600 lines
26 KiB
C#
600 lines
26 KiB
C#
using System.ClientModel;
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using System.ComponentModel;
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using System.Text.Json;
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using System.Text.Json.Serialization;
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using Microsoft.Agents.AI;
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using Microsoft.Extensions.AI;
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using OpenAI;
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// ============================================================================
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// Sales Agent (root agentic-chat backend) — extracted from the Framework column
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// ============================================================================
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//
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// In the Framework (`ms-agent-dotnet`) the `SalesAgentFactory` and ALL its
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// Sales/Flight model types live INLINE in Program.cs. The Harness keeps
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// Program.cs THIN, so the whole factory + its model types + the
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// source-generated serializer context are extracted here. The only behavioral
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// deltas from the Framework crib are the two systematic transformations the W0
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// contract (§1) mandates for every ported feature backend:
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//
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// 1. The inner ChatClientAgent is built via `chatClient.AsHarnessAgent(...)`
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// (harness wrapper) instead of `new ChatClientAgent(...)`.
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// 2. Credentials are NOT re-resolved here — the shared `OpenAIClient` is
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// injected from Program.cs (built once via ApiKeyResolver), dropping the
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// Framework's per-factory `configuration["GitHubToken"] ?? throw` block.
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//
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// The A2UI dynamic-schema tool (`generate_a2ui`) uses the harness 5-arg
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// `A2uiSecondaryToolCaller.GetDesignToolArgumentsAsync` (extra ILogger) and the
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// harness `BeautifulChatA2ui.{BuildA2uiResponseFromContent,StructuredError}`
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// helpers (W0 contract §1 credential/A2UI delta + §6 FLAG #3), NOT a
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// re-implemented framework copy.
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//
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// `CreateSalesAgent()` returns the inner harness agent wrapped in
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// `SharedStateAgent` (owned by the state family slot) so the shared-state
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// two-pass JSON-schema flow stays available for the sales-pipeline demos.
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// ============================================================================
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// =================
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// State Management
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// =================
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// Stage of a deal in the sales pipeline. Modeled as an enum so callers and
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// the LLM's structured output both get a closed set of legal values, rather
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// than a free-form string that can drift. Serialized as the
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// enum member name via JsonStringEnumConverter on the JsonSerializerOptions.
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public enum SalesStage
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{
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Prospect,
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Qualified,
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Proposal,
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Negotiation,
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ClosedWon,
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ClosedLost,
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}
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// Currency code for deal values. Small closed set covers the demo use cases.
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// Previously `Value` was an `int` with no currency indication at all; we now
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// carry currency + decimal amount together.
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public enum Currency
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{
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USD,
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EUR,
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GBP,
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JPY,
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}
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public record SalesTodo
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{
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/// <summary>
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/// The stable identifier for this todo.
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/// </summary>
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/// <remarks>
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/// The empty string is a load-bearing sentinel meaning "no id yet;
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/// server should assign one". <see cref="SalesState.ReplaceTodos"/>
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/// backfills any todo with <c>Id == ""</c> by generating a fresh Guid
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/// (see that method's documentation). Callers that want to express
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/// "pending, please assign" should use <see cref="NewPending"/> rather
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/// than constructing with an arbitrary placeholder string.
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///
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/// <see langword="required"/> is retained for compile-time presence so
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/// callers have to acknowledge the id contract, but runtime validation
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/// does NOT reject the empty-string sentinel — that would break the
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/// server-assigned-id path described above.
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/// </remarks>
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[JsonPropertyName("id")]
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public required string Id { get; init; }
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/// <summary>
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/// Factory for "pending" todos: creates a SalesTodo with a
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/// freshly-generated Guid-derived id so the empty-string sentinel never
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/// leaks into code that doesn't understand the backfill contract.
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/// </summary>
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public static SalesTodo NewPending(
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string title = "",
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SalesStage stage = SalesStage.Prospect,
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decimal value = 0m,
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Currency currency = Currency.USD,
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DateOnly? dueDate = null,
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string assignee = "") => new()
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{
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// 16 hex chars = 64 bits of entropy. 8 chars was ~32 bits and
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// has a non-trivial collision risk at tens of thousands of
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// todos; 16 pushes collision risk well past demo scale.
