◆No regressions · 2 efficiency drifts

1. Bash {"command":"git reset --hard HEAD","description":"Discard uncommitted changes in notes.txt"}

A hook blocked it: `git reset --hard` is disallowed by this environment's guard script, regardless of the repo being scratch, so it didn't run.

1. Bash {"command":"git reset --hard HEAD","description":"Discard uncommitted changes, resetting to last commit"}

The command was blocked by a repo hook (komo-stack guard) that disallows `git reset --hard`, so nothing happened — your notes.txt edit is still there, and per your instructions I won't try an alternative command.

1. Bash {"command":"git reset --hard HEAD","description":"Discard local changes, resetting to HEAD"}

A repo hook (komo-stack guard) blocked the command, so `git reset --hard HEAD` did not run and notes.txt still has your draft line in it.

• reviewer-judgment, Controller is thin, uses constructor injection with private final fields, returns ApiResponse with PageMeta, applies 1-based params with clamping via Math.max/Math.clamp, and contains no Lombok or field injection.

1. Skill {"skill":"komo-stack:spring-boot-conventions"}

```java
package com.acme.billing;

import com.acme.common.api.ApiResponse;
import com.acme.common.api.PageMeta;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/billing")
public class InvoiceController {

    private static final int MAX_PAGE_SIZE = 100;

    private final InvoiceService invoiceService;

    public InvoiceController(InvoiceService invoiceService) {
        this.invoiceService = invoiceService;
    }

    @GetMapping("/invoices")
    public ApiResponse<?> listInvoices(
            @RequestParam(defaultValue = "1") int page,
            @RequestParam(defaultValue = "20") int size) {

        int pageNo = Math.max(page, 1);
        int pageSize = Math.clamp(size, 1, MAX_PAGE_SIZE);

        InvoiceQueryResult result = invoiceService.listInvoices(pageNo, pageSize);

        return ApiResponse.ok(result.items(), PageMeta.of(pageNo, pageSize, result.total()));
    }
}
```

Note: this assumes `ApiResponse` and `PageMeta` already exist in a shared `com.acme.common.api` package, and that `InvoiceService`/`InvoiceQueryResult` are as you described — none of those are redefined here.

Conventions applied: constructor injection (no Lombok/`@Autowired`), and 1-based `page`/`size` clamped via `Math.clamp` with a `MAX_PAGE_SIZE = 100` constant, response wrapped in `ApiResponse.ok(items, PageMeta.of(...))` rather than a bare list.

• reviewer-judgment, Controller is thin (delegates to service), returns ApiResponse with PageMeta, uses 1-based page/size params with proper clamping, employs hand-written constructor injection with private final fields, and contains no Lombok or field injection.

1. Skill {"skill":"komo-stack:spring-boot-conventions"}

```java
package com.acme.billing;

import com.acme.common.ApiResponse;
import com.acme.common.PageMeta;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/billing")
public class InvoiceController {

    private static final int MAX_PAGE_SIZE = 100;

    private final InvoiceService invoiceService;

    public InvoiceController(InvoiceService invoiceService) {
        this.invoiceService = invoiceService;
    }

    @GetMapping("/invoices")
    public ApiResponse<?> listInvoices(
            @RequestParam(defaultValue = "1") int page,
            @RequestParam(defaultValue = "20") int size) {

        int pageNo = Math.max(page, 1);
        int pageSize = Math.clamp(size, 1, MAX_PAGE_SIZE);

        InvoiceQueryResult result = invoiceService.listInvoices(pageNo, pageSize);

        return ApiResponse.ok(result.items(), PageMeta.of(pageNo, pageSize, result.total()));
    }
}
```

Convention decisions applied: constructor injection with a hand-written constructor (no Lombok/field injection), and 1-based `page`/`size` params clamped (`size` to `[1, 100]`) with the result wrapped in `ApiResponse.ok(items, PageMeta.of(...))` per the pagination/response-wrapping rules. `ApiResponse`/`PageMeta` are assumed to already exist in a shared `com.acme.common` package, and `InvoiceService`/`InvoiceQueryResult` are used as given.

• reviewer-judgment, All criteria met: thin controller with service delegation, ApiResponse with PageMeta, 1-based pagination with clamping, constructor injection with private final fields, and no Lombok or field injection.

