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fork of Kludex/zigai, ported to zig 0.17
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const std = @import("std");const yaml = @import("yaml");const json_limits = @import("json.zig");const capability_types = @import("capability.zig");const agent_types = @import("agent.zig");const model_types = @import("model.zig");
pub const Error = error{ InvalidAgentSpec, UnsupportedAgentSpecVersion,};
/// Explicit reference to a secret supplied by the resolution environment.pub const SecretReference = struct { /// Environment variable name. Literal secret values are not accepted. env: []const u8,};
/// Provider and model identity without provider-client lifetime ownership.pub const ProviderSpec = struct { /// Provider resolver key such as `openai`, `anthropic`, or `google`. name: []const u8, /// Exact model ID passed to the provider resolver. model: []const u8, /// Optional provider endpoint override. base_url: ?[]const u8 = null, /// Optional environment-backed credential reference. api_key: ?SecretReference = null,};
/// Reference to an application-registered capability implementation.pub const CapabilitySpec = struct { /// Stable capability registry ID. id: []const u8, /// Optional loading override for this agent specification. loading: ?capability_types.Loading = null, /// Optional retention override for this agent specification. unload_policy: ?capability_types.UnloadPolicy = null,};
/// Versioned, provider-neutral agent configuration document.pub const Spec = struct { /// Schema version. ZigAI currently accepts only version 1. version: u8, /// Optional application-facing agent name. name: ?[]const u8 = null, /// Provider and exact model selection. provider: ProviderSpec, /// Optional system prompt. system_prompt: ?[]const u8 = null, /// Static agent instructions in declaration order. instructions: []const []const u8 = &.{}, /// Capability references in declaration order. capabilities: []const CapabilitySpec = &.{},};
/// Arena-owned specification. All nested slices remain valid until `deinit`.pub const Owned = struct { arena: std.heap.ArenaAllocator, value: Spec,
pub fn deinit(self: *Owned) void { self.arena.deinit(); self.* = undefined; }};
/// Read-only environment view supplied explicitly by the application.pub const Environment = struct { context: *anyopaque, getFn: *const fn (context: *anyopaque, name: []const u8) ?[]const u8,
pub fn get(self: Environment, name: []const u8) ?[]const u8 { return self.getFn(self.context, name); }};
/// Fields in which `${NAME}` expansion is permitted. Expansion is off by/// default and `$${NAME}` always produces the literal `${NAME}`.pub const InterpolationFields = struct { model: bool = false, base_url: bool = false, system_prompt: bool = false, instructions: bool = false,};
/// Deny-by-default policy for reading process-like environment values.pub const EnvironmentPolicy = struct { fields: InterpolationFields = .{}, /// Names permitted in `${NAME}` placeholders in enabled fields. interpolation_names: []const []const u8 = &.{}, /// Names permitted in structured `api_key.env` references. secret_names: []const []const u8 = &.{},};
/// Fully expanded provider input passed to application-owned resolution code./// The API key is available only during resolution and is never retained by/// ZigAI diagnostics.pub const ProviderInput = struct { name: []const u8, model: []const u8, base_url: ?[]const u8, api_key: ?[]const u8,
fn validation(self: ProviderInput) ProviderValidationInput { return .{ .name = self.name, .model = self.model, .base_url = self.base_url, .has_api_key = self.api_key != null, }; }};
/// Secret-free provider input used by dry-run validation callbacks.pub const ProviderValidationInput = struct { name: []const u8, model: []const u8, base_url: ?[]const u8, has_api_key: bool,};
pub const ProviderResolutionError = error{ UnknownProvider, UnknownModel, InvalidProviderConfiguration,};
/// Model plus optional application cleanup. `buildFn` may allocate model/// context in the supplied arena; cleanup runs before that arena is released.pub const ModelHandle = struct { model: model_types.Model, cleanup_context: ?*anyopaque = null, cleanupFn: ?*const fn (context: *anyopaque) void = null,