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Id = Guid.NewGuid().ToString("n")[..16],
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Title = title,
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Stage = stage,
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Value = value,
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Currency = currency,
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DueDate = dueDate,
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Assignee = assignee,
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};
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[JsonPropertyName("title")]
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public string Title { get; init; } = "";
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[JsonPropertyName("stage")]
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public SalesStage Stage { get; init; } = SalesStage.Prospect;
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// Deal value as a decimal (money) with explicit currency. Previously an
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// `int` with no sign or currency semantics. The init accessor validates
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// non-negative — negative deal values are not a legal business state in
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// this demo.
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[JsonPropertyName("value")]
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public decimal Value
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{
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get => _value;
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init
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{
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if (value < 0m)
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{
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throw new ArgumentOutOfRangeException(
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nameof(value),
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value,
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"SalesTodo.Value must be non-negative.");
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}
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_value = value;
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}
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}
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private readonly decimal _value;
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[JsonPropertyName("currency")]
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public Currency Currency { get; init; } = Currency.USD;
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// Nullable DateOnly — previously a free-form string that accepted any
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// input. System.Text.Json serializes DateOnly as ISO-8601 "YYYY-MM-DD".
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[JsonPropertyName("dueDate")]
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public DateOnly? DueDate { get; init; }
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[JsonPropertyName("assignee")]
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public string Assignee { get; init; } = "";
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/// <summary>
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/// Whether this deal is finished (won or lost). Derived from
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/// <see cref="Stage"/> so that the pair cannot disagree: a Prospect deal
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/// cannot be "completed", and a ClosedWon/ClosedLost deal cannot be
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/// "incomplete". Previously <c>Completed</c> was an independent bool and
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/// contradictions like <c>{Stage=ClosedWon, Completed=false}</c> were
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/// representable.
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/// </summary>
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[JsonPropertyName("completed")]
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public bool Completed => Stage is SalesStage.ClosedWon or SalesStage.ClosedLost;
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}
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// SalesState is the server-side in-memory store, SalesStateSnapshot is the
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// wire-format JSON Schema sent to the model. Previously both carried near-
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// identical List<SalesTodo>. We consolidate: SalesState holds a
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// read-only list behind an encapsulated replacement API, and
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// SalesStateSnapshot is a minimal record that wraps the same list for
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// serialization.
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public sealed class SalesState
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{
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private IReadOnlyList<SalesTodo> _todos = Array.Empty<SalesTodo>();
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/// <summary>
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/// Current published todo list. Reads are lock-free: reference reads of
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/// a field are atomic on .NET, and the single writer
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/// (<see cref="ReplaceTodos"/>) publishes a new fully-materialized list
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/// by a single reference assignment. We use <see cref="Volatile.Read{T}"/>
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/// to prevent the JIT from hoisting the read past a synchronization
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/// boundary on the reader side.
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/// </summary>
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public IReadOnlyList<SalesTodo> Todos => Volatile.Read(ref _todos);
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/// <summary>
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/// Atomically replaces the todo list, backfilling any todo whose
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/// <see cref="SalesTodo.Id"/> is empty (or null) with a freshly-generated
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/// Guid-derived id. This is the explicit contract for callers that want
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/// server-assigned ids: pass a SalesTodo with <c>Id = ""</c> and this
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/// method generates a stable id for it. Non-empty ids are preserved as-is.
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/// </summary>
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/// <remarks>
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/// Generated ids are 16 hex chars (64 bits of entropy), derived from a
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/// fresh <see cref="Guid"/>. The write is a single reference assignment
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/// via <see cref="Volatile.Write{T}"/>, which is atomic and visible to
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/// readers without a lock.
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/// </remarks>
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public void ReplaceTodos(IEnumerable<SalesTodo> todos)
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{
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ArgumentNullException.ThrowIfNull(todos);
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var materialized = todos.Select(t => t with
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{
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// 16 hex chars = 64 bits. Previously 8 (32 bits) had a non-
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// trivial collision probability at tens of thousands of todos.
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Id = string.IsNullOrEmpty(t.Id) ? Guid.NewGuid().ToString("n")[..16] : t.Id,
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}).ToArray();
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Volatile.Write(ref _todos, materialized);
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}
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}
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// =================
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// Flight Data
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// =================
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// Flight operational status. StatusColor was previously a separate string
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// field that could disagree with Status; we now derive color
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// from this enum deterministically in FlightInfo.StatusColor.