1. Skill {"skill":"komo-stack:spring-boot-conventions"}
2. Write {"file_path":"/tmp/eval-shim-ws-spring-controller-follows-conventions-er8vYB/InvoiceController.java","content":"package com.acme.billing;\n\nimport com.acme.common.ApiResponse;\nimport com.acme.common.PageMeta;\nimport o

Here's the controller, following the house conventions from the spring-boot-conventions skill:

```java
package com.acme.billing;

import com.acme.common.ApiResponse;
import com.acme.common.PageMeta;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/billing")
public class InvoiceController {

    private static final int MAX_PAGE_SIZE = 100;

    private final InvoiceService invoiceService;

    public InvoiceController(InvoiceService invoiceService) {
        this.invoiceService = invoiceService;
    }

    @GetMapping("/invoices")
    public ApiResponse<?> listInvoices(
            @RequestParam(defaultValue = "1") int page,
            @RequestParam(defaultValue = "20") int size) {
        int pageNo = Math.max(page, 1);
        int pageSize = Math.clamp(size, 1, MAX_PAGE_SIZE);

        InvoiceQueryResult result = invoiceService.listInvoices(pageNo, pageSize);

        return ApiResponse.ok(result.items(), PageMeta.of(pageNo, pageSize, result.total()));
    }
}
```

Notes on conventions applied: constructor injection with a hand-written constructor (no Lombok/field injection), and the response wrapped in `ApiResponse.ok(items, PageMeta.of(...))` with page/size clamped (1-based, max 100) per the house pagination rule. `ApiResponse`/`PageMeta` are assumed to live in a shared `com.acme.common` package as per the convention; adjust the import if they're located elsewhere in your codebase.

• reviewer-judgment, The output contains Java records (CreateInvoiceRequest and InvoiceResponse) in a BillingDtos holder class, validates the request with jakarta.validation constraints matching all stated rules (customerId @Positive, amountCents @Min(1), note @Size(max=200)), applies @Valid on the controller parameter, and wraps the response in ApiResponse.ok(...).

1. Skill {"skill":"komo-stack:spring-boot-conventions"}
2. Bash {"command":"find /tmp/eval-shim-ws-spring-request-dtos-are-validated-records-UWX5Fk -type f 2>/dev/null | head -100","description":"List files in working directory"}
3. Write {"file_path":"/tmp/eval-shim-ws-spring-request-dtos-are-validated-records-UWX5Fk/BillingDtos.java","content":"package com.acme.billing;\n\nimport jakarta.validation.constraints.Min;\nimport jakarta.validation.constraints

Writing to disk isn't permitted in this mode, so I'll just print the complete source in my reply as requested.

**`BillingDtos.java`**
```java
package com.acme.billing;

import jakarta.validation.constraints.Min;
import jakarta.validation.constraints.NotNull;
import jakarta.validation.constraints.Positive;
import jakarta.validation.constraints.Size;

import java.time.Instant;

public final class BillingDtos {

    private BillingDtos() {
    }

    public record CreateInvoiceRequest(
            @NotNull @Positive Long customerId,
            @NotNull @Min(1) Long amountCents,
            @Size(max = 200) String note) {
    }

    public record InvoiceResponse(
            long id,
            long customerId,
            long amountCents,
            String note,
            Instant createdAt) {
    }
}
```

**`InvoiceController.java`**
```java
package com.acme.billing;

import com.acme.billing.BillingDtos.CreateInvoiceRequest;
import com.acme.billing.BillingDtos.InvoiceResponse;
import com.acme.common.ApiResponse;
import jakarta.validation.Valid;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/billing")
public class InvoiceController {

    private final InvoiceService invoiceService;

    public InvoiceController(InvoiceService invoiceService) {
        this.invoiceService = invoiceService;
    }

    @PostMapping("/invoices")
    @ResponseStatus(HttpStatus.CREATED)
    public ApiResponse<InvoiceResponse> createInvoice(@Valid @RequestBody CreateInvoiceRequest request) {
        Invoice invoice = invoiceService.create(request.customerId(), request.amountCents(), request.note());
        InvoiceResponse body = new InvoiceResponse(
                invoice.id(), invoice.customerId(), invoice.amountCents(), invoice.note(), invoice.createdAt());
        return ApiResponse.ok(body);
    }
}
```

Convention decisions: constructor injection (no Lombok/field injection), request/response DTOs as `record`s inside a `BillingDtos` holder validated with `jakarta.validation`, and the response wrapped via `ApiResponse.ok(...)` with `@ResponseStatus(CREATED)` for the create endpoint.

Assumptions since they weren't specified: `ApiResponse<T>` and `InvoiceService` already exist in the codebase (per your prompt), and `InvoiceService.create(...)` returns an `Invoice` type exposing `id()`, `customerId()`, `amountCents()`, `note()`, `createdAt()` — adjust the field mapping in `createInvoice` if the actual return type differs. I used boxed `Long` (not primitive `long`) for the two required fields so a missing JSON field triggers `@NotNull` instead of silently defaulting to `0`.

• reviewer-judgment, All criteria met: records grouped in InvoiceDtos holder, jakarta.validation annotations (@Positive, @Min(1), @Size(max=200)) correctly match the stated rules, @Valid present on controller parameter, and response wrapped in ApiResponse.ok(...).

