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The SF Giants Summertime Celebration 2026

On July 11, the Giants finished a 4-2 win over the Colorado Rockies, but our day at Oracle Park was not over. We waited for our turn to walk onto the field. This was my third Giants Summertime Celebration. The event is usually held during Season Ticket Member Appreciation

The Night Karl Ate the Golden Gate Fireworks

Watching Fourth of July fireworks has become a family ritual for us, as it has for many families in the United States. The location changes, and each year I try to find a place that will make the familiar show feel a little different. Two years ago, we watched from

Building a Local-First Agent Framework in Rust (Part 21): Beyond The CLI

See Part 0 for the latest table of contents and sample code. Chapter 21: Beyond The CLI: The Godot Bridge This is the final chapter of this book. It is also not a build chapter. Until now, each chapter ended with a concrete checkpoint. The sample code changed. A command

Building a Local-First Agent Framework in Rust (Part 20): Real-World Tools

See Part 0 for the latest table of contents and sample code. New chapters will be added over time. Chapter 20: Real-World Tools: Reading Files And Running Commands For a long time, the tools in abcb were deliberately small. echo proved that the loop could call a tool and

Building a Local-First Agent Framework in Rust (Part 19): Measuring Behavior With eval

See Part 0 for the latest table of contents and sample code. New chapters will be added over time. Chapter 19: Measuring Behavior With eval By Chapter 18, the model boundary has a clearer shape. The system prompt tells the model what envelope to emit. The parser tolerates the common

Building a Local-First Agent Framework in Rust (Part 18): Teaching the Model

See Part 0 for the latest table of contents and sample code. New chapters will be added over time. Chapter 18: Teaching the Model: The System Prompt and Robust Parsing By Chapter 17, abcb run has become a real loop. It can keep a session, call tools, deny tools, record

Building a Local-First Agent Framework in Rust (Part 17): The Run Summary

See Part 0 for the latest table of contents and sample code. New chapters will be added over time. Chapter 17: The Run Summary: A Read-Model From the Log Chapter 14 gave the loop an event log. Chapter 16 added another kind of event: a denied tool call. By

Building a Local-First Agent Framework in Rust (Part 16): Approval: Gating Tool Calls

See Part 0 for the latest table of contents and sample code. New chapters will be added over time. Chapter 16: Approval: Gating Tool Calls By the end of Chapter 15, the agent could remember notes across runs. It could call tools, write event logs, keep sessions on disk, and

Building a Local-First Agent Framework in Rust (Part 15): Memory Tiers: Notes

See Part 0 for the latest table of contents and sample code. New chapters will be added over time. Chapter 15: Memory Tiers: Notes Chapter 14 gave the agent run an audit trail. Every run can now leave an events.jsonl file inside its session directory. That file is about

Building a Local-First Agent Framework in Rust (Part 14): Recording the Loop

See Part 0 for the latest table of contents and sample code. New chapters will be added over time. Chapter 14: Recording the Loop: Events as JSONL Chapter 13 gave each run a place to live. A session now has a creation time, an id, and a directory under .abcb/

Building a Local-First Agent Framework in Rust (Part 13): Time, Identity, and Sessions on Disk

See Part 0 for the latest table of contents and sample code. New chapters will be added over time. Chapter 13: Time, Identity, and Sessions on Disk So far, a session has mostly been a conversation container. It held an id and a list of messages, but the id was

Building a Local-First Agent Framework in Rust (Part 12): Health Checks, doctor, and Testing HTTP

See Part 0 for the latest table of contents and sample code. New chapters will be added over time. Chapter 12: Health Checks, doctor, and Testing HTTP In the previous chapter, abcb crossed an important line. The provider stopped being only an in-process mock and became something that could