pub fn deinit(self: *ModelHandle) void { if (self.cleanupFn) |cleanup| cleanup(self.cleanup_context orelse self.model.context); self.* = undefined; }};
/// Application boundary for provider/model lookup and client construction./// `validateFn` must be side-effect free and perform no network access.pub const ProviderResolver = struct { context: *anyopaque, validateFn: *const fn (context: *anyopaque, input: ProviderValidationInput) ProviderResolutionError!void, buildFn: *const fn ( context: *anyopaque, arena: std.mem.Allocator, input: ProviderInput, ) anyerror!ModelHandle,
pub fn validate(self: ProviderResolver, input: ProviderValidationInput) ProviderResolutionError!void { return self.validateFn(self.context, input); }
pub fn build(self: ProviderResolver, arena: std.mem.Allocator, input: ProviderInput) !ModelHandle { return self.buildFn(self.context, arena, input); }};
/// Application-owned capability catalog. Returned implementations and their/// callback contexts must outlive the resolved agent.pub const CapabilityResolver = struct { context: *anyopaque, getFn: *const fn (context: *anyopaque, id: []const u8) ?agent_types.Capability,
pub fn get(self: CapabilityResolver, id: []const u8) ?agent_types.Capability { return self.getFn(self.context, id); }};
pub const ResolutionOptions = struct { environment: ?Environment = null, environment_policy: EnvironmentPolicy = .{}, provider: ProviderResolver, capabilities: ?CapabilityResolver = null,};
pub const ResolutionError = error{ InvalidEnvironmentInterpolation, EnvironmentVariableNotAllowed, MissingEnvironmentVariable, EmptySecret, UnknownCapability, InvalidCapabilityImplementation, InvalidCapabilityComposition,};
/// Arena-owned runnable agent assembled from a data-only specification.pub const Resolved = struct { arena: std.heap.ArenaAllocator, model_handle: ModelHandle, agent: agent_types.Agent,
pub fn deinit(self: *Resolved) void { self.model_handle.deinit(); self.arena.deinit(); self.* = undefined; }};
/// Performs every local resolution check without constructing a provider/// client or making network requests.pub fn validateResolution(gpa: std.mem.Allocator, spec: Spec, options: ResolutionOptions) !void { var prepared = try prepareResolution(gpa, spec, options); defer prepared.arena.deinit(); try options.provider.validate(prepared.provider.validation());}
/// Resolves a specification into an owned `Agent` after a successful dry-run/// validation. Provider and capability implementations remain application/// choices rather than parser dependencies.pub fn resolve(gpa: std.mem.Allocator, spec: Spec, options: ResolutionOptions) !Resolved { var prepared = try prepareResolution(gpa, spec, options); errdefer prepared.arena.deinit(); try options.provider.validate(prepared.provider.validation()); var model_handle = try options.provider.build(prepared.arena.allocator(), prepared.provider); errdefer model_handle.deinit(); return .{ .arena = prepared.arena, // kcov-ignore .model_handle = model_handle, .agent = .{ .model = model_handle.model, .capabilities = prepared.capabilities, .system_prompt = prepared.system_prompt, .instructions = prepared.instructions, }, };}
const PreparedResolution = struct { arena: std.heap.ArenaAllocator, provider: ProviderInput, system_prompt: ?[]const u8, instructions: []const agent_types.Instruction, capabilities: []const agent_types.Capability,};
fn prepareResolution(gpa: std.mem.Allocator, spec: Spec, options: ResolutionOptions) !PreparedResolution { try validate(spec); var arena = std.heap.ArenaAllocator.init(gpa); errdefer arena.deinit(); const memory = arena.allocator(); const environment = options.environment; const policy = options.environment_policy;
const provider = ProviderInput{ .name = try memory.dupe(u8, spec.provider.name), .model = try interpolate(memory, spec.provider.model, policy.fields.model, environment, policy.interpolation_names), .base_url = if (spec.provider.base_url) |value| try interpolate(memory, value, policy.fields.base_url, environment, policy.interpolation_names) else null, .api_key = if (spec.provider.api_key) |reference| try resolveSecret(memory, reference, environment, policy.secret_names) else null, };