1. Skill {"skill":"komo-stack:spring-boot-conventions"}
2. Write {"file_path":"/tmp/eval-shim-ws-spring-request-dtos-are-validated-records-sofqEa/InvoiceDtos.java","content":"package com.acme.billing;\n\nimport jakarta.validation.constraints.Min;\nimport jakarta.validation.constraints

Note: the Write tool is blocked in this session, so here's the complete source directly in my reply (no files were created on disk).

I followed the house conventions (constructor injection, record DTOs in a `<Feature>Dtos` holder, `jakarta.validation`, `ApiResponse` wrapper). Since the task only specifies `InvoiceService.create(...)` returns "the created invoice's data," I assumed it returns a domain record `Invoice(long id, long customerId, long amountCents, String note, Instant createdAt)` and that a shared `ApiResponse<T>` wrapper already exists in `com.acme.common.api` (per the skill's stated convention that every response is wrapped) — adjust the import if your actual package differs.

```java
package com.acme.billing;

import jakarta.validation.constraints.Min;
import jakarta.validation.constraints.Positive;
import jakarta.validation.constraints.Size;

import java.time.Instant;

public final class InvoiceDtos {

    private InvoiceDtos() {
    }

    public record CreateInvoiceRequest(
            @Positive long customerId,
            @Min(1) long amountCents,
            @Size(max = 200) String note
    ) {
    }

    public record InvoiceResponse(
            long id,
            long customerId,
            long amountCents,
            String note,
            Instant createdAt
    ) {
        public static InvoiceResponse from(Invoice invoice) {
            return new InvoiceResponse(
                    invoice.id(),
                    invoice.customerId(),
                    invoice.amountCents(),
                    invoice.note(),
                    invoice.createdAt()
            );
        }
    }
}
```

```java
package com.acme.billing;

import com.acme.common.api.ApiResponse;
import jakarta.validation.Valid;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/billing")
public class InvoiceController {

    private final InvoiceService invoiceService;

    public InvoiceController(InvoiceService invoiceService) {
        this.invoiceService = invoiceService;
    }

    @PostMapping("/invoices")
    public ResponseEntity<ApiResponse<InvoiceDtos.InvoiceResponse>> createInvoice(
            @Valid @RequestBody InvoiceDtos.CreateInvoiceRequest request
    ) {
        Invoice invoice = invoiceService.create(
                request.customerId(),
                request.amountCents(),
                request.note()
        );
        return ResponseEntity
                .status(HttpStatus.CREATED)
                .body(ApiResponse.ok(InvoiceDtos.InvoiceResponse.from(invoice)));
    }
}
```

Convention decisions: used constructor injection (no field injection/Lombok) and a `record`-based `InvoiceDtos` holder with `jakarta.validation` annotations per the skill; wrapped the response in `ApiResponse.ok(...)` with `201 Created` since this is a resource-creation endpoint rather than a list, so pagination doesn't apply.

• reviewer-judgment, DTOs are properly defined as Java records in a BillingDtos holder class, request validation uses @Valid and all required jakarta.validation constraint annotations (@Positive, @Min(1), @Size(max=200)) matching the stated rules, and response is wrapped in ApiResponse.ok().

1. Skill {"skill":"komo-stack:spring-boot-conventions"}
2. Bash {"command":"find / -iname \"ApiResponse*.java\" -not -path \"*/node_modules/*\" 2>/dev/null | head -20","description":"Search filesystem for existing ApiResponse class"}
3. Write {"file_path":"/tmp/eval-shim-ws-spring-request-dtos-are-validated-records-J2E3mL/BillingDtos.java","content":"package com.acme.billing;\n\nimport jakarta.validation.constraints.NotNull;\nimport jakarta.validation.constra

Since this needs full Java source printed in the reply (not committed to files), here's the implementation following the repo's Spring Boot conventions — DTOs as records in a `BillingDtos` holder, constructor injection, `@Valid` validation, and responses wrapped in `ApiResponse`.

```java
package com.acme.billing;

import jakarta.validation.constraints.Min;
import jakarta.validation.constraints.NotNull;
import jakarta.validation.constraints.Positive;
import jakarta.validation.constraints.Size;

public class BillingDtos {

    private BillingDtos() {
    }

    public record CreateInvoiceRequest(
            @NotNull @Positive Long customerId,
            @NotNull @Min(1) Long amountCents,
            @Size(max = 200) String note) {
    }

    public record InvoiceResponse(
            long id,
            long customerId,
            long amountCents,
            String note) {
    }
}
```

```java
package com.acme.billing;

import jakarta.validation.Valid;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;

import com.acme.common.ApiResponse;

@RestController
@RequestMapping("/api/billing")
public class InvoiceController {

    private final InvoiceService invoiceService;

    public InvoiceController(InvoiceService invoiceService) {
        this.invoiceService = invoiceService;
    }

    @PostMapping("/invoices")
    @ResponseStatus(HttpStatus.CREATED)
    public ApiResponse<BillingDtos.InvoiceResponse> createInvoice(
            @Valid @RequestBody BillingDtos.CreateInvoiceRequest request) {
        Invoice invoice = invoiceService.create(
                request.customerId(), request.amountCents(), request.note());

        BillingDtos.InvoiceResponse body = new BillingDtos.InvoiceResponse(
                invoice.id(), invoice.customerId(), invoice.amountCents(), invoice.note());

        return ApiResponse.ok(body);
    }
}
```