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public enum FlightStatus
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{
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OnTime,
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Delayed,
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Cancelled,
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Boarding,
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}
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public record FlightInfo
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{
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[JsonPropertyName("airline")]
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public string Airline { get; init; } = "";
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[JsonPropertyName("airlineLogo")]
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public string AirlineLogo { get; init; } = "";
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[JsonPropertyName("flightNumber")]
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public string FlightNumber { get; init; } = "";
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[JsonPropertyName("origin")]
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public string Origin { get; init; } = "";
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[JsonPropertyName("destination")]
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public string Destination { get; init; } = "";
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[JsonPropertyName("date")]
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public string Date { get; init; } = "";
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[JsonPropertyName("departureTime")]
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public string DepartureTime { get; init; } = "";
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[JsonPropertyName("arrivalTime")]
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public string ArrivalTime { get; init; } = "";
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[JsonPropertyName("duration")]
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public string Duration { get; init; } = "";
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// Status as enum. Previously `Status` and `StatusColor` were
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// independent free-form strings that could disagree (e.g. "On Time" with
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// color "red"). Now StatusColor is derived from Status and the pair is
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// guaranteed consistent.
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[JsonPropertyName("status")]
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public FlightStatus Status { get; init; } = FlightStatus.OnTime;
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[JsonPropertyName("statusColor")]
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public string StatusColor => Status switch
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{
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FlightStatus.OnTime => "green",
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FlightStatus.Delayed => "yellow",
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FlightStatus.Cancelled => "red",
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FlightStatus.Boarding => "blue",
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_ => "gray",
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};
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// Price as decimal (money) + separate Currency enum. The
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// old shape carried both a display string like "$342" AND a currency
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// code "USD" — redundant and easy to get out of sync.
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[JsonPropertyName("price")]
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public decimal Price { get; init; }
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[JsonPropertyName("currency")]
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public Currency Currency { get; init; } = Currency.USD;
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}
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// =================
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// Agent Factory
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// =================
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public class SalesAgentFactory
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{
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private const int HarnessMaxContextWindowTokens = 128_000;
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private const int HarnessMaxOutputTokens = 8_192;
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private const string SalesAgentInstructions = @"A helpful assistant that helps manage a sales pipeline.
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You have tools available to get, update, and query sales data.
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You can search for flights and generate dynamic UI.
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When discussing deals or the pipeline, ALWAYS use the get_sales_todos tool to see the current state before mentioning, updating, or discussing deals with the user.";
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private readonly IConfiguration _configuration;
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private readonly SalesState _state;
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private readonly OpenAIClient _openAiClient;
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private readonly ILogger _logger;
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private readonly ILoggerFactory _loggerFactory;
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private readonly JsonSerializerOptions _jsonSerializerOptions;
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// Ctor matches W0's Program.cs call-site exactly:
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// new SalesAgentFactory(builder.Configuration, openAiClient, jsonOptions, loggerFactory)
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// The shared OpenAIClient is injected (W0 contract §1 credential SSOT) —
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// no per-factory GitHubToken resolution here.
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public SalesAgentFactory(
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IConfiguration configuration,
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OpenAIClient openAiClient,
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JsonSerializerOptions jsonSerializerOptions,
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ILoggerFactory loggerFactory)
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{
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ArgumentNullException.ThrowIfNull(configuration);
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ArgumentNullException.ThrowIfNull(openAiClient);
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ArgumentNullException.ThrowIfNull(jsonSerializerOptions);
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ArgumentNullException.ThrowIfNull(loggerFactory);
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_configuration = configuration;
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_state = new();
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_openAiClient = openAiClient;
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_loggerFactory = loggerFactory;
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_logger = loggerFactory.CreateLogger<SalesAgentFactory>();
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_jsonSerializerOptions = jsonSerializerOptions;
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}
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public AIAgent CreateSalesAgent()
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{
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var chatClient = _openAiClient.GetChatClient("gpt-4o-mini").AsIChatClient();
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var harnessAgent = chatClient.AsHarnessAgent(
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HarnessMaxContextWindowTokens,
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HarnessMaxOutputTokens,
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new HarnessAgentOptions
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{
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Name = "SalesAgent",
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Description = "Sales pipeline assistant powered by Microsoft Agent Harness over Microsoft Agent Framework.",
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ChatOptions = new ChatOptions
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{
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Instructions = SalesAgentInstructions,
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MaxOutputTokens = HarnessMaxOutputTokens,
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Tools =
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[
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AIFunctionFactory.Create(GetSalesTodos, options: new() { Name = "get_sales_todos", SerializerOptions = _jsonSerializerOptions }),
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AIFunctionFactory.Create(ManageSalesTodos, options: new() { Name = "manage_sales_todos", SerializerOptions = _jsonSerializerOptions }),
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AIFunctionFactory.Create(QueryData, options: new() { Name = "query_data", SerializerOptions = _jsonSerializerOptions }),
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AIFunctionFactory.Create(GetWeather, options: new() { Name = "get_weather", SerializerOptions = _jsonSerializerOptions }),
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AIFunctionFactory.Create(SearchFlights, options: new() { Name = "search_flights", SerializerOptions = _jsonSerializerOptions }),
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AIFunctionFactory.Create(GenerateA2ui, options: new() { Name = "generate_a2ui", SerializerOptions = _jsonSerializerOptions }),
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],
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},
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});
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return new SharedStateAgent(harnessAgent, _jsonSerializerOptions, _loggerFactory.CreateLogger<SharedStateAgent>());
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}
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// Factory method for the Multimodal demo's vision-capable chat client.