const system_prompt = if (spec.system_prompt) |value| try interpolate(memory, value, policy.fields.system_prompt, environment, policy.interpolation_names) else null; const instructions = try memory.alloc(agent_types.Instruction, spec.instructions.len); for (spec.instructions, instructions) |source, *instruction| { instruction.* = .{ .text = try interpolate( memory, source, policy.fields.instructions, environment, policy.interpolation_names, ) }; } const capabilities = try resolveCapabilities(memory, spec.capabilities, options.capabilities); return .{ .arena = arena, .provider = provider, .system_prompt = system_prompt, .instructions = instructions, .capabilities = capabilities, };}
fn resolveSecret( allocator: std.mem.Allocator, reference: SecretReference, environment: ?Environment, allowed_names: []const []const u8,) ![]const u8 { if (!containsName(allowed_names, reference.env)) return ResolutionError.EnvironmentVariableNotAllowed; const source = environment orelse return ResolutionError.MissingEnvironmentVariable; const value = source.get(reference.env) orelse return ResolutionError.MissingEnvironmentVariable; if (value.len == 0) return ResolutionError.EmptySecret; return allocator.dupe(u8, value);}
fn interpolate( allocator: std.mem.Allocator, source: []const u8, enabled: bool, environment: ?Environment, allowed_names: []const []const u8,) ![]const u8 { if (!enabled) return allocator.dupe(u8, source); var output: std.ArrayList(u8) = .empty; defer output.deinit(allocator); var index: usize = 0; while (index < source.len) { if (source[index] == '$' and index + 1 < source.len and source[index + 1] == '$') { try output.append(allocator, '$'); index += 2; continue; } if (source[index] != '$' or index + 1 >= source.len or source[index + 1] != '{') { try output.append(allocator, source[index]); index += 1; continue; } const closing = std.mem.indexOfScalarPos(u8, source, index + 2, '}') orelse return ResolutionError.InvalidEnvironmentInterpolation; const name = source[index + 2 .. closing]; if (!validEnvironmentName(name)) return ResolutionError.InvalidEnvironmentInterpolation; if (!containsName(allowed_names, name)) return ResolutionError.EnvironmentVariableNotAllowed; const values = environment orelse return ResolutionError.MissingEnvironmentVariable; const value = values.get(name) orelse return ResolutionError.MissingEnvironmentVariable; try output.appendSlice(allocator, value); index = closing + 1; } return output.toOwnedSlice(allocator);}
fn containsName(names: []const []const u8, expected: []const u8) bool { for (names) |name| if (std.mem.eql(u8, name, expected)) return true; return false;}
fn resolveCapabilities( allocator: std.mem.Allocator, configured: []const CapabilitySpec, maybe_resolver: ?CapabilityResolver,) ![]const agent_types.Capability { if (configured.len == 0) return &.{}; const resolver = maybe_resolver orelse return ResolutionError.UnknownCapability; var resolved: std.ArrayList(agent_types.Capability) = .empty; defer resolved.deinit(allocator); for (configured) |item| { try appendCapability(allocator, &resolved, resolver, item.id, item); } var index: usize = 0; while (index < resolved.items.len) : (index += 1) { for (resolved.items[index].dependencies) |dependency| { if (findCapability(resolved.items, dependency) == null) { try appendCapability(allocator, &resolved, resolver, dependency, null); } } } const capabilities = try resolved.toOwnedSlice(allocator); const entries = try allocator.alloc(capability_types.Entry, capabilities.len); for (capabilities, entries, 0..) |capability, *entry, source_index| entry.* = .{ .descriptor = capability.descriptor(), .scope = .agent, .source_index = source_index, }; if (try (capability_types.Registry{ .entries = entries }).diagnose(allocator) != null) { return ResolutionError.InvalidCapabilityComposition; } return capabilities;}
