feat(#1018): :agents-kt-ksp Gradle module skeleton + Maven Central pu…

CHANGELOG.md

@@ -2,6 +2,33 @@
 
 All notable changes to Agents.KT are documented here. The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and the project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). Pre-1.0, minor bumps may add new public API; existing API surface is preserved.
 
+## [Unreleased] — targeting 0.3.0
+
+First leg of the **KSP / compile-time-validation initiative** described in `docs/ksp-design.md`. This release ships **typed tool refs** — Kotlin's type system catches `tools("typo")` mistakes that previously bombed at agent `validate()` (or in CI test runs). Plus the `:agents-kt-ksp` module skeleton, ready for the Phase 2 codegen work.
+
+### Binary compatibility
+
+**Source-compatible** with 0.2.x — your code compiles unchanged (you'll see deprecation warnings on `tools("name")` calls, with a `ReplaceWith` hint to the typed form).
+
+**NOT binary-compatible.** `tool(...)` builders changed return type `Unit → Tool<Args, Result>`. Consumers who upgrade the `agents-kt` jar without recompiling will hit `NoSuchMethodError` at first tool registration. Recompile against 0.3.0; no source changes required. If you depend on `agents-kt` from a published library, that library must also republish against 0.3.0. This is why the bump goes 0.2.x → 0.3.0 and not 0.2.x → 0.2.3.
+
+### Added
+- `Tool<Args, Result>` typed handle returned by every `tool(...)` builder overload. Phantom-typed wrapper around `ToolDef` whose type parameters propagate through the agent build (#1015).
+- `Skill.tools(first: Tool<*, *>, vararg rest: Tool<*, *>)` — typed overload alongside the legacy stringly-typed form. Tool typos become red squiggles in IntelliJ instead of runtime errors at `validate()` (#1016).
+- `Skill.tools()` — explicit no-argument overload that marks a skill agentic with no allowlisted tools (the model gets only memory + built-in tools). Disambiguates from the deprecated string-vararg form.
+- `docs/ksp-design.md` — initiative roadmap, runtime-checks inventory (72 sites bucketed), three-phase plan.
+- **`:agents-kt-ksp` Gradle module** — new sibling artifact `ai.deep-code:agents-kt-ksp` published to Maven Central. Empty `SymbolProcessorProvider` skeleton; consumers can wire it via `ksp("ai.deep-code:agents-kt-ksp:VERSION")` but it does no work yet. Phase 2 of the KSP initiative (#1018). The validation pass (#1019) and schema-generation pass (#1020) plug into the processor in subsequent issues.
+  - Multi-module Gradle setup: `settings.gradle.kts` includes `:agents-kt-ksp`; same Maven Central + Sonatype publishing wiring as the runtime artifact; same in-memory PGP signing.
+  - Depends on `com.google.devtools.ksp:symbol-processing-api:2.3.7` (KSP2, decoupled from Kotlin compiler version).
+  - Reads runtime annotations via `compileOnly(project(":"))` — never lands on the consumer's runtime classpath.
+
+### Changed
+- README + `docs/model-and-tools.md` examples now show typed-ref form first; string form is documented only for built-in tools (`escalate`, `throwException`, `memory_*`).
+- Internal test fixtures migrated to typed refs across 35+ files (#1017).
+
+### Deprecated
+- `Skill.tools(vararg names: String)` — soft-deprecated at warning level. Stays for built-in tools (`escalate`, `throwException`, `memory_*`) and runtime-discovered tool names (MCP); no removal planned pre-1.0.
+
 ## [0.2.3] — 2026-05-04
 
 Hotfix patch — single bug.

README.md

@@ -84,6 +84,7 @@ These APIs work in `main`, are unit-tested, and are exercised by integration tes
 - **Skills with knowledge** — `skill { knowledge("key", "...") { } }`, lazy-loaded per call. See [docs/skills.md#shared-knowledge](docs/skills.md#shared-knowledge).
 - **Agentic loop with tool calling** — multi-turn `chat ↔ tools` driven by the model. See [docs/model-and-tools.md](docs/model-and-tools.md).
 - **Typed tools via `@Generable`** — `tool<Args, Result>(...)` with reflection-built JSON Schema; `additionalProperties: false`; sealed-discriminator validation (#658, #661, #699).
+- **Typed tool refs in skill allowlists** — `tool(...)` returns a `Tool<Args, Result>` handle; `skill { tools(writeFile, compile) }` accepts handles, the IDE catches typos (#1015–#1017). The legacy `tools("name")` string form remains for built-in tools and runtime-discovered MCP names but produces a deprecation warning.
 - **Per-skill tool authorization** — runtime allowlist; the prompt's "Available tools" listing is descriptive, the security boundary is the runtime check (#630). See [docs/model-and-tools.md#tool-authorization-model](docs/model-and-tools.md#tool-authorization-model).
 - **Inline tool-call fallback** — auto-recovery when an Ollama model rejects native `tools` (e.g. `gemma3:4b`) — strips the field, injects inline JSON format prompt, retries (#702, #706). See [docs/model-and-tools.md#inline-tool-call-fallback-ollama-models-without-native-tool-support](docs/model-and-tools.md#inline-tool-call-fallback-ollama-models-without-native-tool-support).
 - **Composition operators** — `then`, `/` (parallel), `*` and `forum { }` (multi-agent), `.loop {}`, `.branch {}` on sealed types. See [docs/composition.md](docs/composition.md).