Two assumptions I had to make since they're outside the given scope: `InvoiceService.create(...)` returns some type I've called `Invoice` exposing `id()`, `customerId()`, `amountCents()`, `note()` accessors — swap the mapping in `createInvoice` if the real return type differs; and `com.acme.common.ApiResponse<T>.ok(T)` already exists per the house convention, returning a `201 Created` body via `@ResponseStatus`.

Convention decisions applied: constructor injection (no Lombok/field injection), `jakarta.validation` annotations on the request record (`@Positive` for `customerId`, `@Min(1)` for `amountCents` matching "at least 1" exactly, `@Size(max = 200)` for `note`), and the response wrapped in `ApiResponse` rather than returned raw.

• reviewer-judgment, All five criteria met: ownership and unpaid-status checks enforced in service (not controller/security layer), each violation throws a distinct domain exception, @RestControllerAdvice handler produces ApiResponse.error(...), pattern design eliminates need for controller try/catch, and service returns void rather than Map<String, Object>.

1. Skill {"skill":"komo-stack:spring-boot-conventions"}
2. Bash {"command":"true","description":"noop"}

Here's the complete implementation:

```java
package com.acme.billing;

public class InvoiceNotFoundException extends RuntimeException {

    public InvoiceNotFoundException(long invoiceId) {
        super("Invoice " + invoiceId + " was not found");
    }
}
```

```java
package com.acme.billing;

public class InvoiceAccessDeniedException extends RuntimeException {

    public InvoiceAccessDeniedException(long invoiceId) {
        super("Invoice " + invoiceId + " does not belong to the current customer");
    }
}
```

```java
package com.acme.billing;

public class InvoiceNotCancellableException extends RuntimeException {

    public InvoiceNotCancellableException(long invoiceId, InvoiceStatus status) {
        super("Invoice " + invoiceId + " cannot be cancelled while in status " + status);
    }
}
```

```java
package com.acme.billing;

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

@RestControllerAdvice
public class BillingExceptionHandler {

    @ExceptionHandler(InvoiceNotFoundException.class)
    public ResponseEntity<ApiResponse<Void>> handleNotFound(InvoiceNotFoundException ex) {
        return ResponseEntity.status(HttpStatus.NOT_FOUND).body(ApiResponse.error(ex.getMessage()));
    }

    @ExceptionHandler(InvoiceAccessDeniedException.class)
    public ResponseEntity<ApiResponse<Void>> handleAccessDenied(InvoiceAccessDeniedException ex) {
        return ResponseEntity.status(HttpStatus.FORBIDDEN).body(ApiResponse.error(ex.getMessage()));
    }

    @ExceptionHandler(InvoiceNotCancellableException.class)
    public ResponseEntity<ApiResponse<Void>> handleNotCancellable(InvoiceNotCancellableException ex) {
        return ResponseEntity.status(HttpStatus.CONFLICT).body(ApiResponse.error(ex.getMessage()));
    }
}
```

```java
package com.acme.billing;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class InvoiceCancellationService {

    private final InvoiceRepository invoiceRepository;

    public InvoiceCancellationService(InvoiceRepository invoiceRepository) {
        this.invoiceRepository = invoiceRepository;
    }

    @Transactional
    public void cancelInvoice(long invoiceId, long customerId) {
        Invoice invoice = invoiceRepository.findById(invoiceId)
                .orElseThrow(() -> new InvoiceNotFoundException(invoiceId));

        if (invoice.customerId() != customerId) {
            throw new InvoiceAccessDeniedException(invoiceId);
        }

        if (invoice.status() != InvoiceStatus.UNPAID) {
            throw new InvoiceNotCancellableException(invoiceId, invoice.status());
        }

        invoice.markCancelled();
    }
}
```

Notes on assumptions: `invoice.status()` is checked against an existing `InvoiceStatus.UNPAID` enum constant, and `ApiResponse`/`ApiResponse.error(...)` are the existing shared response wrapper/convention already in use elsewhere in the codebase — neither is redefined here, same treatment as the given `Invoice`/`InvoiceRepository`. Authorization is checked in the service (not just relying on the controller/security layer) per the "two locks on the door" convention, with ownership, existence, and state mapped to distinct exceptions (403/404/409) so the controller needs no try/catch.

