Floret

Floret is a reusable Go engine for interactive AI agents. It owns the model loop and the complete admitted Agent lifecycle: canonical messages, threads, turns, runs, tools, approvals, todos, artifacts, context, SubAgents, recovery, provider state, prompt cache, and observable execution facts.

The host application owns product UI, credentials, provider profiles, resource authorization, routing, read state, uploads before admission, and transport diagnostics. It must not persist or rebuild a second queryable Agent lifecycle.

Floret is not a graph workflow framework, a multi-agent orchestrator, or a product persistence layer.

Install

go get github.com/floegence/floret/v6@v6.0.1

Production integrations must resolve the published module. Do not use a local replace, go.work, or sibling repository path. Earlier major versions remain available only from their published tags; v6 does not restore retired facades.

Quick Start

Every Agent uses one explicit provider.Gateway. Floret allocates durable thread, turn, and run identities; an application supplies only a stable identity.LogicalRequestID for each logical mutation. This production example uses the official OpenAI-compatible Gateway and SQLite:

package main

import (
    "context"
    "os"

    "github.com/floegence/floret/v6/config"
    "github.com/floegence/floret/v6/provider"
    "github.com/floegence/floret/v6/runtime"
    "github.com/floegence/floret/v6/storage"
)

func main() {
    ctx := context.Background()
    gateway, err := provider.NewOpenAICompatible(provider.OpenAICompatibleOptions{
        Provider: "openai", Model: "gpt-4.1-mini",
        BaseURL: "https://api.openai.com/v1", APIKey: os.Getenv("OPENAI_API_KEY"),
        StateCompatibilityKey: "openai:gpt-4.1-mini:chat-completions:v1",
        Capabilities: provider.Capabilities{
            Reasoning: provider.ReasoningUnsupported,
            AttachmentPayload: provider.AttachmentDescriptors,
        },
    })
    if err != nil { panic(err) }
    agent, err := runtime.NewAgent(config.AgentConfig{
        Profile:      config.AgentProfile{ID: "assistant", Name: "Assistant"},
        SystemPrompt: "Answer clearly and concisely.",
        Context:      config.ContextPolicy{ContextWindowTokens: config.DefaultContextWindowTokens},
    }, gateway)
    if err != nil {
        panic(err)
    }

    host, err := runtime.Open(ctx, runtime.Options{Storage: storage.SQLite("floret.db")})
    if err != nil {
        panic(err)
    }
    defer func() {
        if err := host.Shutdown(context.Background()); err != nil {
            panic(err)
        }
    }()

    service, err := host.ThreadService(runtime.AgentFactoryFunc(func(context.Context, runtime.AgentRequest) (*runtime.Agent, error) {
        return agent, nil
    }))
    if err != nil {
        panic(err)
    }
    created, err := service.Create(ctx, runtime.CreateThreadInput{RequestKey: "create-conversation-42"})
    if err != nil {
        panic(err)
    }
    _, err = service.Send(ctx, runtime.SendInput{ThreadID: created.ThreadID, RequestKey: "send-message-42", Input: runtime.UserInput{Text: "Hello"}})
    if err != nil {
        panic(err)
    }
}

Hosts may also set runtime.SendInput.SupplementalContext for material that is needed only by the current provider turn. Floret validates and renders that context for the provider without adding a second canonical conversation message.

Run it with OPENAI_API_KEY=... go run ./cmd/examples/openai-sqlite. The complete example also reads the authoritative assistant projection. florettest remains test-only; use it for deterministic provider scripts and florettest.NewIDSource for deterministic lifecycle identities.

Public Packages

Package	Responsibility
identity	Thread, turn, run, prompt-scope, trace, logical-request, and artifact identities
config	Provider-neutral Agent profile, prompt, context, and reasoning policy
runtime	Immutable Agent construction, durable Host lifecycle, commands, queries, and subscriptions
observation	Sanitized runtime events and host-facing projections
tools	Local tool definitions, permissions, resources, effects, and results
tools/webfetch	Secure public-text HTTP/HTTPS fetch tool with fixed network and output limits
provider	Model Gateway contract and official provider constructors
storage	Opaque storage values and official memory and SQLite constructors
storage/spi	Advanced physical storage implementation contract
florettest	Scripted gateways and public conformance suites for tests only

Ordinary applications use identity, config, runtime, observation, tools, the official provider constructors, and opaque storage.Source values. Custom provider transports and physical storage implementations are advanced integration surfaces with separate conformance suites. Downstream code must never import internal/*.

Tool definitions may provide InvalidActivity when a host needs to preserve a safe display label from a parseable JSON object that fails the input schema. Floret uses that callback only for presentation: the invalid invocation still fails closed before permission, effect dispatch, and handler execution.

Question activity may include host-authored answer summaries for completed prompts. A secret answer is represented only by Redacted: true; Floret rejects a redacted answer that also carries values. These fields are display data, not an alternate input-response or durable message authority.

Structured activity may include bounded, ordered Rows containing host-sanitized text, Markdown, or code. Floret validates and preserves these display rows without interpreting product tools or accepting arbitrary JSON payloads.

Activity presentation is cumulative for one tool invocation. A result may add terminal status and output, while non-empty display facts from the matching tool call remain available in events, canonical views, and reopened threads.

