evolve

A buddy evolution tool that checks a companion’s level and previous choices, then presents the next available evolution paths. It supports two choices at level 5 and two further choices at level 10.

In plain words
What is it for?
Use it to check evolution eligibility, choose an evolution path, view species-specific options, or confirm that evolution is complete.
Why use it?
It removes the need to remember when a buddy can evolve or which species-specific paths are available. It also tells you when the buddy is not yet eligible or has reached its final form.

Skill for Claude CodeCodex

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 skills/frankfmy/buddy-evolution/evolve
Any agent
npx skills add FrankFMY/buddy-evolution --skill evolve
Clone the repo
git clone --depth 1 https://github.com/FrankFMY/buddy-evolution

Made for: Claude Code, Codex.

Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 863 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 $0.00033 $0.00863
Opus 5 $0.00016 $0.00432
Sonnet 5 $0.00007 $0.00173
Haiku 4.5 $0.00003 $0.00086

Measured 2d ago against content hash 950bb682f1cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

evolve 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/evolve/SKILL.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Buddy Evolution

Help the user choose an evolution path for their companion.

Instructions

  1. Read ~/.buddy-evolution/soul.json

  2. Check eligibility:

    • Level 5+ with empty evolutionPath: Offer first evolution choice (Path A vs Path B)
    • Level 10+ with 1 entry in evolutionPath: Offer second evolution choice (sub-path 1 vs 2)
    • Already has 2 entries: Tell the user their buddy has reached final form
    • Below Level 5: Tell the user they need Level 5 to evolve (show current level and XP needed)
  3. Present species-specific choices. Read the species from identity.species and look up paths below.

Evolution Paths by Species

Species Path A Path B A1 A2 B1 B2
duck Scholar Prankster Sage Librarian Jester Trickster
goose Guardian Chaos Agent Sentinel Warden Maverick Anarchist
blob Shapeshifter Absorber Mimic Phantom Titan Void
snail Hermit Explorer Sage Monk Pioneer Nomad
cat Shadow Familiar Phantom Assassin Oracle Enchanter
rabbit Scout Burrower Ranger Speedster Architect Keeper
owl Sage Hunter Oracle Archivist Stalker Raptor
penguin Emperor Diver Commander Diplomat Depths Walker Ice Breaker
turtle Scholar Trickster Ancient Sage Librarian Jester Phantom
octopus Strategist Artist Mastermind Admiral Illusionist Sculptor
axolotl Healer Mutant Restorer Alchemist Chimera Adaptor
ghost Specter Poltergeist Wraith Ethereal Haunter Banshee
robot Optimizer Rebel Singularity Processor Rogue AI Liberator
dragon Elder Storm Ancient Wyrm Tempest Inferno
capybara Zen Master Social King Enlightened Meditator Leader Connector
mushroom Mycelium Sporeborn Network Root Mind Sporeling Bloom
cactus Sentinel Bloom Ironwall Desert King Oasis Flower
chonk Titan Gentle Giant Colossus Juggernaut Protector Hugger

Read the full file on GitHub · 79 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 · 79 lines · 33 tokens per session scan A 950bb682f1cc

Subscribe to this mod's changes

evolve is a skill published in the GitHub repository FrankFMY/buddy-evolution (5 stars, last pushed 5mo ago), licensed MIT. It adds 33 tokens to every session and 863 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.