stemedb/sdk/go/adk

StemeDB ADK-Go Integration

ADK-Go tool wrappers for integrating AI agents with Episteme (StemeDB) using Google's Agent Development Kit.

Overview

This package provides:

• Tool Definitions: Query, Assert, ConstraintCheck, Trace, Supersede
• Callback Helpers: Confidence escalation, constraint enforcement, audit logging
• Agent Configuration: Pre-configured setups for standard agent types

Installation

go get github.com/orchard9/stemedb-go/adk

Quick Start

package main

import (
    "context"
    "log"

    "github.com/orchard9/stemedb-go/adk"
    "github.com/orchard9/stemedb-go/steme"
)

func main() {
    // Create StemeDB client
    signer, _ := steme.GenerateSigner()
    client := steme.NewClient("http://localhost:3000", signer)

    // Get all Episteme tools
    tools := adk.AllTools(client)

    // Or get pre-configured agent setups
    configs := adk.AllConfigs(
        client,
        0.8, // confidence threshold
        setState,
        log.Printf,
    )

    // Use with your ADK agent
    // agent := configureAgent(configs["implementation"])
}

func setState(key string, value interface{}) {
    // Store session state
}

Tools

Query Tool

Query Episteme with lens-based conflict resolution.

tool := adk.NewQueryTool(client)

input := adk.QueryInput{
    Subject:       "auth/jwt",
    Predicate:     "signing_algorithm",
    Lens:          "authority",
    Lifecycle:     "approved",
    MinConfidence: 0.8,
}

// Execute returns QueryOutput with resolved value

Critical Rules:

• Always filter by lifecycle=approved for production decisions
• Check confidence thresholds before acting
• Use appropriate lens (authority, consensus, recency)

Assert Tool

Store knowledge with lifecycle and confidence.

tool := adk.NewAssertTool(client)

input := adk.AssertInput{
    Subject:    "Tesla_Inc",
    Predicate:  "has_revenue",
    Object:     96.7,
    SourceHash: "0000...0000", // BLAKE3 hash of evidence
    Confidence: 0.95,
    Lifecycle:  "proposed", // Default to proposed
}

// Execute returns AssertOutput with content-addressed hash

Critical Rules:

• Always include source_hash for provenance
• Use confidence to express uncertainty (0.0-1.0)
• Default to lifecycle=proposed (not approved)
• Store conflicting sources without resolving

Constraint Check Tool

Pre-flight validation for Implementation Agent.

tool := adk.NewConstraintCheckTool(client)

input := adk.ConstraintCheckInput{
    Context: "auth_jwt",
}

// Execute returns ConstraintCheckOutput with must-use and forbidden patterns

Critical Rules:

• Implementation Agent MUST call before code generation
• Returns both positive (must_use) and negative (forbidden) constraints
• Enables contrastive learning ("use X, not Y, because Z")

Trace Tool

Audit trail queries for incident investigation.

tool := adk.NewTraceTool()

input := adk.TraceInput{
    AgentID: "deployment-agent",
    From:    "-6h",
    Subject: "auth/*",
}

// Execute returns TraceOutput with query history

Use Cases:

• On-Call SRE: "What did the agent query during the incident?"
• Human Supervisor: "What values did the agent see at that time?"
• Incident investigation: Sub-second trace queries

Supersede Tool

Error correction with cascade tracking.

tool := adk.NewSupersedeTool()

input := adk.SupersedeInput{
    Hash:   "bad_assertion_hash",
    Reason: "Proposal treated as approved",
    Type:   "Invalidate",
}

// Execute returns SupersedeOutput with affected assertions

Use Cases:

• Correct bad assertions
• Track downstream impact
• Incident remediation

Callbacks

Constraint Enforcement

Enforce constraints before code generation.

callback := adk.ConstraintEnforcementCallback(client, []string{
    "write_code",
    "generate_config",
})

// Use in agent config
agent.BeforeToolCallback = callback

Blocks code generation if forbidden patterns would be used.

Confidence Escalation

Escalate to human when confidence is too low.

callback := adk.ConfidenceEscalationCallback(0.8, setState)

// Use in agent config
agent.AfterToolCallback = callback

Sets session state for human review when confidence < threshold.

