Self-improving AI / Fibona Agent
Fibona Agent
“Fibona Agent is a minimal, general-purpose, self-improving agent that writes its own code as it runs.”
Fibona Agent is one of the projects on the self-improving AI map. Below is what it changes about itself, whether the change lasts, and whether it improves the improver, each with the line from its own source.
Where it sits
Columns: what it changes, from the surface to the deepest change. Rows: whether the change outlasts the run. A number is how many projects sit in that square. See it on the 3D map
- What it changes
- Tools, harness, its own code“The agent could then decide how each step works by writing its own harness code as it runs.”
- Does the change last
- Gone when the run ends“session changes are not automatically preserved across runs”
- Does it improve the improver
- improves the task agent; no evidence the improver got better“the smallest possible immutable core that can act and repair the agent”
- Who sets the goals
- people set tasks and scoring“The welcome screen waits for a task before any model call.”
- How it was tested
- demos only“Try the online demo in your browser.”
The line about runs is in the terminal bootstrap README, not the top-level README. The core that drives self-modification is immutable by design. No benchmark numbers in the README or tech report.
Does it count as RSI?
It depends on the definition. Under the four used on What counts as RSI, by what its own source says:
- Loose (Eliezer Yudkowsky, Intelligence Explosion Microeconomics (2013)): does not count
- Durable (Ren et al., self-improvement survey (2026)): does not count
- Strict (Roman Yampolskiy, From Seed AI to Technological Singularity (2015)): does not count
- Autonomous (Anthropic, When AI builds itself): does not count
How it got here
Earlier work in this catalog that Fibona Agent cites, oldest first. Under each: where that work sits on the map, then where Fibona Agent sits (changes in bold), and what Fibona Agent's own paper says about it. Its whole family on the citation map
Cites Reflexion 2023, Voyager 2023, STOP 2023, ADAS 2024, Gödel Agent 2024, SICA 2025, Darwin Gödel Machine 2025, Hyperagents 2026, Weco AIDE² 2026