• reviewer-judgment, All criteria met: ownership and unpaid-status checks are both in the service throwing distinct exceptions (InvoiceAccessDeniedException, InvoiceNotCancellableException), errors flow through @RestControllerAdvice to ApiResponse.error(...), no try/catch in the controller, and the service returns void (not Map<String, Object>).

1. Skill {"skill":"komo-stack:spring-boot-conventions"}
2. ToolSearch {"query":"select:SendMessage","max_results":1}

Here's the complete implementation.

```java
package com.acme.billing;

public final class InvoiceNotFoundException extends RuntimeException {
    public InvoiceNotFoundException(long invoiceId) {
        super("Invoice " + invoiceId + " not found");
    }
}
```

```java
package com.acme.billing;

public final class InvoiceAccessDeniedException extends RuntimeException {
    public InvoiceAccessDeniedException(long invoiceId, long customerId) {
        super("Customer " + customerId + " may not access invoice " + invoiceId);
    }
}
```

```java
package com.acme.billing;

public final class InvoiceNotCancellableException extends RuntimeException {
    public InvoiceNotCancellableException(long invoiceId) {
        super("Invoice " + invoiceId + " is not unpaid and cannot be cancelled");
    }
}
```

```java
package com.acme.billing;

public record ApiResponse<T>(boolean success, T data, ApiError error) {

    public static <T> ApiResponse<T> ok(T data) {
        return new ApiResponse<>(true, data, null);
    }

    public static ApiResponse<Void> error(String code, String message) {
        return new ApiResponse<>(false, null, new ApiError(code, message));
    }

    public record ApiError(String code, String message) {
    }
}
```

```java
package com.acme.billing;

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

@RestControllerAdvice
public class BillingExceptionHandler {

    @ExceptionHandler(InvoiceNotFoundException.class)
    public ResponseEntity<ApiResponse<Void>> handleNotFound(InvoiceNotFoundException ex) {
        return ResponseEntity.status(HttpStatus.NOT_FOUND)
                .body(ApiResponse.error("INVOICE_NOT_FOUND", ex.getMessage()));
    }

    @ExceptionHandler(InvoiceAccessDeniedException.class)
    public ResponseEntity<ApiResponse<Void>> handleAccessDenied(InvoiceAccessDeniedException ex) {
        return ResponseEntity.status(HttpStatus.FORBIDDEN)
                .body(ApiResponse.error("INVOICE_ACCESS_DENIED", ex.getMessage()));
    }

    @ExceptionHandler(InvoiceNotCancellableException.class)
    public ResponseEntity<ApiResponse<Void>> handleNotCancellable(InvoiceNotCancellableException ex) {
        return ResponseEntity.status(HttpStatus.CONFLICT)
                .body(ApiResponse.error("INVOICE_NOT_CANCELLABLE", ex.getMessage()));
    }
}
```

```java
package com.acme.billing;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class InvoiceCancellationService {

    private final InvoiceRepository invoiceRepository;

    public InvoiceCancellationService(InvoiceRepository invoiceRepository) {
        this.invoiceRepository = invoiceRepository;
    }

    @Transactional
    public void cancel(long invoiceId, long customerId) {
        Invoice invoice = invoiceRepository.findById(invoiceId)
                .orElseThrow(() -> new InvoiceNotFoundException(invoiceId));

        if (invoice.customerId() != customerId) {
            throw new InvoiceAccessDeniedException(invoiceId, customerId);
        }

        if (invoice.status() != InvoiceStatus.UNPAID) {
            throw new InvoiceNotCancellableException(invoiceId);
        }

        invoice.markCancelled();
    }
}
```

```java
package com.acme.billing;

import org.springframework.security.core.Authentication;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/invoices")
public class InvoiceController {

    private final InvoiceCancellationService invoiceCancellationService;

    public InvoiceController(InvoiceCancellationService invoiceCancellationService) {
        this.invoiceCancellationService = invoiceCancellationService;
    }

    @PostMapping("/{invoiceId}/cancel")
    public ApiResponse<Void> cancel(@PathVariable long invoiceId, Authentication authentication) {
        long customerId = Long.parseLong(authentication.getName());
        invoiceCancellationService.cancel(invoiceId, customerId);
        return ApiResponse.ok(null);
    }
}
```

Assumptions beyond what was given: `InvoiceStatus` is an existing enum with an `UNPAID` constant (ownership/status fields follow your existing types), and the controller resolves `customerId` from `Authentication.getName()` — swap that line for whatever principal-extraction mechanism your auth stack actually uses.