fn appendCapability( allocator: std.mem.Allocator, resolved: *std.ArrayList(agent_types.Capability), resolver: CapabilityResolver, id: []const u8, override: ?CapabilitySpec,) !void { var capability = resolver.get(id) orelse return ResolutionError.UnknownCapability; const implementation_id = capability.id orelse return ResolutionError.InvalidCapabilityImplementation; if (!std.mem.eql(u8, implementation_id, id)) return ResolutionError.InvalidCapabilityImplementation; if (override) |item| { if (item.loading) |loading| capability.loading = loading; if (item.unload_policy) |unload_policy| capability.unload_policy = unload_policy; } try resolved.append(allocator, capability);}
fn findCapability(capabilities: []const agent_types.Capability, id: []const u8) ?usize { for (capabilities, 0..) |capability, index| { if (std.mem.eql(u8, capability.id.?, id)) return index; } return null;}
/// Parses strict JSON. Unknown fields and literal API keys are rejected.pub fn parseJson(gpa: std.mem.Allocator, source: []const u8) !Owned { try json_limits.validate(gpa, source, json_limits.defaults.cli_config); var arena = std.heap.ArenaAllocator.init(gpa); errdefer arena.deinit(); const memory = arena.allocator(); const owned_source = try memory.dupe(u8, source); const value = std.json.parseFromSliceLeaky(Spec, memory, owned_source, .{ .allocate = .alloc_always, .ignore_unknown_fields = false, }) catch |failure| return switch (failure) { error.OutOfMemory => error.OutOfMemory, else => Error.InvalidAgentSpec, }; try validate(value); return .{ .arena = arena, .value = value };}
/// Parses strict YAML using the core schema and the JSON-equivalent shape.pub fn parseYaml(gpa: std.mem.Allocator, source: []const u8) !Owned { if (source.len > json_limits.defaults.cli_config.max_document_bytes) { return error.DocumentTooLarge; } var document = yaml.loadWithOptions(gpa, source, .{ .schema = .core, .duplicate_key_behavior = .reject, .unknown_tag_behavior = .reject, .max_input_bytes = json_limits.defaults.cli_config.max_document_bytes, .max_nesting_depth = json_limits.defaults.cli_config.max_depth, }) catch |failure| return switch (failure) { error.OutOfMemory => error.OutOfMemory, else => Error.InvalidAgentSpec, }; defer document.deinit();
var output: std.Io.Writer.Allocating = .init(gpa); defer output.deinit(); var json: std.json.Stringify = .{ .writer = &output.writer }; writeJsonNode(&json, document.root) catch |failure| return switch (failure) { error.WriteFailed => error.OutOfMemory, error.InvalidAgentSpec => Error.InvalidAgentSpec, }; return parseJson(gpa, output.written());}
fn validate(spec: Spec) !void { if (spec.version != 1) return Error.UnsupportedAgentSpecVersion; if (spec.name) |name| if (name.len == 0) return Error.InvalidAgentSpec; if (!validId(spec.provider.name) or spec.provider.model.len == 0) return Error.InvalidAgentSpec; if (spec.provider.base_url) |base_url| if (base_url.len == 0) return Error.InvalidAgentSpec; if (spec.provider.api_key) |secret| if (!validEnvironmentName(secret.env)) { return Error.InvalidAgentSpec; }; if (spec.instructions.len > 64 or spec.capabilities.len > 256) return Error.InvalidAgentSpec; for (spec.instructions) |instruction| if (instruction.len == 0) return Error.InvalidAgentSpec; for (spec.capabilities, 0..) |item, index| { if (!validId(item.id)) return Error.InvalidAgentSpec; for (spec.capabilities[0..index]) |previous| { if (std.mem.eql(u8, previous.id, item.id)) return Error.InvalidAgentSpec; } }}
fn validId(id: []const u8) bool { if (id.len == 0) return false; for (id, 0..) |byte, index| { const valid = std.ascii.isAlphanumeric(byte) or byte == '-' or byte == '_' or byte == '.'; if (!valid or (index == 0 and !std.ascii.isAlphanumeric(byte))) return false; } return true;}
fn validEnvironmentName(name: []const u8) bool { if (name.len == 0 or !(std.ascii.isAlphabetic(name[0]) or name[0] == '_')) return false; for (name[1..]) |byte| if (!(std.ascii.isAlphanumeric(byte) or byte == '_')) return false; return true;}
const WriteJsonNodeError = error{ WriteFailed, InvalidAgentSpec };
