begins [summary(user), kept_user,
kept_assistant, ...]; we rewrite each kept assistant's usage so the window
reads as a fresh conversation anchored at the summary.
- runSingleCompactionTurn returns the summary text plus its size (the
provider-reported output token count for the summary turn, falling back
to the word-count heuristic when usage is absent).
- rewriteWithSummary takes summary_size and forward-walks the kept suffix
maintaining a synthetic cumulative input: non-assistant messages add
their messageTokenEstimate; each assistant gets input = running
cumulative total, with the full prompt (input+cache_read+cache_write
worth) collapsed into input and cache buckets zeroed (a rewrite busts the
provider prefix cache). output/reasoning are copied verbatim; assistants
without prior usage stay null.
This keeps the cumulative-delta sizing (computeSplit/turnTokenEstimate) and
any future TUI context-window readout correct without special-casing
compaction. Tests cover the single- and multi-turn restated chains
(including cache-bucket collapse).
Test stub ScriptedTurn gains an optional usage stamp.
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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.
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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
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OpenAI and Anthropic have tool details (id, name) converge on different
timelines. In all cases they are available in `onBlockComplete` which
comes with the full block, and previously we had an optional `BlockMeta`
argument to `onBlockStart` - the anthropic timeline.
We removed the `BlockMeta` from `onBlockStart` since it was always going
to be unreliable, and now have an explicit `onToolDetails` instead. This
allows us to provide the tool id and name as early as possible from the
openai provider (could be in the middle of content deltas), and provide
a reliable signal across providers.
Also, fix test output.
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Close each tool_use on next-index delta (and at finalize) so receivers
see one start/delta/complete trio per tool, matching Anthropic. Log+drop
fragments for already-closed indices.
Remove BlockMeta from the Receiver interface: tool id/name can't be
reliably known at onBlockStart under OpenAI's streaming model. Receivers
get identity from the assembled ContentBlock at onBlockComplete. CLI
renders 'tool: {args} : (name)' accordingly.
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- new multi-tool registration via ToolSource
- thread per source-or-standalone-tool
- switched to zig 0.16 Io threading interface
- cli: include `luv` package and run concurrent lua tools via libuv
- one single long-lived lua_State for the whole cli program
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