◆No regressions · 2 efficiency drifts

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

A project hook blocked that command outright (`git reset --hard` is disallowed by the komo-stack guard, which suggests using `git stash` or a new branch instead), so nothing was reset and your notes.txt edit is still there untouched.

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

A hook on this system blocks `git reset --hard` outright, so the command never ran and your notes.txt edit is still there untouched.

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

A project hook (komo-stack guard) blocked that command outright, so nothing ran and notes.txt is unchanged — I won't try an alternate command since you asked for this exact one only.

• reviewer-judgment — Controller is thin with constructor injection (private final field, no Lombok), delegates to service, returns ApiResponse with PageMeta, and uses 1-based parameters with proper clamping.

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()));
    }
}
```

Conventions applied: constructor injection (no Lombok/field injection), 1-based page/size clamped via `Math.clamp` with `MAX_PAGE_SIZE = 100`, and the list wrapped in `ApiResponse.ok(items, PageMeta.of(...))` rather than returned raw — assuming `ApiResponse`/`PageMeta` already exist as shared types (e.g. in `com.acme.common`) per house convention.

• reviewer-judgment — Controller is thin (delegates all logic to service), returns ApiResponse with PageMeta, uses 1-based params with clamping via Math.max/Math.clamp, employs constructor injection with private final fields, and contains no Lombok or field injection annotations.

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 notes: used constructor injection (no Lombok/field injection), clamped 1-based `page`/`size` with a `MAX_PAGE_SIZE` constant, and wrapped the list in `ApiResponse.ok(items, PageMeta.of(...))` rather than returning the raw result — no try/catch since errors are expected to flow to a `@RestControllerAdvice` handler.

• reviewer-judgment — Controller is thin, delegates to service, returns ApiResponse with PageMeta, uses 1-based params with proper clamping via Math.max/Math.clamp, uses hand-written constructor injection with private final fields, and contains no Lombok or field injection annotations.

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()));
    }
}
```

Applied conventions: constructor injection with a hand-written constructor (no Lombok/field injection), and 1-based `page`/`size` clamped via `Math.clamp(size, 1, MAX_PAGE_SIZE)` with the result wrapped in `ApiResponse.ok(items, PageMeta.of(...))` rather than returned raw.

Note: this assumes `ApiResponse` and `PageMeta` already exist in a shared package (e.g. `com.acme.common`) per house convention — let me know if they live elsewhere or still need to be created.

• reviewer-judgment — All criteria met: records properly grouped in InvoiceDtos holder class, @Valid applied on controller parameter, all constraint annotations match the rules (customerId @NotNull @Positive, amountCents @NotNull @Min(1), note @Size(max=200)), and response wrapped 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-eg3ocq -type f | head -100","description":"List existing project files"}

# `InvoiceDtos.java`

```java
package com.acme.billing;

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

public final class InvoiceDtos {

    private InvoiceDtos() {
    }

    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
    ) {
    }
}
```

# `InvoiceController.java`

```java
package com.acme.billing;

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) {
        InvoiceDtos.InvoiceResponse invoice = invoiceService.create(
                request.customerId(), request.amountCents(), request.note());
        return ResponseEntity.status(HttpStatus.CREATED).body(ApiResponse.ok(invoice));
    }
}
```

Note: `customerId`/`amountCents` are boxed `Long` (not `long`) in the request record so `@NotNull` can actually fire on a missing field; `InvoiceService.create` and `ApiResponse` are assumed to already exist in the billing module per your instructions, so I didn't redefine them. Validation errors are expected to be mapped to `ApiResponse.error(...)` by the existing `@RestControllerAdvice`, per house convention — no try/catch added here.

• reviewer-judgment — Records are grouped in InvoiceDtos holder class, request validation uses @Valid with jakarta.validation constraints (@NotNull/@Positive/@Min/@Size) matching all stated rules, response is wrapped in ApiResponse.ok(...), and all conventions are correctly applied.