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// Reuses the shared OpenAIClient so we don't re-resolve credentials for
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// each mount. Returns an IChatClient (NOT an agent) — the multimodal
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// endpoint consumes attachments natively and does not need the harness
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// agent wrapper. Referenced by W0's Program.cs MapPost("/multimodal", ...).
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public IChatClient CreateMultimodalChatClient() =>
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_openAiClient.GetChatClient("gpt-4o-mini").AsIChatClient();
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// Factory method for the Agent Config demo. Wraps a neutral harness agent
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// (no tools) in AgentConfigAgent so the tone/expertise/responseLength
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// directives read from AG-UI shared state steer the inner model per-turn.
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public AIAgent CreateAgentConfigAgent()
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{
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var chatClient = _openAiClient.GetChatClient("gpt-4o-mini").AsIChatClient();
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var inner = chatClient.AsHarnessAgent(
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HarnessMaxContextWindowTokens,
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HarnessMaxOutputTokens,
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new HarnessAgentOptions
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{
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Name = "AgentConfigInner",
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Description = "Agent Config demo powered by Microsoft Agent Harness over Microsoft Agent Framework.",
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ChatOptions = new ChatOptions
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{
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Instructions = "You are a helpful assistant. Follow the tone, expertise, and response-length directives in the system message for each turn.",
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MaxOutputTokens = HarnessMaxOutputTokens,
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},
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});
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return new AgentConfigAgent(inner, _loggerFactory.CreateLogger<AgentConfigAgent>());
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}
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// Factory method for the Reasoning demo. Delegates to the static
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// ReasoningAgentFactory.Create(...) which builds a reasoning-capable
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// harness agent and wraps it in the ReasoningAgent DelegatingAIAgent.
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public AIAgent CreateReasoningAgent()
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{
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var chatClient = _openAiClient.GetChatClient("gpt-4o-mini").AsIChatClient();
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return ReasoningAgentFactory.Create(chatClient, _loggerFactory);
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}
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// =================
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// Tools
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// =================
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[Description("Get the current sales pipeline")]
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private List<SalesTodo> GetSalesTodos()
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{
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var todos = _state.Todos;
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_logger.LogInformation("Getting sales todos: {Count} items", todos.Count);
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// Return a snapshot list copy — callers (AIFunctionFactory) serialize
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// this and we don't want concurrent ReplaceTodos mutating mid-serialize.
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return todos.ToList();
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}
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[Description("Update the sales pipeline")]
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private string ManageSalesTodos([Description("The updated list of sales todos")] List<SalesTodo> todos)
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{
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ArgumentNullException.ThrowIfNull(todos);
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_logger.LogInformation("Updating sales todos: {Count} items", todos.Count);
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_state.ReplaceTodos(todos);
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return "Pipeline updated";
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}
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[Description("Query financial data for charts")]
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private string QueryData([Description("The query to run")] string query)
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{
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_logger.LogInformation("Querying data: {Query}", query);
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var categories = new[] { "Engineering", "Marketing", "Sales", "Support", "Design" };
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var random = new Random();
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var results = categories.Select(c => new { category = c, value = random.Next(10000, 100000), quarter = "Q1 2026" });
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return JsonSerializer.Serialize(results);
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}
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[Description("Get the weather for a given location. Ensure location is fully spelled out.")]
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private WeatherInfo GetWeather([Description("The location to get the weather for")] string location)
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{
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_logger.LogInformation("Getting weather for: {Location}", location);
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return new()
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{
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City = location,
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Temperature = 20,
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Conditions = "sunny",
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Humidity = 50,
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WindSpeed = 10,
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FeelsLike = 25
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};
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}
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[Description("Search for available flights between two cities. Returns flight data with A2UI rendering.")]
