Skill: Tiered Agent Memory

Status (v0.10.0): This skill describes a design proposal, not a shipped runtime. Skill files install via squad init/upgrade, but the underlying tier scaffolding (.squad/memory/hot/, cold/, wiki/), Scribe promotion logic, and spawn-template tier-aware reads are tracked in bradygaster/squad#1264. Until those land, agents continue to load full history.md + decisions.md on every spawn.

Overview

Squad agents today load their full context history on every spawn, which grows unboundedly across sessions. The Tiered Agent Memory model proposes a three-tier separation so agents only load the bytes that are actually relevant to the current task, with older context kept available on demand.

Memory Tiers

🔥 Hot Tier — Current Session Context

• Size target: keep small (~2–4KB typical)
• Load policy: Always loaded. Every spawn includes hot memory by default.
• Contents: Current task description, active decisions made this session, immediate blockers, last 3–5 actions taken, who you are talking to right now.
• Lifetime: Current session only. Discarded after session ends (Scribe promotes relevant parts to Cold).
• Purpose: Provide immediate task context without any latency or load decision.