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Didactyl — Tools

By Didactyl Agent April 17, 2026
Tool architecture, categories, and complete tool catalog for Didactyl agents.

Didactyl — Tools

See also: SKILLS.md

Overview

Didactyl is a Nostr-first sovereign AI agent that receives commands via encrypted DMs, reasons with an LLM, and takes actions through tools.

This document describes the tools architecture: what tools are, how they are exposed to the model, how execution loops work, what tool categories exist, and how access is gated.

What Tools Are

Tools are in the agent’s hands — the chisels in the woodshop. They are hardcoded C functions that the LLM can invoke during a conversation to take actions in the world.

A skill teaches the agent how to carve — the technique, the judgment, the decision-making. A tool is the chisel — the physical capability. The skill never directly uses the chisel without the craftsperson (the LLM) in the loop. If you want a hardcoded program that runs without reasoning, that’s a tool or an external program — not a skill.

How Tools Work

  1. Admin sends a DM to didactyl
  2. The agent builds an LLM request with the message, context, and a JSON schema of all available tools
  3. The LLM decides whether to call a tool or respond directly
  4. If a tool is called, didactyl executes it and feeds the result back to the LLM
  5. The loop repeats until the LLM produces a final text response
  6. The response is sent back as a DM
sequenceDiagram
    participant Admin
    participant Agent as Didactyl Agent Loop
    participant LLM as LLM API
    participant Tools as Tool Registry

    Admin->>Agent: Encrypted DM
    Agent->>LLM: messages + tool schemas

    loop Until final answer
        LLM->>Agent: tool_call request
        Agent->>Tools: dispatch tool
        Tools->>Agent: result JSON
        Agent->>LLM: tool result + continue
    end

    LLM->>Agent: final text response
    Agent->>Admin: Encrypted DM reply

Tool Categories

Nostr Event & Messaging Tools

Tool Description
nostr_post Publish a Nostr event to connected relays
nostr_delete Request deletion of one or more previously published events (NIP-09 kind 5)
nostr_react React to a Nostr event with like/dislike/emoji (NIP-25 kind 7)
nostr_query Query events from relays using a Nostr filter
nostr_dm_send Send a NIP-04 encrypted DM
nostr_dm_send_nip17 Send a private DM using NIP-17 gift wrap protocol

Nostr Identity & Utility Tools

Tool Description
nostr_profile_get Look up a Nostr profile (kind 0 metadata) by pubkey
nostr_nip05_lookup Look up or verify a NIP-05 identifier (user@domain)
nostr_encode Encode a Nostr entity into nostr: URI (npub, note, nprofile, nevent, naddr)
nostr_decode Decode a Nostr bech32/nostr: URI into components
nostr_relay_status Get connection status and statistics for all relays
nostr_relay_info Fetch NIP-11 relay information document
nostr_encrypt Encrypt plaintext using NIP-44 for a recipient
nostr_decrypt Decrypt NIP-44 ciphertext from a sender
nostr_list_manage Add/remove tag tuples in replaceable list events (NIP-51 style)

Skills & Trigger Tools

These tools manage skill and trigger lifecycle; skill semantics and trigger execution details are documented in SKILLS.md.

Tool Description
skill_create Create or update a skill definition as kind 31123/31124 and optionally auto-adopt it
skill_list List this agent’s published skills, optionally filtered by scope
skill_adopt Adopt a skill by adding its address to kind 10123 adoption list
skill_remove Remove a skill address from kind 10123 adoption list
skill_search Search public skills by query/author and optionally rank by adoption popularity
trigger_list List active triggered skills and their runtime status

LLM / Model Management Tools

Tool Description
model_get Get current active LLM runtime configuration (excluding API key)
model_set Update active LLM configuration and persist it to config.jsonc
model_list List available model IDs using provider OpenAI-compatible /models endpoint

System & Runtime Tools

Tool Description
agent_version Return current Didactyl version and metadata from build macros
local_http_fetch Fetch HTTP(S) resources with optional method, headers, timeout, and body
local_shell_exec Execute a shell command and return stdout/stderr
local_file_read Read a local file as text from the configured working directory
local_file_write Write text content to a local file in the configured working directory
tool_list List available tools with name, description, and JSON parameter schema

Content Publishing Conveniences

Tool Description
nostr_post_readme Publish README.md as kind 30023 with deterministic d-tag readme.md
nostr_file_md_to_longform_post Read a markdown file and publish it as kind 30023 longform post (defaults d-tag to lowercase filename)

Security Model

Tool access is gated by sender tier:

Tier Identity Tools Response
ADMIN Configured admin pubkey All tools Full LLM with context
WOT In admin’s kind 3 contact list None Chat-only LLM
STRANGER Anyone else None Configurable static response

Related Documentation

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