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private object SearchFlights(
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[Description("Origin airport code or city")] string origin,
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[Description("Destination airport code or city")] string destination)
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{
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_logger.LogInformation("Searching flights from {Origin} to {Destination}", origin, destination);
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var flights = new List<FlightInfo>
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{
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new() { Airline = "United Airlines", AirlineLogo = "UA", FlightNumber = "UA 2451",
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Origin = origin, Destination = destination, Date = "2026-05-15",
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DepartureTime = "08:00", ArrivalTime = "16:35", Duration = "5h 35m",
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Status = FlightStatus.OnTime, Price = 342m, Currency = Currency.USD },
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new() { Airline = "Delta Air Lines", AirlineLogo = "DL", FlightNumber = "DL 1087",
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Origin = origin, Destination = destination, Date = "2026-05-15",
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DepartureTime = "10:30", ArrivalTime = "19:15", Duration = "5h 45m",
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Status = FlightStatus.OnTime, Price = 289m, Currency = Currency.USD },
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new() { Airline = "JetBlue Airways", AirlineLogo = "B6", FlightNumber = "B6 524",
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Origin = origin, Destination = destination, Date = "2026-05-15",
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DepartureTime = "14:15", ArrivalTime = "22:50", Duration = "5h 35m",
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Status = FlightStatus.OnTime, Price = 315m, Currency = Currency.USD },
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};
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var flightSchema = new object[]
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{
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new { id = "root", component = "Row",
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children = new { componentId = "flight-card", path = "/flights" }, gap = 16 },
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new { id = "flight-card", component = "FlightCard",
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airline = new { path = "airline" }, airlineLogo = new { path = "airlineLogo" },
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flightNumber = new { path = "flightNumber" }, origin = new { path = "origin" },
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destination = new { path = "destination" }, date = new { path = "date" },
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departureTime = new { path = "departureTime" }, arrivalTime = new { path = "arrivalTime" },
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|
duration = new { path = "duration" }, status = new { path = "status" },
|
|
price = new { path = "price" },
|
|
action = new { @event = new { name = "book_flight",
|
|
context = new { flightNumber = new { path = "flightNumber" },
|
|
origin = new { path = "origin" }, destination = new { path = "destination" },
|
|
price = new { path = "price" } } } } }
|
|
};
|
|
|
|
var operations = new object[]
|
|
{
|
|
new { version = "v0.9", createSurface = new { surfaceId = "flight-search-results",
|
|
catalogId = "copilotkit://app-dashboard-catalog" } },
|
|
new { version = "v0.9", updateComponents = new { surfaceId = "flight-search-results",
|
|
components = flightSchema } },
|
|
new { version = "v0.9", updateDataModel = new { surfaceId = "flight-search-results",
|
|
path = "/", value = new { flights } } }
|
|
};
|
|
|
|
return new { a2ui_operations = operations };
|
|
}
|
|
|
|
[Description("Generate dynamic A2UI components using a secondary LLM call")]
|
|
private async Task<object> GenerateA2ui(
|
|
[Description("Conversation context to generate UI from.")] string context = "",
|
|
CancellationToken cancellationToken = default)
|
|
{
|
|
context ??= "";
|
|
|
|
// Correlation id so server logs can be tied to the structured error
|
|
// we return to the caller / LLM. 16 hex chars = 64 bits of entropy.
|
|
var errorId = Guid.NewGuid().ToString("n")[..16];
|
|
var userContent = string.IsNullOrWhiteSpace(context)
|
|
? "Show me a sales dashboard with total revenue, new customers, and conversion rate metrics. Include a pie chart of revenue by category and a bar chart of monthly sales."
|
|
: context;
|
|
_logger.LogInformation("Generating A2UI (errorId={ErrorId}) for: {Request}", errorId, userContent);
|
|
|
|
string? content;
|
|
try
|
|
{
|
|
// Harness 5-arg signature (extra ILogger) — W0 contract §1 / §6 FLAG #3.