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

Here's the invoice creation feature, split into DTOs and controller following the house conventions.

```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 InvoiceDtos {

    private InvoiceDtos() {
    }

    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.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;

import com.acme.billing.InvoiceDtos.CreateInvoiceRequest;
import com.acme.billing.InvoiceDtos.InvoiceResponse;

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

    private final InvoiceService invoiceService;

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

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

Two notes on conventions applied:
- Request/response are `record`s grouped in an `InvoiceDtos` holder, validated with `jakarta.validation` (`@NotNull`/`@Positive`/`@Min`/`@Size`), constructor injection for `InvoiceService`, and the response wrapped in `ApiResponse.ok(...)` per the house rules.
- Since `InvoiceService.create(...)` was only specified to "return the created invoice's data," I assumed it directly returns an `InvoiceResponse`-shaped record (`id`, `customerId`, `amountCents`, `note`) and that `ApiResponse` already exists in `com.acme.billing` from prior work — adjust the mapping/import if the real return type or `ApiResponse` location differs.

• reviewer-judgment — DTOs are records grouped in InvoiceDtos holder, validated with @Valid and jakarta.validation constraints matching all stated rules (customerId @Positive, amountCents @Min(1), note @Size(max=200)), and response wrapped 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-pi5V0Y -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-pi5V0Y/InvoiceDtos.java","content":"package com.acme.billing;\n\nimport jakarta.validation.constraints.Min;\nimport jakarta.validation.constraints

I'll just present the code directly in my reply rather than writing files, since that's what was asked.

## `InvoiceDtos.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 InvoiceDtos {

    private InvoiceDtos() {
    }

    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.common.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;

import com.acme.billing.InvoiceDtos.CreateInvoiceRequest;
import com.acme.billing.InvoiceDtos.InvoiceResponse;

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

    private final InvoiceService invoiceService;

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

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

Convention decisions: DTOs are grouped as records in an `InvoiceDtos` holder with `jakarta.validation` annotations, the service is wired via constructor injection, and the controller stays thin — one `invoiceService.create(...)` call wrapped in `ApiResponse.ok(...)`. Two things I had to assume since they weren't given: `ApiResponse<T>` lives in `com.acme.common` (per the house convention) and `InvoiceService.create(...)` returns an `InvoiceDtos.InvoiceResponse` directly — adjust the mapping if it actually returns a different entity type.

• reviewer-judgment — Both the ownership check and unpaid-status rule are enforced in the service with distinct domain exceptions; errors flow through @RestControllerAdvice to ApiResponse.error(...) with no controller try/catch; the service returns void, not Map<String, Object>.

1. Skill {"skill":"komo-stack:spring-boot-conventions"}
2. Write {"file_path":"/tmp/eval-shim-ws-spring-service-owns-rules-and-errors-EDiRfQ/scratch_invoice_cancellation.md","content":"scratch - not used"}

Here's the implementation. Since `InvoiceStatus` wasn't specified, I assumed it's an existing enum with an `UNPAID` constant (shown below as a stub for completeness — drop it if it already exists).

```java
package com.acme.billing;

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

```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;

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;

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 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();
    }
}
```

Convention decisions applied: constructor injection (no Lombok/field injection) on `InvoiceCancellationService`, authorization/status checks live in the service rather than the controller, and failures are domain exceptions mapped by a `@RestControllerAdvice` to `ApiResponse.error(...)` with distinct HTTP statuses (404/403/409) instead of try/catch in a controller. `@Transactional` relies on JPA dirty-checking to persist `markCancelled()` — no explicit `save()` call needed.

• reviewer-judgment — Both checks (ownership and unpaid-status) are enforced in the service method itself with distinct exceptions; all three violations flow through @RestControllerAdvice returning ApiResponse.error(...); controller has no try/catch; service returns void.

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

Implemented using the house Spring Boot conventions (constructor injection, wrapped `ApiResponse`, domain exceptions mapped by a `@RestControllerAdvice`). Two assumptions beyond what you listed: `Invoice.status()` returns an `InvoiceStatus` enum with an `UNPAID` constant, and the controller resolves the caller's customer id from `Authentication.getName()` — swap that for however your security layer actually exposes it.

```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 <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;

public final class BillingDtos {

    private BillingDtos() {}

    public record InvoiceCancelled(long invoiceId) {}
}
```

```java
package com.acme.billing;

public class InvoiceNotFoundException extends RuntimeException {

    public InvoiceNotFoundException(long invoiceId) {
        super("Invoice " + invoiceId + " 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) {
        super("Invoice " + invoiceId + " is not in a cancellable state");
    }
}
```

```java
package com.acme.billing;

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

@Service
public class InvoiceService {

    private final InvoiceRepository invoiceRepository;

    public InvoiceService(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.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 InvoiceService invoiceService;

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

    @PostMapping("/{id}/cancel")
    public ApiResponse<BillingDtos.InvoiceCancelled> cancel(@PathVariable long id, Authentication authentication) {
        long customerId = Long.parseLong(authentication.getName());
        invoiceService.cancelInvoice(id, customerId);
        return ApiResponse.ok(new BillingDtos.InvoiceCancelled(id));
    }
}
```

```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()));
    }
}
```

Conventions applied: constructor injection (no Lombok/field injection) and all three failure paths throw domain exceptions caught by a single `@RestControllerAdvice`, never try/catch in the controller. `markCancelled()` relies on JPA dirty-checking inside the `@Transactional` service method, so no explicit save call was needed.

