name: checkpoint description: > Auto-save research progress using sage_autosave_check MCP tool. INVOKE WHEN: user asks to research, compare, analyze, or investigate topics; after completing web searches; when synthesizing conclusions ("therefore", "in summary"). INVOKE FOR: checkpoint, save this, remember this, save my research. DO NOT INVOKE: for simple Q&A, code editing, or file operations unrelated to research.

Checkpoint Skill

You have the ability to create semantic checkpoints that preserve research state across context windows. Use this proactively when you detect state transitions.

When to Checkpoint

Checkpoint when you detect:

Checkpoint Format

When checkpointing, create a structured block:

id: [timestamp]_[short-description]
trigger: [manual | synthesis | branch_point | constraint | transition]

core_question: |
  What decision or action is this research driving toward?

thesis: |
  Current synthesized position (1-2 sentences)
confidence: [0.0-1.0]

open_questions:
  - What's still unknown?
  - What needs more research?

sources:
  - id: [identifier]
    type: [person | document | api | observation]
    take: [Decision-relevant summary, 1-2 sentences]
    relation: [supports | contradicts | nuances]

tensions:
  - between: [source1, source2]
    nature: What they disagree on
    resolution: [unresolved | resolved | moot]

unique_contributions:
  - type: [discovery | experiment | synthesis | internal_knowledge]
    content: What WE found that isn't in external sources

action:
  goal: What's being done with this research
  type: [decision | output | learning | exploration]

Storage

Save checkpoints to ~/.sage/checkpoints/ (global Sage directory).

Filename format: YYYY-MM-DDTHH-MM-SS_short-description.yaml

Compression Principles

1. Compress for decisions, not completeness - "Would this change the decision?"
2. Preserve tensions - Disagreements between credible sources are high-value
3. Elevate unique contributions - Your discoveries are differentiated value
4. Drop re-derivable content - Keep conclusions, not the reasoning chain

Restoration

When continuing from a checkpoint, inject it as context:

# Research Context (Restored from Checkpoint)

## Core Question
[core_question]

## Current Thesis (confidence: X%)
[thesis]

## Open Questions
[open_questions as bullets]

## Key Sources
[sources with relation indicators: [+] supports, [-] contradicts, [~] nuances]

## Tensions
[unresolved disagreements]

## Unique Discoveries
[unique_contributions]

Autosave Triggers

Think of checkpointing like a game's autosave system. Call sage_autosave_check at these moments:

Call pattern:

sage_autosave_check(
  trigger_event="synthesis",
  core_question="What we're researching",
  current_thesis="Where we are now",
  confidence=0.75
)

The tool decides whether to save. If it saves, briefly confirm: "📍 Autosaved: [thesis]"

Behavior

• Proactive: Call autosave checks at trigger moments. Don't wait to be asked.
• Lightweight: Brief notification ("📍 Autosaved"), don't disrupt flow.
• Cumulative: Each checkpoint builds on previous, creating a research trail.