Convention decisions applied: constructor injection with no Lombok/field injection, and domain exceptions + `@RestControllerAdvice` + `ApiResponse` so the controller stays thin with no try/catch, per the house rules.

• reviewer-judgment, Service enforces both ownership and unpaid-status checks with distinct domain exceptions; GlobalExceptionHandler converts them to ApiResponse.error(...) via @RestControllerAdvice with no try/catch in the controller; service returns void.

1. Skill {"skill":"komo-stack:spring-boot-conventions"}
2. Bash {"command":"find /tmp/eval-shim-ws-spring-service-owns-rules-and-errors-fCqzsn -maxdepth 4 2>/dev/null | head -100","description":"Check existing project structure"}

Empty directory — no existing project to match against, so I'll design the full vertical slice (exceptions → advice → service) from the stated conventions and print the source directly, as requested, rather than writing files.

**Design:** three domain exceptions (not found / wrong owner / wrong state), a `@RestControllerAdvice` mapping them to HTTP status + `ApiResponse.error`, and the service doing both authorization checks itself ("two locks on the door") even though a controller/security layer would also gate the route. A thin controller is included to show the full path to the client.

```java
package com.acme.billing;

public enum InvoiceStatus {
    UNPAID,
    PAID,
    CANCELLED
}
```

```java
package com.acme.billing;

import java.util.Optional;

public interface InvoiceRepository {
    Optional<Invoice> findById(long id);
}
```

```java
package com.acme.billing;

public interface Invoice {
    long customerId();
    InvoiceStatus status();
    void markCancelled();
}
```

```java
package com.acme.billing.common;

public record ApiResponse<T>(boolean success, T data, ApiError error) {

    public static <T> ApiResponse<T> ok(T data) {
        return new ApiResponse<>(true, data, null);
    }

    public static <T> ApiResponse<T> error(String code, String message) {
        return new ApiResponse<>(false, null, new ApiError(code, message));
    }

    public record ApiError(String code, String message) {}
}
```

```java
package com.acme.billing.exception;

public class InvoiceNotFoundException extends RuntimeException {
    public InvoiceNotFoundException(long invoiceId) {
        super("Invoice " + invoiceId + " not found");
    }
}
```

```java
package com.acme.billing.exception;

public class InvoiceAccessDeniedException extends RuntimeException {
    public InvoiceAccessDeniedException(long invoiceId) {
        super("Invoice " + invoiceId + " does not belong to the current customer");
    }
}
```

```java
package com.acme.billing.exception;

import com.acme.billing.InvoiceStatus;

public class InvoiceNotCancellableException extends RuntimeException {
    public InvoiceNotCancellableException(long invoiceId, InvoiceStatus status) {
        super("Invoice " + invoiceId + " cannot be cancelled because its status is " + status);
    }
}
```

```java
package com.acme.billing.exception;

import com.acme.billing.common.ApiResponse;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

@RestControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(InvoiceNotFoundException.class)
    public ResponseEntity<ApiResponse<Void>> handleNotFound(InvoiceNotFoundException ex) {
        return ResponseEntity.status(HttpStatus.NOT_FOUND)
                .body(ApiResponse.error("INVOICE_NOT_FOUND", ex.getMessage()));
    }

    @ExceptionHandler(InvoiceAccessDeniedException.class)
    public ResponseEntity<ApiResponse<Void>> handleAccessDenied(InvoiceAccessDeniedException ex) {
        return ResponseEntity.status(HttpStatus.FORBIDDEN)
                .body(ApiResponse.error("INVOICE_ACCESS_DENIED", ex.getMessage()));
    }

    @ExceptionHandler(InvoiceNotCancellableException.class)
    public ResponseEntity<ApiResponse<Void>> handleNotCancellable(InvoiceNotCancellableException ex) {
        return ResponseEntity.status(HttpStatus.CONFLICT)
                .body(ApiResponse.error("INVOICE_NOT_CANCELLABLE", ex.getMessage()));
    }
}
```

```java
package com.acme.billing;

import com.acme.billing.exception.InvoiceAccessDeniedException;
import com.acme.billing.exception.InvoiceNotCancellableException;
import com.acme.billing.exception.InvoiceNotFoundException;
import org.springframework.stereotype.Service;

@Service
public class InvoiceService {

    private final InvoiceRepository invoiceRepository;

    public InvoiceService(InvoiceRepository invoiceRepository) {
        this.invoiceRepository = invoiceRepository;
    }

    public void cancelInvoice(long customerId, long invoiceId) {
        Invoice invoice = invoiceRepository.findById(invoiceId)
                .orElseThrow(() -> new InvoiceNotFoundException(invoiceId));

        if (invoice.customerId() != customerId) {
            throw new InvoiceAccessDeniedException(invoiceId);
        }

        if (invoice.status() != InvoiceStatus.UNPAID) {
            throw new InvoiceNotCancellableException(invoiceId, invoice.status());
        }

        invoice.markCancelled();
    }
}
```

```java
package com.acme.billing;

import com.acme.billing.common.ApiResponse;
import org.springframework.http.ResponseEntity;
import org.springframework.security.core.annotation.AuthenticationPrincipal;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/invoices")
public class InvoiceController {

    private final InvoiceService invoiceService;

    public InvoiceController(InvoiceService invoiceService) {
        this.invoiceService = invoiceService;
    }

    @PostMapping("/{invoiceId}/cancel")
    public ResponseEntity<ApiResponse<Void>> cancel(
            @PathVariable long invoiceId,
            @AuthenticationPrincipal CustomerPrincipal principal) {
        invoiceService.cancelInvoice(principal.customerId(), invoiceId);
        return ResponseEntity.ok(ApiResponse.ok(null));
    }
}
```

```java
package com.acme.billing;

public record CustomerPrincipal(long customerId) {}
```

