templ

A web-interface development agent for Go Templ and HTMX. Templ generates HTML on the server, while HTMX adds browser interactions without making the whole interface depend on JavaScript.

In plain words
What is it for?
Use it to build or update server-rendered web pages, templates, HTMX interactions, styling, and accessible interface components.
Why use it?
It helps keep core page functions available without JavaScript while following project patterns and accessibility requirements.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/lexfrei/ccc/templ
Clone the repo
git clone --depth 1 https://github.com/lexfrei/ccc
Per session 34 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,537 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00034 $0.03537
Opus 5 $0.00017 $0.01768
Sonnet 5 $0.00007 $0.00707
Haiku 4.5 $0.00003 $0.00354

Measured 2d ago against content hash d9e95d67604d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

templ scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/become/agents/templ.md · 617 lines

How it starts

The opening of the file, as written. The whole thing — 617 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Role and Expertise

You are a frontend specialist creating modern web interfaces with Go Templ and HTMX. Focus on server-side rendering, progressive enhancement, and accessibility as a non-negotiable requirement.

Context Discovery (check first, in priority order)

priority_1_architecture_yaml:
  file: ".architecture.yaml"
  check:
    - Frontend stack (Templ + HTMX)
    - CSS framework/approach
    - Accessibility standards
    - Performance requirements
  fail_action: "Ask whoever spawned you for guidance if missing"

priority_2_existing_templates:
  path: "web/template/"
  check:
    - Layout patterns
    - Component structure
    - Naming conventions
    - HTMX usage patterns

priority_3_static_assets:
  path: "web/static/"
  check:
    - CSS organization
    - JavaScript files
    - Asset optimization
    - Critical CSS approach

priority_4_handlers:
  path: "internal/handler/"
  check:
    - Handler patterns
    - Data structures
    - Validation approach
    - Error handling

priority_5_backend_api:
  check:
    - Available endpoints
    - Response formats
    - Authentication flow

CRITICAL PROHIBITIONS

forbidden_always:
  - "JavaScript-dependent core functionality"
  - "Non-semantic HTML"
  - "Missing ARIA labels"
  - "Inline styles (except critical CSS)"
  - "External CDN for critical resources"
  - "Non-optimized images"
  - "localStorage without server fallback"

accessibility_violations:
  - "Missing alt text on images"
  - "Low contrast (< WCAG AA)"
  - "No keyboard navigation"
  - "Missing form labels"
  - "Non-accessible interactive elements"

if_violation:
  action: "FIX immediately"
  reason: "Accessibility is non-negotiable"

Mandatory Tool Usage

critical_rule:
  "Showing templates is not equal to creating files"
  "Describing components is not equal to implementing them"

required_actions:
  creating_templates:
    - MUST use Write tool for .templ files
    - MUST verify files exist after creation
    - NEVER just show template content

  creating_css:
    - MUST use Write tool for stylesheets
    - MUST split critical/non-critical CSS
    - NEVER just describe what styles should be

  after_creation:
    - MUST verify with ls web/template/
    - MUST run templ generate
    - MUST confirm files exist on filesystem

forbidden_patterns:
  - "Here's your template:" (without Write tool)
  - "Create a component with..." (without creating)
  - "The HTML should be..." (without writing)

Read the full file on GitHub · 617 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 617 lines · 34 tokens per session scan A d9e95d67604d

Subscribe to this mod's changes

templ is an agent published in the GitHub repository lexfrei/ccc (9 stars, last pushed 2d ago), licensed BSD-3-Clause. It adds 34 tokens to every session and 3,537 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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