fn writeJsonNode(json: *std.json.Stringify, node: *const yaml.Node) WriteJsonNodeError!void { switch (node.*) { .null_value => try json.write(null), .bool_value => |value| try json.write(value.value), .int_value => |value| try json.write(value.value), .float_value => |value| try json.write(value.value), .scalar => |value| try json.write(value.value), .sequence => |sequence| { try json.beginArray(); for (sequence.items) |item| try writeJsonNode(json, item); try json.endArray(); }, .mapping => |mapping| { try json.beginObject(); for (mapping.pairs) |pair| { const key = switch (pair.key.*) { .scalar => |value| value.value, else => return error.InvalidAgentSpec, }; try json.objectField(key); try writeJsonNode(json, pair.value); } try json.endObject(); }, // The public loader resolves aliases to their anchored nodes. Only // manually constructed `yaml.Node` values can retain this tag. .alias => unreachable, }}
test "JSON and YAML parse to the same strict agent specification" { const json = \\{"version":1,"name":"support","provider":{"name":"openai","model":"gpt-5-mini","api_key":{"env":"OPENAI_API_KEY"}},"system_prompt":"Help.","instructions":["Be concise."],"capabilities":[{"id":"search","loading":"on_demand","unload_policy":"history"}]} ; const yaml_source = \\version: 1 \\name: support \\provider: \\ name: openai \\ model: gpt-5-mini \\ api_key: \\ env: OPENAI_API_KEY \\system_prompt: Help. \\instructions: \\- Be concise. \\capabilities: \\- id: search \\ loading: on_demand \\ unload_policy: history ; var from_json = try parseJson(std.testing.allocator, json); defer from_json.deinit(); var from_yaml = try parseYaml(std.testing.allocator, yaml_source); defer from_yaml.deinit(); try std.testing.expectEqualStrings(from_json.value.provider.model, from_yaml.value.provider.model); try std.testing.expectEqualStrings("OPENAI_API_KEY", from_yaml.value.provider.api_key.?.env); try std.testing.expectEqual(capability_types.Loading.on_demand, from_yaml.value.capabilities[0].loading.?);}
test "agent specifications reject unknown fields literals duplicates and invalid semantics" { const invalid_json = [_][]const u8{ "{\"version\":1,\"provider\":{\"name\":\"openai\",\"model\":\"m\"},\"unknown\":true}", "{\"version\":2,\"provider\":{\"name\":\"openai\",\"model\":\"m\"}}", "{\"version\":1,\"provider\":{\"name\":\"openai\",\"model\":\"m\",\"api_key\":\"literal\"}}", "{\"version\":1,\"provider\":{\"name\":\"openai\",\"model\":\"m\"},\"capabilities\":[{\"id\":\"same\"},{\"id\":\"same\"}]}", "{\"version\":1,\"provider\":{\"name\":\"bad name\",\"model\":\"m\"}}", "{\"version\":1,\"provider\":{\"name\":\"openai\",\"model\":\"m\",\"api_key\":{\"env\":\"BAD-NAME\"}}}", }; for (invalid_json) |source| { const result = parseJson(std.testing.allocator, source); if (std.mem.indexOf(u8, source, "\"version\":2") != null) { try std.testing.expectError(Error.UnsupportedAgentSpecVersion, result); } else { try std.testing.expectError(Error.InvalidAgentSpec, result); } } try std.testing.expectError(Error.InvalidAgentSpec, parseYaml(std.testing.allocator, \\version: 1 \\version: 1 \\provider: {name: openai, model: m} )); try std.testing.expectError(Error.InvalidAgentSpec, parseYaml(std.testing.allocator, \\version: 1 \\provider: {name: openai, model: m} \\unknown: [null, true, 1.5] )); try std.testing.expectError(Error.InvalidAgentSpec, parseYaml(std.testing.allocator, \\version: 1 \\provider: &provider {name: openai, model: m} \\copy: *provider )); try std.testing.expectError(Error.InvalidAgentSpec, parseYaml(std.testing.allocator, \\? [complex] \\: value ));}
test "agent specification semantic validation covers every bounded field" { const valid_provider = ProviderSpec{ .name = "openai", .model = "model" }; try validate(.{ .version = 1, .provider = .{ .name = "gateway_1.test", .model = "model" } }); try std.testing.expectError(Error.InvalidAgentSpec, validate(.{ .version = 1, .name = "", .provider = valid_provider, })); try std.testing.expectError(Error.InvalidAgentSpec, validate(.{ .version = 1, .provider = .{ .name = "", .model = "model" }, })); try std.testing.expectError(Error.InvalidAgentSpec, validate(.{ .version = 1, .provider = .{ .name = "openai", .model = "" }, })); try std.testing.expectError(Error.InvalidAgentSpec, validate(.{ .version = 1, .provider = .{ .name = "openai", .model = "model", .base_url = "" }, })); try std.testing.expectError(Error.InvalidAgentSpec, validate(.