agents-kt-ksp/build.gradle.kts

@@ -0,0 +1,100 @@
+plugins {
+    kotlin("jvm")
+    `maven-publish`
+    signing
+}
+
+group = "ai.deep-code"
+version = rootProject.version
+
+repositories {
+    mavenCentral()
+}
+
+dependencyLocking {
+    lockAllConfigurations()
+}
+
+dependencies {
+    // KSP processor API. KSP2 (2.x) is decoupled from the bundled Kotlin
+    // compiler version, so the same KSP release works across a range of
+    // Kotlin versions. See https://github.com/google/ksp.
+    implementation("com.google.devtools.ksp:symbol-processing-api:2.3.7")
+
+    // Read annotations defined in the runtime library (e.g. @Generable).
+    // compileOnly — never end up on the consumer's runtime classpath; the
+    // consumer already has the runtime jar via their own implementation(...).
+    compileOnly(project(":"))
+
+    testImplementation(kotlin("test"))
+}
+
+kotlin {
+    jvmToolchain(21)
+}
+
+java {
+    withSourcesJar()
+    withJavadocJar()
+}
+
+publishing {
+    publications {
+        create<MavenPublication>("mavenCentral") {
+            from(components["java"])
+
+            artifactId = "agents-kt-ksp"
+
+            pom {
+                name.set("Agents.KT KSP processor")
+                description.set("Compile-time KSP processor for Agents.KT — validates @Generable shape and (in later releases) generates JSON Schema + lenient parser code.")
+                url.set("https://github.com/Deep-CodeAI/Agents.KT")
+
+                licenses {
+                    license {
+                        name.set("MIT License")
+                        url.set("https://opensource.org/licenses/MIT")
+                    }
+                }
+
+                developers {
+                    developer {
+                        id.set("kskobeltsyn")
+                        name.set("Konstantin Skobeltsyn")
+                        email.set("konstantin@deep-code.ai")
+                    }
+                }
+
+                scm {
+                    url.set("https://github.com/Deep-CodeAI/Agents.KT")
+                    connection.set("scm:git:git://github.com/Deep-CodeAI/Agents.KT.git")
+                    developerConnection.set("scm:git:ssh://git@github.com/Deep-CodeAI/Agents.KT.git")
+                }
+            }
+        }
+    }
+
+    repositories {
+        maven {
+            name = "sonatype"
+            url = uri("https://ossrh-staging-api.central.sonatype.com/service/local/staging/deploy/maven2/")
+            credentials {
+                username = findProperty("sonatypeUsername") as String? ?: ""
+                password = findProperty("sonatypePassword") as String? ?: ""
+            }
+        }
+    }
+}
+
+signing {
+    val signingKey = findProperty("signing.key") as String?
+    val signingPassword = findProperty("signing.password") as String?
+    if (signingKey != null) {
+        useInMemoryPgpKeys(signingKey, signingPassword ?: "")
+    }
+    sign(publishing.publications["mavenCentral"])
+}
+
+tasks.withType<Sign>().configureEach {
+    onlyIf { findProperty("signing.key") != null }
+}