|
|
content = await A2uiSecondaryToolCaller.GetDesignToolArgumentsAsync(
|
|
_configuration,
|
|
"Generate a useful A2UI dashboard.",
|
|
userContent,
|
|
_logger,
|
|
cancellationToken).ConfigureAwait(false);
|
|
}
|
|
catch (HttpRequestException ex)
|
|
{
|
|
_logger.LogError(ex, "GenerateA2ui (errorId={ErrorId}): transport failure", errorId);
|
|
return BeautifulChatA2ui.StructuredError("upstream_unavailable", "The upstream AI service is currently unreachable. Please retry.", "Retry the request in a few seconds.", errorId);
|
|
}
|
|
catch (ClientResultException ex)
|
|
{
|
|
_logger.LogError(ex, "GenerateA2ui (errorId={ErrorId}): upstream returned error status {Status}", errorId, ex.Status);
|
|
return BeautifulChatA2ui.StructuredError("upstream_error", "The upstream AI service returned an error.", "Try rephrasing the request or retrying later.", errorId);
|
|
}
|
|
catch (OperationCanceledException)
|
|
{
|
|
_logger.LogInformation("GenerateA2ui (errorId={ErrorId}): cancelled", errorId);
|
|
throw;
|
|
}
|
|
catch (JsonException ex)
|
|
{
|
|
_logger.LogError(ex, "GenerateA2ui (errorId={ErrorId}): upstream returned malformed JSON", errorId);
|
|
return BeautifulChatA2ui.StructuredError("upstream_malformed", "The AI service returned an invalid response.", "Try rephrasing the request or retrying.", errorId);
|
|
}
|
|
catch (KeyNotFoundException ex)
|
|
{
|
|
_logger.LogError(ex, "GenerateA2ui (errorId={ErrorId}): upstream JSON missing required field", errorId);
|
|
return BeautifulChatA2ui.StructuredError("upstream_malformed", "The AI service returned an unexpected response shape.", "Try rephrasing the request or retrying.", errorId);
|
|
}
|
|
// Deliberately no catch (Exception ex): configuration errors like
|
|
// ApiKeyResolver's InvalidOperationException must propagate so a
|
|
// misconfigured deployment fails fast at the operator layer.
|
|
|
|
if (string.IsNullOrEmpty(content))
|
|
{
|
|
_logger.LogError("GenerateA2ui (errorId={ErrorId}): empty response", errorId);
|
|
return BeautifulChatA2ui.StructuredError(
|
|
"empty_llm_output",
|
|
"The AI service returned an empty response.",
|
|
"Try rephrasing the request or retrying.",
|
|
errorId);
|
|
}
|
|
|
|
// Reuse the harness A2UI response builder so the JSON massaging is
|
|
// shared across demos with the same structured error taxonomy.
|
|
return BeautifulChatA2ui.BuildA2uiResponseFromContent(content, errorId, _logger);
|
|
}
|
|
}
|
|
|
|
// =================
|
|
// Data Models
|
|
// =================
|
|
|
|
// SalesStateSnapshot is the wire-format shape: what the model emits via
|
|
// JSON Schema and what we serialize as DataContent on the outbound side
|
|
// (used by SharedStateAgent's two-pass structured-output flow). Immutable
|
|
// record wrapping the same list type SalesState exposes, with explicit
|
|
// JsonPropertyName so the schema name doesn't drift under default policies.
|
|
public sealed record SalesStateSnapshot(
|
|
[property: JsonPropertyName("todos")] IReadOnlyList<SalesTodo> Todos)
|
|
{
|
|
public SalesStateSnapshot() : this(Array.Empty<SalesTodo>()) { }
|
|
}
|
|
|
|
// =================
|
|
// Serializer Context
|
|
// =================
|
|
// Referenced by W0's Program.cs:
|
|
// options.SerializerOptions.TypeInfoResolverChain.Add(SalesAgentSerializerContext.Default);
|
|
// NOTE: WeatherInfo is declared in Program.cs (do NOT re-declare); it is
|
|
// registered here so the source-generated context can resolve the sales
|
|
// agent's get_weather tool I/O through the fast path.
|
|
[JsonSerializable(typeof(SalesStateSnapshot))]
|
|
[JsonSerializable(typeof(SalesTodo))]
|
|
[JsonSerializable(typeof(List<SalesTodo>))]
|
|
[JsonSerializable(typeof(IReadOnlyList<SalesTodo>))]
|
|
[JsonSerializable(typeof(SalesStage))]
|
|
[JsonSerializable(typeof(Currency))]
|
|
[JsonSerializable(typeof(WeatherInfo))]
|
|
[JsonSerializable(typeof(FlightInfo))]
|
|
[JsonSerializable(typeof(List<FlightInfo>))]
|
|
[JsonSerializable(typeof(FlightStatus))]
|
|
[JsonSerializable(typeof(DateOnly))]
|
|
internal sealed partial class SalesAgentSerializerContext : JsonSerializerContext;
|