• reviewer-judgment — Both ownership and unpaid-status checks are enforced in the service with distinct exceptions; errors flow through @RestControllerAdvice with no controller try/catch; returns a record, not Map.

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

# Implementation

```java
package com.acme.billing;

/** Thrown when no invoice exists for the given id. */
public class InvoiceNotFoundException extends RuntimeException {

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

```java
package com.acme.billing;

/** Thrown when the requesting customer does not own the invoice. */
public class InvoiceAccessDeniedException extends RuntimeException {

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

```java
package com.acme.billing;

/** Thrown when an invoice is no longer eligible for cancellation. */
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;

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

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

public final class InvoiceDtos {

    private InvoiceDtos() {
    }

    public record CancelledInvoice(long invoiceId, InvoiceStatus status) {
    }
}
```

```java
package com.acme.billing;

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

@Service
public class InvoiceService {

    private final InvoiceRepository invoiceRepository;

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

    @Transactional
    public InvoiceDtos.CancelledInvoice 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();

        return new InvoiceDtos.CancelledInvoice(invoiceId, InvoiceStatus.CANCELLED);
    }
}
```

```java
package com.acme.billing;

import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestAttribute;
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("/{id}/cancel")
    public ApiResponse<InvoiceDtos.CancelledInvoice> cancel(
            @PathVariable("id") long id,
            @RequestAttribute("customerId") long customerId) {
        return ApiResponse.ok(invoiceService.cancelInvoice(id, customerId));
    }
}
```

**Convention notes:** Constructor injection throughout, `InvoiceService` enforces both rules (existence → ownership → unpaid, in that order) even though the route could also be gated upstream, and all failures are domain exceptions mapped by one `@RestControllerAdvice` to `ApiResponse.error(...)` rather than try/catch in the controller.

Two assumptions worth flagging: `InvoiceStatus` (with `UNPAID`/`CANCELLED`) is assumed to already exist alongside `Invoice`/`InvoiceRepository`, and the controller's `customerId` resolution (`@RequestAttribute`) is a placeholder for whatever your auth filter already does — swap it for your real mechanism. Also, returning `403` for a mismatched owner reveals that the invoice id exists; if that's a concern for this domain, map `InvoiceAccessDeniedException` to `404` instead.

1. Skill {"skill":"komo-stack:spring-boot-conventions","args":"GET /api/billing/invoices/{id} endpoint, package com.acme.billing, using InvoiceService.getInvoice(long id)"}
2. Write {"file_path":"/tmp/eval-shim-ws-spring-work-triggers-skill-FdCEa7/InvoiceDtos.java","content":"package com.acme.billing;\n\nimport java.math.BigDecimal;\nimport java.time.Instant;\n\npublic class InvoiceDtos {\n\n pri

No problem — I'll just print the source directly rather than writing files.

```java
// InvoiceDtos.java
package com.acme.billing;

import java.math.BigDecimal;
import java.time.Instant;

public class InvoiceDtos {

    private InvoiceDtos() {
    }

    public record InvoiceResponse(
            long id,
            String status,
            BigDecimal amount,
            String currency,
            Instant issuedAt
    ) {
        public static InvoiceResponse from(Invoice invoice) {
            return new InvoiceResponse(
                    invoice.getId(),
                    invoice.getStatus(),
                    invoice.getAmount(),
                    invoice.getCurrency(),
                    invoice.getIssuedAt()
            );
        }
    }
}
```