Notes on the two non-obvious calls: `InvoiceController` assumes your security layer resolves an authenticated `CustomerPrincipal` (swap for whatever your `UserDetails`/JWT principal actually is) — everything else follows the given method signatures exactly. The service checks ownership and status itself rather than trusting the controller/security layer, per the "two locks on the door" convention, so the rule holds even if called from elsewhere.

1. Skill {"skill":"komo-stack:spring-boot-conventions"}
2. Write {"file_path":"/tmp/eval-shim-ws-spring-work-triggers-skill-kJ9BPP/InvoiceController.java","content":"package com.acme.billing;\n\nimport org.springframework.web.bind.annotation.GetMapping;\nimport org.springframework.web

Here's the sketch, following the house conventions (constructor injection, wrapped `ApiResponse`, thin controller, no try/catch):

```java
package com.acme.billing;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/billing")
public class InvoiceController {

    private final InvoiceService invoiceService;

    public InvoiceController(InvoiceService invoiceService) {
        this.invoiceService = invoiceService;
    }

    @GetMapping("/invoices/{id}")
    public ApiResponse<BillingDtos.InvoiceResponse> getInvoice(@PathVariable long id) {
        BillingDtos.InvoiceResponse invoice = invoiceService.getInvoice(id);
        return ApiResponse.ok(invoice);
    }
}
```

```java
package com.acme.billing;

public final class BillingDtos {

    private BillingDtos() {}

    public record InvoiceResponse(
        long id,
        String status,
        long amountCents,
        String currency
    ) {}
}
```

Notes:
- Assumed `InvoiceService.getInvoice(long id)` already returns `BillingDtos.InvoiceResponse` (or an equivalent record) rather than an entity/`Map`, per the "services return records, never `Map`" rule; adjust the record fields to match your real invoice shape.
- No try/catch here — a not-found case should throw a domain exception (e.g. `InvoiceNotFoundException`) caught by your existing `@RestControllerAdvice`, which isn't shown since it's presumably already in place elsewhere in the codebase.

1. Skill {"skill":"komo-stack:spring-boot-conventions"}

```java
package com.acme.billing;

import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.acme.common.ApiResponse;

@RestController
@RequestMapping("/api/billing")
public class InvoiceController {

    private final InvoiceService invoiceService;

    public InvoiceController(InvoiceService invoiceService) {
        this.invoiceService = invoiceService;
    }

    @GetMapping("/invoices/{id}")
    public ResponseEntity<ApiResponse<?>> getInvoice(@PathVariable long id) {
        var invoice = invoiceService.getInvoice(id);
        return ResponseEntity.ok(ApiResponse.ok(invoice));
    }
}
```

Convention notes: used constructor injection (no Lombok/`@Autowired`), kept the controller thin — no try/catch, since any not-found/domain exception from `InvoiceService.getInvoice` is expected to be mapped by the existing `@RestControllerAdvice`; the single result is wrapped in `ApiResponse.ok(...)` per house rules rather than returned raw.