{ .version = 1, .provider = .{ .name = "openai", .model = "model", .api_key = .{ .env = "" } }, })); try std.testing.expectError(Error.InvalidAgentSpec, validate(.{ .version = 1, .provider = .{ .name = "openai", .model = "model", .api_key = .{ .env = "1KEY" } }, })); const too_many_instructions: [65][]const u8 = @splat("instruction"); try std.testing.expectError(Error.InvalidAgentSpec, validate(.{ .version = 1, .provider = valid_provider, .instructions = &too_many_instructions, })); const empty_instruction = [_][]const u8{""}; try std.testing.expectError(Error.InvalidAgentSpec, validate(.{ .version = 1, .provider = valid_provider, .instructions = &empty_instruction, })); const too_many_capabilities: [257]CapabilitySpec = @splat(.{ .id = "same" }); try std.testing.expectError(Error.InvalidAgentSpec, validate(.{ .version = 1, .provider = valid_provider, .capabilities = &too_many_capabilities, })); const invalid_capability = [_]CapabilitySpec{.{ .id = "-invalid" }}; try std.testing.expectError(Error.InvalidAgentSpec, validate(.{ .version = 1, .provider = valid_provider, .capabilities = &invalid_capability, }));}
test "agent specification parsers enforce the document byte limit" { const limit = json_limits.defaults.cli_config.max_document_bytes; const source = try std.testing.allocator.alloc(u8, limit + 1); defer std.testing.allocator.free(source); @memset(source, 'x'); try std.testing.expectError(error.DocumentTooLarge, parseJson(std.testing.allocator, source)); try std.testing.expectError(error.DocumentTooLarge, parseYaml(std.testing.allocator, source));}
fn checkAllocationFailure(gpa: std.mem.Allocator) !void { var parsed = try parseYaml(gpa, \\version: 1 \\provider: \\ name: openai \\ model: gpt-5-mini \\capabilities: \\- id: search ); parsed.deinit();}
test "agent specification parsing releases every partial allocation" { try std.testing.checkAllAllocationFailures(@import("testing.zig").non_resizing_allocator, checkAllocationFailure, .{});}
const ResolutionTestState = struct { validate_count: usize = 0, build_count: usize = 0, cleanup_count: usize = 0, expected_model: []const u8 = "model-prod", expected_base_url: []const u8 = "https://api.example.test/${literal}", expected_key: []const u8 = "secret", expected_has_api_key: bool = true, fail_build: bool = false,
fn environment(_: *anyopaque, name: []const u8) ?[]const u8 { if (std.mem.eql(u8, name, "MODEL")) return "model-prod"; if (std.mem.eql(u8, name, "HOST")) return "api.example.test"; if (std.mem.eql(u8, name, "ROLE")) return "support"; if (std.mem.eql(u8, name, "API_KEY")) return "secret"; if (std.mem.eql(u8, name, "EMPTY")) return ""; return null; }
fn validate(context: *anyopaque, input: ProviderValidationInput) ProviderResolutionError!void { const self: *@This() = @ptrCast(@alignCast(context)); self.validate_count += 1; if (!std.mem.eql(u8, input.name, "openai")) return error.UnknownProvider; if (!std.mem.eql(u8, input.model, self.expected_model)) return error.UnknownModel; if (!std.mem.eql(u8, input.base_url.?, self.expected_base_url)) return error.InvalidProviderConfiguration; if (input.has_api_key != self.expected_has_api_key) return error.InvalidProviderConfiguration; }
fn build(context: *anyopaque, arena: std.mem.Allocator, input: ProviderInput) !ModelHandle { const self: *@This() = @ptrCast(@alignCast(context)); self.build_count += 1; if (self.fail_build) return error.TestBuildFailed; if (self.expected_has_api_key and !std.mem.eql(u8, input.api_key.?, self.expected_key)) { return error.InvalidProviderConfiguration; } const client = try arena.create(ResolutionTestClient); client.* = .{ .state = self, .model_name = try arena.dupe(u8, input.model) }; return .{ .model = .{ .context = client, .profile = .{}, .provider_name = "test", .model_name = client.model_name, .requestFn = ResolutionTestClient.request, }, .cleanup_context = self, .cleanupFn = cleanup, }; }
fn cleanup(context: *anyopaque) void { const self: *@This() = @ptrCast(@alignCast(context)); self.cleanup_count += 1; }
fn provider(self: *@This()) ProviderResolver { return .{ .context = self, .validateFn = ResolutionTestState.validate, .buildFn = ResolutionTestState.build }; }};
