What really limits the Agent is the same model of Harness. If you change the set of Har...

What really limits the Agent is the same model of Harness.

If you change the set of Harness, the range of tasks that can be completed may be completely different.

This 5-minute essence explains capability overhang with Fable and Pokémon examples: Once the model is plugged into Bash, Filesystem, and code execution, it can actively search, write screening scripts, and validate answers.

In the face of a large codebase, without having to cram the entire repo into the context, the Agent can build a dynamic working set through the Tool.

The model image enters the open world, but "can build" still does not mean "valuable".

Finally, there are realistic thresholds such as user verification, retention, and business value.

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Article argument map

Generated from the post's content graph

Mermaid outline

flowchart LR
  format-long_post["longform note"]
  topic-agents["agents"]
  topic-harness-engineering["harness engineering"]
  topic-technical-distribution["technical distribution"]
  topic-memory["memory"]
  topic-retrieval["retrieval"]
  capability-agent-workflow["agent workflow"]
  capability-harness-engineering["harness engineering"]
  capability-developer-tooling["developer tooling"]
  format-long_post -->|covers| topic-agents
  format-long_post -->|covers| topic-harness-engineering
  format-long_post -->|covers| topic-technical-distribution
  format-long_post -->|covers| topic-memory
  format-long_post -->|covers| topic-retrieval
  format-long_post -->|signals| capability-agent-workflow
  format-long_post -->|signals| capability-harness-engineering
  format-long_post -->|signals| capability-developer-tooling

Visual structure

Essay structure map

Built from summary and key paragraph positions

Mermaid outline

flowchart LR
  thesis["What really limits the Agent is the same model of Harness. If you change the set of Harness, the range of t..."]
  signal["What really limits the Agent is the same model of Harness."]
  operator["In the face of a large codebase, without having to cram the entire repo into the context, the Agent can bui..."]
  implication["Finally, there are realistic thresholds such as user verification, retention, and business value."]
  thesis -->|frames| signal
  signal -->|develops| operator
  operator -->|lands in| implication

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