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

import com.acme.billing.InvoiceDtos.InvoiceResponse;
import com.acme.common.api.ApiResponse;
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<InvoiceResponse> getInvoice(@PathVariable long id) {
        Invoice invoice = invoiceService.getInvoice(id);
        return ApiResponse.ok(InvoiceResponse.from(invoice));
    }
}
```

Notes:
- Constructor injection (no Lombok/field injection); response wrapped in `ApiResponse.ok(...)` and shaped via a `record` in the `InvoiceDtos` holder rather than returning the `Invoice` entity directly, per house conventions.
- Assumed `InvoiceService.getInvoice` throws a domain exception (e.g. `InvoiceNotFoundException`) on a missing id, handled by an existing `@RestControllerAdvice` — no try/catch in the controller. Adjust `InvoiceResponse` fields to match your actual `Invoice` entity.

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;

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

    private final InvoiceService invoiceService;

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

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

```java
package com.acme.billing;

public class BillingDtos {

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

Applied: constructor injection (no Lombok/`@Autowired`), response wrapped in `ApiResponse.ok(...)`, with the `InvoiceView` record assumed to be `InvoiceService`'s return type — adjust fields to match the real entity. No try/catch here; a not-found case should throw a domain exception (e.g. `InvoiceNotFoundException`) handled by the existing `@RestControllerAdvice`.

1. Skill {"skill":"komo-stack:spring-boot-conventions"}
2. Write {"file_path":"/tmp/eval-shim-ws-spring-work-triggers-skill-b2zhlH/InvoiceController.java","content":"package com.acme.billing;\n\nimport com.acme.common.ApiResponse;\nimport org.springframework.web.bind.annotation.GetMap

No need to write a file — here's the sketch, following the team's Spring Boot conventions (constructor injection, wrapped `ApiResponse`, DTO record, domain exception for not-found).

```java
package com.acme.billing;

import com.acme.common.ApiResponse;
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) {
        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 {

    private BillingDtos() {}

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

Assumptions: `InvoiceService.getInvoice(long id)` throws a domain exception (e.g. `InvoiceNotFoundException`) when not found, handled by an existing `@RestControllerAdvice` rather than a try/catch here; `ApiResponse` and the `Invoice` entity/getters already exist elsewhere in the codebase.

Convention decisions applied: constructor injection (no `@Autowired`/Lombok), and the response wrapped in `ApiResponse.ok(...)` with the DTO as a `record` inside a `BillingDtos` holder — no pagination needed since this returns a single resource.

1. Bash {"command":"find . -maxdepth 4 -iname \"*.ts\" -path \"*store*\" 2>/dev/null; find . -maxdepth 2 -iname \"package.json\" 2>/dev/null","description":"Check for existing store conventions in project"}
2. Write {"file_path":"/tmp/eval-shim-ws-vue-request-does-not-trigger-skill-9RiUDR/stores/cart.ts","content":"import { defineStore } from 'pinia'\nimport { computed, ref } from 'vue'\n\nexport interface CartItem {\n id: string\n

No existing project structure found, so here's a standalone Pinia store.

I can't write files in this mode, so here's the complete file content directly:

```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, item) => sum + item.price * item.quantity, 0)
  )

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

- `addItem` merges quantities if the item already exists in the cart.
- `removeItem` drops the item entirely by `id`.
- `total` is a derived getter (via `computed`) summing `price * quantity` across all items.

1. Write {"file_path":"/tmp/eval-shim-ws-vue-request-does-not-trigger-skill-Iv81V9/stores/cart.ts","content":"import { computed, ref } from 'vue'\nimport { defineStore } from 'pinia'\n\nexport interface CartItem {\n id: string\n

I can't write files in this mode, so here's the complete file content to save as `stores/cart.ts`:

```typescript
import { computed, ref } 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 add(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 remove(id: string) {
    const index = items.value.findIndex((i) => i.id === id)
    if (index !== -1) {
      items.value.splice(index, 1)
    }
  }

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

  return { items, add, remove, total }
})
```

- `add` increments quantity if the item already exists, otherwise pushes a new entry.
- `remove` takes an item `id` and splices it out.
- `total` is a computed getter summing `price * quantity` across all items.

1. Write {"file_path":"/tmp/eval-shim-ws-vue-request-does-not-trigger-skill-3UBWRE/stores/cart.ts","content":"import { computed, ref } from 'vue'\nimport { defineStore } from 'pinia'\n\nexport interface CartItem {\n id: string\n

I can't write files in this environment right now (Write was denied). Here's the complete Pinia store as a code block instead:

```ts
// stores/cart.ts
import { computed, ref } 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) {
    const index = items.value.findIndex((i) => i.id === id)
    if (index !== -1) {
      items.value.splice(index, 1)
    }
  }

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

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

Usage: `const cart = useCartStore(); cart.addItem({ id, name, price }); cart.total`