SubAgent management activity uses a dedicated operation payload that preserves the exact action, ordered child targets, and bounded outcome counts. The existing single-SubAgent payload remains the durable child-thread fact; hosts do not need to infer management actions from labels or collapse multi-child results.

tools/webfetch.New supplies the product-neutral web_fetch implementation. It performs GET-only public HTTP/HTTPS reads, revalidates redirects, DNS, and dial targets, rejects non-text bodies, and returns Markdown or text under fixed limits. Its typed Activity carries the requested URL, response metadata, a 2,000-character preview; complete content remains in the tool result and artifact. It does not discover or request page icons. Hosts own static tool iconography, visibility, current product permission policy, and UI. Authentication, custom headers, non-GET requests, binary downloads, and browser rendering remain separate host capabilities.

Runtime Boundary

runtime.Host belongs in the composition root. Host.ThreadService returns the single typed lifecycle boundary. Its Create, Fork, Delete, SetTitle, List, View, History, Send, Respond, Cancel, Retry, queue, import, and Subscribe methods all operate on stable thread and request identities. Child agents are ordinary child threads with explicit parent identity, so they use the same current-view and command contracts.

Each thread has one in-memory runtime owner. Send first commits canonical turn acceptance, then publishes and returns the user item and active current view before provider dispatch. The canonical journal is the only durable fact source. Provider and tool I/O execute outside the thread lock. Cancel is idempotent for every known thread. It commits the terminal turn before returning, releases pending interactions, and fences late provider or tool output without waiting for those goroutines to exit. If an irreversible effect outcome cannot be confirmed, Floret atomically fails the turn with effect_outcome_unknown, closes every unfinished tool and interaction, clears provider continuation, and never replays the effect. Respond resolves the matching approval or input interaction in place.

runtime.NewAgent snapshots the resolved Agent profile, system prompt, Gateway, tools, capabilities, reasoning policy, and execution policy. The effective snapshot and continuation state used by each run are Floret-owned durable facts. Provider credentials and editable profile sources remain in the host.

Current views contain one Floret-ordered sequence of directly renderable user, thinking, assistant, tool, and interaction items, plus pending interactions and the accepted queue. Each item has a stable ID and ordinal; live deltas grow the same item in place, and tool approval, dispatch, and result state update the original tool item. Canonical reload derives the same sequence without a presentation ledger or draft mirror fields. Every item and interaction carries its exact TurnID and RunID, so multi-turn history and same-turn continuation never borrow identity from the current run. ThreadView.RunID identifies only the current execution; hosts must never use it to fill historical items. RunProgress is the actor-owned, process-local phase for an advancing run and is absent while awaiting interaction or after the run settles. ViewVersion is process-local notification ordering, not a durable replay cursor. Production hosts leave runtime.Options.IDSource nil; deterministic identity injection belongs to florettest.NewIDSource.

Consistent Reads

ThreadService.View returns one complete replaceable current view. The value returned by Host.ThreadService also implements ThreadContextReader; Context returns Floret's canonical context policy, usage, and one latest lifecycle record per compaction operation, including terminal state restored after runtime restart. The snapshot also exposes conversation-wide disjoint input, output, cache-read, and cache-write totals folded from canonical final provider usage records. Each successfully committed final provider_usage runtime event also carries ThreadUsageTotals. It is the live form of the same canonical fold; projected requests, stream-only usage, rejected attempts, and failed writes omit it. ThreadService.Subscribe publishes workspace summary and current-view updates; reconnecting clients refresh summaries and the currently visible view. There is no durable cursor, replay ledger, materialized projection, or second lifecycle authority.

Storage

For ordinary hosts, storage.Source is an opaque value consumed exclusively by runtime.Open:

runtime.Open(ctx, runtime.Options{Storage: storage.Memory()})
runtime.Open(ctx, runtime.Options{Storage: storage.SQLite("agent.db")})

Applications cannot use a Source as a lifecycle query path. Teams implementing a physical backend use the advanced storage/spi contracts and their conformance suite. SPI records remain opaque Floret data; a backend must not decode them into a second Agent model. Memory, SQLite, and third-party backends all run the same Floret-owned domain kernel.

New SQLite stores use incremental auto-vacuum so deleted pages can be reclaimed without rebuilding the database. A host that owns an older SQLite file may call storage.MaintainSQLite before runtime.Open. The maintenance boundary checks the exact Floret physical schema and database integrity, refuses an open runtime, and uses SQLite's native VACUUM or incremental_vacuum; it never copies records or exposes their contents.

Source Of Truth

Floret exclusively owns admitted messages and references, thread/turn/run lifecycle, titles, approvals, todos, tool invocation and outcome, pending-work settlement, artifacts, control signals, context and compaction, provider ledgers and state, prompt cache, SubAgent hierarchy, and Activity projections.

Hosts may persist product authorization and audit, routing, credentials, editable persona sources, resource catalogs, read state, unadmitted commands, upload staging, and transport diagnostics. Those records must not contain a serialized Floret DTO or support reconstruction of Agent state. Canonical message references are opaque durable facts; rich material needed only for the current provider turn belongs in SupplementalContext and never becomes conversation history or continuation state.

Shutdown

Host.Shutdown(ctx) stops admission, cancels Host-managed provider and tool execution, waits for it to finish, and then closes storage. If the context expires, Shutdown returns ctx.Err() and Host remains closing; a later call continues waiting. After completion, every retained handle returns ErrHostClosed.

Development

GOWORK=off go test ./...
GOWORK=off go vet ./...
GOWORK=off go test -race ./...
scripts/check_candidate_release_adoption.sh

Repository workflow and compatibility rules are defined in AGENTS.md. Architecture and maintenance knowledge lives in okf/.