Audit Logging

Log all tool calls for debugging.

callback := adk.AuditLoggingCallback(log.Printf)

// Use in agent config
agent.AfterToolCallback = callback

Chaining Callbacks

Combine multiple callbacks.

beforeCallback := adk.ChainBeforeCallbacks(
    adk.ConstraintEnforcementCallback(client, codeGenTools),
    customValidation,
)

afterCallback := adk.ChainAfterCallbacks(
    adk.ConfidenceEscalationCallback(0.8, setState),
    adk.AuditLoggingCallback(log.Printf),
)

Agent Configurations

Implementation Agent

Writes code against approved patterns only.

config := adk.ConfigForImplementationAgent(client, log.Printf)

Features:

• Queries only approved patterns
• Checks constraints before code generation
• Blocks forbidden patterns
• Audit logging

Workflow:

1. Query approved pattern
2. Check constraints
3. Write code
4. Never use proposed/deprecated patterns

Lead Orchestrator

Coordinates agent team based on knowledge state.

config := adk.ConfigForLeadOrchestrator(
    client,
    0.8, // confidence threshold
    setState,
    log.Printf,
)

Features:

• Queries with appropriate lens
• Confidence threshold escalation
• Routes work to implementation or human
• Audit logging

Workflow:

1. Query current state
2. Check confidence
3. If high: route to implementation
4. If low: escalate to human

Research Agent

Discovers and stores knowledge with source attribution.

config := adk.ConfigForResearchAgent(client, log.Printf)

Features:

• Stores all sources (even conflicting)
• Expresses uncertainty via confidence
• Marks as proposed (not approved)
• Source provenance tracking

Workflow:

1. Research from multiple sources
2. Create assertion for each source
3. Don't resolve conflicts (store all)
4. Let orchestrator resolve via lens

Human Supervisor

Investigates incidents and corrects knowledge.

config := adk.ConfigForHumanSupervisor(client, log.Printf)

Features:

• Time-travel queries (as_of parameter)
• Trace queries
• Supersede for corrections
• Approve proposed assertions

Workflow:

1. Time-travel to incident
2. Trace agent queries
3. Identify bad assertion
4. Supersede with correction
5. Verify fix

On-Call SRE

Fast incident investigation via trace queries.

config := adk.ConfigForOnCallSRE(client, log.Printf)

Features:

• Sub-second trace queries
• Fast read-only investigation
• Escalation to supervisor for corrections

Workflow (under 10 minutes):

1. Trace: What did agent query?
2. Diff: What changed?
3. Identify: Which assertion is bad?
4. Escalate: Flag for supervisor

Agent Coordination Pattern

// Create multi-agent pipeline
client := steme.NewClient("http://localhost:3000", signer)

configs := adk.AllConfigs(client, 0.8, setState, log.Printf)

// Research Agent: Discovers knowledge
researchAgent := configureAgent(configs["research"])

// Lead Orchestrator: Routes based on confidence
leadAgent := configureAgent(configs["lead"])

// Implementation Agent: Writes code
implAgent := configureAgent(configs["implementation"])

// Sequential pipeline
pipeline := sequentialAgent(researchAgent, leadAgent, implAgent)

Session State vs. Episteme

Use Case	Mechanism	Why
Agent handoff in pipeline	Session State + OutputKey	Ephemeral, same conversation
Permanent org knowledge	Episteme Assert	Persists across sessions
"What was decided here?"	Session State	Temporary
"What should agents know forever?"	Episteme + lifecycle:approved	Permanent
Agent decision audit	Episteme QueryAudit	Immutable, time-travel

Testing

cd sdk/go/adk
go test -v

Tests include:

• Tool execution with mock client
• Confidence threshold enforcement
• Constraint checking
• Config creation
• Lifecycle/lens parsing

Interface-Based Design

Since ADK-Go is not yet publicly released, this package uses interface-based design:

// Generic tool interface
type Tool interface {
    Name() string
    Description() string
    Execute(ctx context.Context, input []byte) ([]byte, error)
}

// Generic client interface
type EpistemeClient interface {
    Query(ctx context.Context, params steme.QueryParams) (*steme.QueryResult, error)
    Assert(ctx context.Context, assertion steme.Assertion) (string, error)
}

This allows:

• Easy testing with mock clients
• Adaptation to any ADK implementation
• Standalone usage without ADK

Examples

See .claude/guides/integrations/adk-go-episteme.md for complete examples:

• Multi-agent pipeline
• Confidence escalation
• Constraint enforcement
• Time-travel queries
• Incident investigation

For More Information

• Use case context: use-cases/agile-agent-team.md
• Integration guide: .claude/guides/integrations/adk-go-episteme.md
• Base SDK: sdk/go/steme/