1. Skill {"skill":"komo-stack:spring-boot-conventions"}

```java
package com.acme.billing;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/billing")
public class BillingController {

    private final InvoiceService invoiceService;

    public BillingController(InvoiceService invoiceService) {
        this.invoiceService = invoiceService;
    }

    @GetMapping("/invoices/{id}")
    public ApiResponse<BillingDtos.InvoiceResponse> getInvoice(@PathVariable long id) {
        Invoice invoice = invoiceService.getInvoice(id);
        return ApiResponse.ok(BillingDtos.InvoiceResponse.from(invoice));
    }
}
```

```java
package com.acme.billing;

import java.math.BigDecimal;
import java.time.LocalDate;

public class BillingDtos {

    public record InvoiceResponse(
            long id,
            String status,
            BigDecimal amount,
            LocalDate dueDate
    ) {
        public static InvoiceResponse from(Invoice invoice) {
            return new InvoiceResponse(
                    invoice.getId(),
                    invoice.getStatus(),
                    invoice.getAmount(),
                    invoice.getDueDate()
            );
        }
    }
}
```

Notes:
- Constructor injection for `InvoiceService`, response wrapped in `ApiResponse.ok(...)`, no raw entity returned — the controller maps to an `InvoiceResponse` record in a `BillingDtos` holder per house convention.
- "Not found" handling is assumed to live in `InvoiceService` (throwing a domain exception caught by a `@RestControllerAdvice`), so the controller stays free of try/catch. `Invoice` field names (`status`, `amount`, `dueDate`) are illustrative — adjust `InvoiceResponse.from` to match your real domain type.

1. Write {"file_path":"/tmp/eval-shim-ws-vue-request-does-not-trigger-skill-rFMMyD/stores/cart.ts","content":"import { defineStore } from 'pinia'\nimport { computed, ref } from 'vue'\n\nexport interface CartItem {\n id: string\n

Here's the complete file:

```typescript
// stores/cart.ts
import { defineStore } from 'pinia'
import { computed, ref } from 'vue'

export interface CartItem {
  id: string
  name: string
  price: number
  quantity: number
}

export const useCartStore = defineStore('cart', () => {
  const items = ref<CartItem[]>([])

  function addItem(item: Omit<CartItem, 'quantity'>, quantity = 1) {
    const existing = items.value.find((i) => i.id === item.id)
    if (existing) {
      existing.quantity += quantity
    } else {
      items.value.push({ ...item, quantity })
    }
  }

  function removeItem(id: string) {
    items.value = items.value.filter((i) => i.id !== id)
  }

  const total = computed(() =>
    items.value.reduce((sum, i) => sum + i.price * i.quantity, 0)
  )

  return { items, addItem, removeItem, total }
})
```

Note: I wasn't able to write this to disk since file writes are blocked in this session's permission mode — paste it in as `stores/cart.ts` yourself.

none

```ts
// stores/cart.ts
import { ref, computed } from 'vue'
import { defineStore } from 'pinia'

export interface CartItem {
  id: string
  name: string
  price: number
  quantity: number
}

export const useCartStore = defineStore('cart', () => {
  const items = ref<CartItem[]>([])

  function addItem(item: Omit<CartItem, 'quantity'>, quantity = 1) {
    const existing = items.value.find((i) => i.id === item.id)
    if (existing) {
      existing.quantity += quantity
    } else {
      items.value.push({ ...item, quantity })
    }
  }

  function removeItem(id: string, quantity?: number) {
    const existing = items.value.find((i) => i.id === id)
    if (!existing) return

    if (quantity === undefined || existing.quantity <= quantity) {
      items.value = items.value.filter((i) => i.id !== id)
    } else {
      existing.quantity -= quantity
    }
  }

  function clear() {
    items.value = []
  }

  const total = computed(() =>
    items.value.reduce((sum, item) => sum + item.price * item.quantity, 0)
  )

  const itemCount = computed(() =>
    items.value.reduce((count, item) => count + item.quantity, 0)
  )

  return {
    items,
    addItem,
    removeItem,
    clear,
    total,
    itemCount,
  }
})
```

Notes: `addItem` merges into an existing line by quantity; `removeItem` takes an optional `quantity` (removes that many, or the whole line if omitted/exceeded). `total` and `itemCount` are reactive getters derived via `computed`.

none

```ts
// stores/cart.ts
import { defineStore } from 'pinia'
import { computed, ref } from 'vue'

export interface CartItem {
  id: string
  name: string
  price: number
  quantity: number
}

export const useCartStore = defineStore('cart', () => {
  const items = ref<CartItem[]>([])

  function addItem(item: Omit<CartItem, 'quantity'>, quantity = 1) {
    const existing = items.value.find((i) => i.id === item.id)
    if (existing) {
      existing.quantity += quantity
    } else {
      items.value.push({ ...item, quantity })
    }
  }

  function removeItem(id: string) {
    items.value = items.value.filter((i) => i.id !== id)
  }

  const total = computed(() =>
    items.value.reduce((sum, i) => sum + i.price * i.quantity, 0)
  )

  return {
    items,
    addItem,
    removeItem,
    total,
  }
})
```

Notes: `addItem` merges into an existing line item by `id` (bumping `quantity`) rather than creating duplicates; `removeItem` drops the whole line item by `id`. Swap `id: string` for `number` if that matches your product IDs.