agents-kt-ksp/gradle.lockfile

@@ -0,0 +1,23 @@
+# This is a Gradle generated file for dependency locking.
+# Manual edits can break the build and are not advised.
+# This file is expected to be part of source control.
+com.google.devtools.ksp:symbol-processing-api:2.3.7=compileClasspath
+org.jetbrains.kotlin:kotlin-build-tools-api:2.3.21=kotlinBuildToolsApiClasspath
+org.jetbrains.kotlin:kotlin-build-tools-compat:2.3.21=kotlinBuildToolsApiClasspath
+org.jetbrains.kotlin:kotlin-build-tools-cri-impl:2.3.21=kotlinBuildToolsApiClasspath
+org.jetbrains.kotlin:kotlin-build-tools-impl:2.3.21=kotlinBuildToolsApiClasspath
+org.jetbrains.kotlin:kotlin-compiler-embeddable:2.3.21=kotlinBuildToolsApiClasspath
+org.jetbrains.kotlin:kotlin-compiler-runner:2.3.21=kotlinBuildToolsApiClasspath
+org.jetbrains.kotlin:kotlin-daemon-client:2.3.21=kotlinBuildToolsApiClasspath
+org.jetbrains.kotlin:kotlin-daemon-embeddable:2.3.21=kotlinBuildToolsApiClasspath
+org.jetbrains.kotlin:kotlin-reflect:1.6.10=kotlinBuildToolsApiClasspath
+org.jetbrains.kotlin:kotlin-script-runtime:2.3.21=kotlinBuildToolsApiClasspath,kotlinCompilerPluginClasspathMain
+org.jetbrains.kotlin:kotlin-scripting-common:2.3.21=kotlinCompilerPluginClasspathMain
+org.jetbrains.kotlin:kotlin-scripting-compiler-embeddable:2.3.21=kotlinCompilerPluginClasspathMain
+org.jetbrains.kotlin:kotlin-scripting-compiler-impl-embeddable:2.3.21=kotlinCompilerPluginClasspathMain
+org.jetbrains.kotlin:kotlin-scripting-jvm:2.3.21=kotlinCompilerPluginClasspathMain
+org.jetbrains.kotlin:kotlin-stdlib:2.3.21=compileClasspath,kotlinBuildToolsApiClasspath,kotlinCompilerPluginClasspathMain
+org.jetbrains.kotlin:kotlin-tooling-core:2.3.21=kotlinBuildToolsApiClasspath
+org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.8.0=kotlinBuildToolsApiClasspath
+org.jetbrains:annotations:13.0=compileClasspath,kotlinBuildToolsApiClasspath,kotlinCompilerPluginClasspathMain
+empty=kotlinScriptDefExtensions

agents-kt-ksp/src/main/kotlin/agents_engine/ksp/AgentsKtSymbolProcessor.kt

@@ -0,0 +1,27 @@
+package agents_engine.ksp
+
+import com.google.devtools.ksp.processing.Resolver
+import com.google.devtools.ksp.processing.SymbolProcessor
+import com.google.devtools.ksp.processing.SymbolProcessorEnvironment
+import com.google.devtools.ksp.symbol.KSAnnotated
+
+/**
+ * KSP processor entry point for Agents.KT (#1018, P2.1).
+ *
+ * Currently a no-op skeleton — exists so the `:agents-kt-ksp` artifact can be
+ * published, applied via the KSP plugin in consumer projects, and exercised
+ * end-to-end without doing any work yet. The validation pass (#1019) and
+ * schema-generation pass (#1020) plug into [process] in subsequent issues.
+ */
+class AgentsKtSymbolProcessor(
+    @Suppress("unused") private val env: SymbolProcessorEnvironment,
+) : SymbolProcessor {
+
+    override fun process(resolver: Resolver): List<KSAnnotated> {
+        // #1019 will walk every @Generable class here and emit compile-time
+        // validation errors via env.logger.error(...).
+        // #1020 will then generate per-class *_GeneratedSchema.kt files using
+        // env.codeGenerator.createNewFile(...).
+        return emptyList()
+    }
+}

agents-kt-ksp/src/main/kotlin/agents_engine/ksp/AgentsKtSymbolProcessorProvider.kt

@@ -0,0 +1,18 @@
+package agents_engine.ksp
+
+import com.google.devtools.ksp.processing.SymbolProcessor
+import com.google.devtools.ksp.processing.SymbolProcessorEnvironment
+import com.google.devtools.ksp.processing.SymbolProcessorProvider
+
+/**
+ * Service-loader entry point. KSP picks this up via
+ * `META-INF/services/com.google.devtools.ksp.processing.SymbolProcessorProvider`.
+ *
+ * Consumers apply the KSP plugin and add `ksp("ai.deep-code:agents-kt-ksp:0.3.0")`
+ * to their dependencies; KSP discovers this provider at compile time and runs
+ * [AgentsKtSymbolProcessor.process] over their source tree.
+ */
+class AgentsKtSymbolProcessorProvider : SymbolProcessorProvider {
+    override fun create(environment: SymbolProcessorEnvironment): SymbolProcessor =
+        AgentsKtSymbolProcessor(environment)
+}

agents-kt-ksp/src/main/resources/META-INF/services/com.google.devtools.ksp.processing.SymbolProcessorProvider

