Calcpad Web Backend Developer

What it does

When your agent uses it

• Working on API endpoints
• CalcpadController
• Request/response models
• Server deployment

Example prompts

• “/calcpad-web-backend-developer”

Requirements

• Docker
• Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

1. 1Add to CalcpadController
2. 2Add request/response models inline at the bottom of CalcpadController.cs, following the existing ones — Models/ holds only the PDF request…
3. 3Implement service logic in Services/, and register it in CalcpadApiService.ConfigureBuilder if it needs DI
4. 4Add corresponding frontend API method in calcpad-frontend/src/api/client.ts
5. 5Document it in Calcpad.Web/backend/API_SCHEMA.md — that file is the canonical schema and the frontend types are written against it

What it can do on your machine

Read from SKILL.md and the folder at commit 0b20dba. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Write
  • Edit
  • Glob
  • Grep
  • Bash

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are csharp).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Calcpad Web Backend Developer loads about 1.4k tokens when it runs. Until then it costs about 60 tokens; SKILL.md has 487 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~60

When it runs · the whole SKILL.md, loaded when a task matches

~1.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

• NotePre-approves every shell command (allowed-tools: Bash)SKILL.md

  allowed-tools: Read, Write, Edit, Glob, Grep, Bash

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from imartincei/CalcpadCE at commit 0b20dba, republished under its MIT licence (© imartincei). 487 words, ~1,424 tokens.

name

calcpad-web-backend-developer

description

Expert developer for Calcpad.Web/backend - the ASP.NET Core 10 Web API server. Use when working on API endpoints, CalcpadController, PDF generation, CalcpadService, request/response models, or server deployment.

allowed-tools

Read, Write, Edit, Glob, Grep, Bash

Calcpad.Web/backend  <- YOU ARE HERE
├── Calcpad.Core (Math engine - MathParser, Plotter)
└── Calcpad.Highlighter (Linting, tokenization, content resolution)

[HttpPost("new-endpoint")]
public IActionResult NewEndpoint([FromBody] NewRequest request, CancellationToken cancellationToken)
{
    try
    {
        if (string.IsNullOrWhiteSpace(request.Content))
            return BadRequest("Content is required");

        cancellationToken.ThrowIfCancellationRequested();

        var staged = _contentResolutionCache.GetOrResolve(request.Content, request.SourceFilePath);
        return Ok(new NewResponse { /* ... */ });
    }
    catch (OperationCanceledException)
    {
        return StatusCode(499);   // superseded by a newer request, not an error
    }
    catch (Exception ex)
    {
        FileLogger.LogError("New endpoint failed", ex);
        return StatusCode(500, $"Error: {ex.Message}");
    }
}

© imartincei, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files in .claude/skills/calcpad-web-backend-developer of imartincei/CalcpadCE.

• SKILL.md
• reference/models-and-services.md
• reference/structure-config-deploy.md

Open the folder on GitHubat commit 0b20dba