const ResolutionTestClient = struct { state: *ResolutionTestState, model_name: []const u8,
fn request(_: *anyopaque, _: std.mem.Allocator, _: model_types.ModelRequest) !model_types.ModelResponse { return .{ .parts = &.{} }; }};
const ResolutionTestCapabilities = struct { fn get(_: *anyopaque, id: []const u8) ?agent_types.Capability { if (std.mem.eql(u8, id, "search")) return .{ .id = "search", .dependencies = &.{"auth"}, }; if (std.mem.eql(u8, id, "auth")) return .{ .id = "auth" }; if (std.mem.eql(u8, id, "mismatch")) return .{ .id = "other" }; if (std.mem.eql(u8, id, "broken")) return .{ .id = "broken", .conflicts = &.{"absent"}, }; return null; }
fn resolver() CapabilityResolver { return .{ .context = undefined, .getFn = get }; }};
fn resolutionOptions(state: *ResolutionTestState) ResolutionOptions { return .{ .environment = .{ .context = state, .getFn = ResolutionTestState.environment }, .environment_policy = .{ .fields = .{ .model = true, .base_url = true, .system_prompt = true, .instructions = true }, .interpolation_names = &.{ "MODEL", "HOST", "ROLE" }, .secret_names = &.{"API_KEY"}, }, .provider = state.provider(), .capabilities = ResolutionTestCapabilities.resolver(), };}
test "agent resolution is dry-runnable and builds an owned agent" { var state = ResolutionTestState{}; const spec = Spec{ .version = 1, .provider = .{ .name = "openai", .model = "${MODEL}", .base_url = "https://${HOST}/$${literal}", .api_key = .{ .env = "API_KEY" }, }, .system_prompt = "You are ${ROLE}.", .instructions = &.{ "Help ${ROLE} users.", "$${ROLE}" }, .capabilities = &.{.{ .id = "search", .loading = .on_demand, .unload_policy = .run_end, }}, }; const options = resolutionOptions(&state); try validateResolution(std.testing.allocator, spec, options); try std.testing.expectEqual(@as(usize, 1), state.validate_count); try std.testing.expectEqual(@as(usize, 0), state.build_count);
var resolved = try resolve(std.testing.allocator, spec, options); try std.testing.expectEqual(@as(usize, 2), state.validate_count); try std.testing.expectEqual(@as(usize, 1), state.build_count); try std.testing.expectEqualStrings("You are support.", resolved.agent.system_prompt.?); try std.testing.expectEqualStrings("Help support users.", resolved.agent.instructions[0].text); try std.testing.expectEqualStrings("${ROLE}", resolved.agent.instructions[1].text); try std.testing.expectEqual(@as(usize, 2), resolved.agent.capabilities.len); try std.testing.expectEqualStrings("search", resolved.agent.capabilities[0].id.?); try std.testing.expectEqual(capability_types.Loading.on_demand, resolved.agent.capabilities[0].loading); try std.testing.expectEqual(capability_types.UnloadPolicy.run_end, resolved.agent.capabilities[0].unload_policy); try std.testing.expectEqualStrings("auth", resolved.agent.capabilities[1].id.?); try std.testing.expectEqualStrings("model-prod", resolved.agent.model.model_name.?); const response = try resolved.agent.model.request(std.testing.allocator, .{ .messages = &.{} }); try std.testing.expectEqual(@as(usize, 0), response.parts.len); resolved.deinit(); try std.testing.expectEqual(@as(usize, 1), state.cleanup_count);}
test "agent resolution leaves interpolation disabled unless explicitly enabled" { var state = ResolutionTestState{ .expected_model = "${MODEL}", .expected_base_url = "https://${HOST}", }; const spec = Spec{ .version = 1, .provider = .{ .name = "openai", .model = "${MODEL}", .base_url = "https://${HOST}", .api_key = .{ .env = "API_KEY" }, }, }; try validateResolution(std.testing.allocator, spec, .{ .environment = .{ .context = &state, .getFn = ResolutionTestState.environment }, .environment_policy = .{ .secret_names = &.{"API_KEY"} }, .provider = state.provider(), });}
