Blog

Architecture Coming soon

Why We Chose an Event-Sourced Memory Graph Over a Vector DB

Jun 2026

Memory should be rebuildable, not approximate. The HMAC event log + ArangoDB graph gives us provenance, bi-temporal validity, and zero data loss on DB failure.

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Engineering Coming soon

Docker Default-Deny Sandboxes: How Frontal Isolates Agent Work

Jun 2026

Every task gets its own worktree AND its own container with no outbound network. Here's how the egress proxy + allowlist actually work.

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Release Coming soon

Frontal v0.1: The Golden Path Is Green

Jun 2026

Create → intake → plan → approve → real engine writes code → sandboxed pytest → acceptance → merge → preview → rollback. End-to-end, against the real Pi binary.

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Architecture Coming soon

Gateway-Only Model Access: Why Pi Never Sees Your API Keys

Jun 2026

Provider keys live in os.environ, never reach the engine subprocess. The local gateway is the single metering point and failover authority.

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Engineering Coming soon

The Watchdog Ladder: Ping, Inspect, Repair, Takeover

Jun 2026

How we detect stuck agents using process-level ground truth + activity-typed silence budgets, then recover without killing the session.

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Engineering Coming soon

Dual-Engine: Running Our Native Engine Alongside Pi

Jun 2026

D-037 — per-task engine selection with an A/B harness. Why we built our own engine without abandoning Pi.

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