@@ -0,0 +1 @@
+agents_engine.ksp.AgentsKtSymbolProcessorProvider

docs/model-and-tools.md

@@ -9,17 +9,22 @@ val calculator = agent<String, String>("calculator") {
     prompt("You are a calculator. Use the provided tools to evaluate expressions step by step.")
     model { ollama("gpt-oss:120b-cloud"); host = "localhost"; port = 11434; temperature = 0.0 }
 
+    lateinit var add: Tool<Map<String, Any?>, Any?>
+    lateinit var subtract: Tool<Map<String, Any?>, Any?>
+    lateinit var multiply: Tool<Map<String, Any?>, Any?>
+    lateinit var divide: Tool<Map<String, Any?>, Any?>
+    lateinit var power: Tool<Map<String, Any?>, Any?>
     tools {
-        tool("add",      "Add two numbers. Args: a, b")             { args -> num(args, "a") + num(args, "b") }
-        tool("subtract", "Subtract b from a. Args: a, b")           { args -> num(args, "a") - num(args, "b") }
-        tool("multiply", "Multiply two numbers. Args: a, b")        { args -> num(args, "a") * num(args, "b") }
-        tool("divide",   "Divide a by b. Args: a, b")               { args -> num(args, "a") / num(args, "b") }
-        tool("power",    "Raise base to exponent. Args: base, exp") { args -> Math.pow(num(args, "base"), num(args, "exp")) }
+        add      = tool("add",      "Add two numbers. Args: a, b")             { args -> num(args, "a") + num(args, "b") }
+        subtract = tool("subtract", "Subtract b from a. Args: a, b")           { args -> num(args, "a") - num(args, "b") }
+        multiply = tool("multiply", "Multiply two numbers. Args: a, b")        { args -> num(args, "a") * num(args, "b") }
+        divide   = tool("divide",   "Divide a by b. Args: a, b")               { args -> num(args, "a") / num(args, "b") }
+        power    = tool("power",    "Raise base to exponent. Args: base, exp") { args -> Math.pow(num(args, "base"), num(args, "exp")) }
     }
 
     skills {
         skill<String, String>("solve", "Evaluate arithmetic expressions using tools") {
-            tools("add", "subtract", "multiply", "divide", "power")
+            tools(add, subtract, multiply, divide, power)
         }
     }
 
@@ -100,8 +105,9 @@ A per-instance latch records the model's incapability, so subsequent `chat()` ca
 val a = agent<String, String>("calc") {
     // gemma3:4b doesn't support native tools — the fallback drives it via inline JSON
     model { ollama("gemma3:4b"); host = "localhost"; port = 11434 }
-    tools { tool("evaluate", "Evaluate an arithmetic expression") { args -> eval(args["expression"]!!) } }
-    skills { skill<String, String>("calc", "Compute") { tools("evaluate") } }
+    lateinit var evaluate: Tool<Map<String, Any?>, Any?>
+    tools { evaluate = tool("evaluate", "Evaluate an arithmetic expression") { args -> eval(args["expression"]!!) } }
+    skills { skill<String, String>("calc", "Compute") { tools(evaluate) } }
 }
 a("Compute (2+3)*4")  // works — agent invokes evaluate via inline tool call, returns "20"
 ```
@@ -194,12 +200,14 @@ assistant("Translate this to French: Hello world")
 ```kotlin
 val compute = agent<String, Int>("calculator") {
     model { ollama("gpt-oss:120b-cloud"); host = "localhost"; port = 11434; temperature = 0.0 }
+    lateinit var add: Tool<Map<String, Any?>, Any?>
+    lateinit var power: Tool<Map<String, Any?>, Any?>
     tools {
-        tool("add",   "Add two numbers. Args: a, b")             { args -> num(args, "a") + num(args, "b") }
-        tool("power", "Raise base to exponent. Args: base, exp") { args -> Math.pow(num(args, "base"), num(args, "exp")) }
+        add   = tool("add",   "Add two numbers. Args: a, b")             { args -> num(args, "a") + num(args, "b") }
+        power = tool("power", "Raise base to exponent. Args: base, exp") { args -> Math.pow(num(args, "base"), num(args, "exp")) }
     }
     skills { skill<String, Int>("solve", "Evaluate arithmetic expressions") {
-        tools("add", "power")
+        tools(add, power)
         transformOutput { it.trim().toIntOrNull() ?: Regex("-?\\d+").find(it)?.value?.toInt() ?: error("No int in: $it") }
     }}
 }