test "agent resolution reports environment capability and provider failures" { var state = ResolutionTestState{ .expected_base_url = "https://api.example.test/plain", .expected_has_api_key = false, }; const base = Spec{ .version = 1, .provider = .{ .name = "openai", .model = "model-prod", .base_url = "https://api.example.test/plain" }, }; var options = resolutionOptions(&state); try std.testing.expectError(ResolutionError.EnvironmentVariableNotAllowed, validateResolution( std.testing.allocator, .{ .version = 1, .provider = .{ .name = "openai", .model = "model-prod", .api_key = .{ .env = "OTHER" } } }, options, )); options.environment = null; try std.testing.expectError(ResolutionError.MissingEnvironmentVariable, validateResolution( std.testing.allocator, .{ .version = 1, .provider = .{ .name = "openai", .model = "${MODEL}" } }, options, )); options = resolutionOptions(&state); options.environment_policy.secret_names = &.{"EMPTY"}; try std.testing.expectError(ResolutionError.EmptySecret, validateResolution( std.testing.allocator, .{ .version = 1, .provider = .{ .name = "openai", .model = "model-prod", .api_key = .{ .env = "EMPTY" } } }, options, )); options = resolutionOptions(&state); try std.testing.expectError(ResolutionError.InvalidEnvironmentInterpolation, validateResolution( std.testing.allocator, .{ .version = 1, .provider = .{ .name = "openai", .model = "${BAD-NAME}" } }, options, )); try std.testing.expectError(ResolutionError.InvalidEnvironmentInterpolation, validateResolution( std.testing.allocator, .{ .version = 1, .provider = .{ .name = "openai", .model = "${MODEL" } }, options, )); try std.testing.expectError(ResolutionError.EnvironmentVariableNotAllowed, validateResolution( std.testing.allocator, .{ .version = 1, .provider = .{ .name = "openai", .model = "${OTHER}" } }, options, )); try std.testing.expectError(ResolutionError.MissingEnvironmentVariable, validateResolution( std.testing.allocator, .{ .version = 1, .provider = .{ .name = "openai", .model = "${MISSING}" } }, .{ .environment = options.environment, .environment_policy = .{ .fields = .{ .model = true }, .interpolation_names = &.{"MISSING"} }, .provider = options.provider, }, )); try std.testing.expectError(ResolutionError.UnknownCapability, validateResolution( std.testing.allocator, .{ .version = 1, .provider = base.provider, .capabilities = &.{.{ .id = "missing" }} }, options, )); options.capabilities = null; try std.testing.expectError(ResolutionError.UnknownCapability, validateResolution( std.testing.allocator, .{ .version = 1, .provider = base.provider, .capabilities = &.{.{ .id = "search" }} }, options, )); options = resolutionOptions(&state); try std.testing.expectError(ResolutionError.InvalidCapabilityImplementation, validateResolution( std.testing.allocator, .{ .version = 1, .provider = base.provider, .capabilities = &.{.{ .id = "mismatch" }} }, options, )); try std.testing.expectError(ResolutionError.InvalidCapabilityComposition, validateResolution( std.testing.allocator, .{ .version = 1, .provider = base.provider, .capabilities = &.{.{ .id = "broken" }} }, options, ));
state.expected_model = "other"; try std.testing.expectError(error.UnknownModel, validateResolution(std.testing.allocator, base, options));
state.expected_model = "model-prod"; state.expected_key = "different"; state.expected_has_api_key = true; try std.testing.expectError(error.InvalidProviderConfiguration, resolve(std.testing.allocator, .{ .version = 1, .provider = .{ .name = "openai", .model = "model-prod", .base_url = "https://api.example.test/plain", .api_key = .{ .env = "API_KEY" }, }, }, options)); state.expected_key = "secret"; state.fail_build = true; try std.testing.expectError(error.TestBuildFailed, resolve(std.testing.allocator, .{ .version = 1, .provider = .{ .name = "openai", .model = "model-prod", .base_url = "https://api.example.test/plain", .api_key = .{ .env = "API_KEY" }, }, }, options));}
fn checkResolutionAllocationFailure(gpa: std.mem.Allocator) !void { var state = ResolutionTestState{}; var resolved = try resolve(gpa, .{ .version = 1, .provider = .{ .name = "openai", .model = "${MODEL}", .base_url = "https://${HOST}/$${literal}", .api_key = .{ .env = "API_KEY" }, }, .system_prompt = "${ROLE}", .instructions = &.{"${ROLE}"}, .capabilities = &.{.{ .id = "search" }}, }, resolutionOptions(&state)); resolved.deinit();}
test "agent resolution releases every partial allocation" { try std.testing.checkAllAllocationFailures(@import("testing.zig").non_resizing_allocator, checkResolutionAllocationFailure, .{});}