51df618c93
Introduce Checkpoint, CheckpointStore, SuspendedError, AgentRegistry, and CompletedCall types. Add cooperative stop signal via context. Export CompletedCall (was unexported completedCall) so checkpoints can reference completed tool results. Add JSON tags to ToolResult and ApprovalResult for checkpoint serialization. Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>
104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package agent
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import (
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"fmt"
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"go.probo.inc/probo/pkg/llm"
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)
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type (
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MaxTurnsExceededError struct {
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MaxTurns int
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}
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MaxToolDepthExceededError struct {
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MaxDepth int
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}
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InputGuardrailTrippedError struct {
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Guardrail string
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Message string
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}
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OutputGuardrailTrippedError struct {
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Guardrail string
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Message string
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}
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InterruptedError struct {
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ToolCalls []llm.ToolCall
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PendingApprovals []llm.ToolCall
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Agent *Agent
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Messages []llm.Message
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Usage llm.Usage
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Turns int
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outerState *outerLoopState
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}
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needsApprovalError struct {
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allToolCalls []llm.ToolCall
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pendingApprovals []llm.ToolCall
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}
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nestedInterruptionError struct {
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inner *InterruptedError
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toolCallID string
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allToolCalls []llm.ToolCall
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completedCalls []CompletedCall
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}
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outerLoopState struct {
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agent *Agent
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messages []llm.Message
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usage llm.Usage
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turns int
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allToolCalls []llm.ToolCall
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toolCallID string
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completedCalls []CompletedCall
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innerInterrupt *InterruptedError
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}
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)
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func (e *MaxTurnsExceededError) Error() string {
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return fmt.Sprintf("agent exceeded maximum number of turns (%d)", e.MaxTurns)
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}
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func (e *MaxToolDepthExceededError) Error() string {
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return fmt.Sprintf("agent-tool delegation exceeded maximum depth (%d)", e.MaxDepth)
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}
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func (e *InputGuardrailTrippedError) Error() string {
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return fmt.Sprintf("input guardrail %q tripped: %s", e.Guardrail, e.Message)
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}
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func (e *OutputGuardrailTrippedError) Error() string {
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return fmt.Sprintf("output guardrail %q tripped: %s", e.Guardrail, e.Message)
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}
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func (e *InterruptedError) Error() string {
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return fmt.Sprintf("run interrupted: %d tool call(s) require approval", len(e.PendingApprovals))
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}
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func (e *needsApprovalError) Error() string {
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return fmt.Sprintf("%d tool call(s) require approval", len(e.pendingApprovals))
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}
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func (e *nestedInterruptionError) Error() string {
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return fmt.Sprintf("nested agent interrupted: %s", e.inner.Error())
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}
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