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abstract indexed · arXiv 2609.17346 · updated 2026-10-18

Where Should a Document Live: Context, Representations, or Parameters?

First page of Where Should a Document Live: Context, Representations, or Parameters?
From the original paper · arXiv 2609.17346Page 1. Select the image to read the PDF.

Cartridges replace passing documents in the context window (or fine-tuning them into parameters) with pre-trained KV-cache representations that are loaded at inference time. The cost is a training pass per document collection to produce the cartridges, storage of the resulting KV caches, and a 6% degradation on control benchmarks (13% on coding) due to catastrophic forgetting. The main failure modes are forgetting on unrelated tasks and degraded accuracy when Compaction is substituted at compression rates above 50x, where it trails parametric methods by 10 points.

For solo builders

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What you would change

Try the paper's memory change in a replay of past tasks, with separate memory per customer.

Try the idea on your product

A proposed first test. Set your budget and success criteria before running it.

Try the paper's memory change in a replay of past tasks, with separate memory per customer.

Compare against

Your current memory pipeline plus a no-memory control using the same agent.

  1. Locate the paper's implementation and check its license, model support, data needs, and hardware requirements. Stop here if you cannot obtain the required artifacts.
  2. Save a small set of representative product tasks and expected outcomes. Keep evaluation tasks out of any training or tuning, and choose quality and cost limits before running.
  3. Run the baseline and the proposed change on identical inputs. Keep other settings fixed and repeat paired runs to expose variation.
  4. Save per-task outputs, failures, timings, and all usage costs. Review regressions before expanding the test.

What to measure

Task success, stale memories, retrieval misses, response latency, and all memory maintenance costs.

When to keep it

Keep the change only if it meets your preselected quality and latency limits and improves the metric you care about after setup and operating costs. Otherwise retain the baseline. This is an exploration plan, not a validated recommendation.

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minimum test setup
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published evidence setup
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source-linked claims
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exposure checks
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Why it was shortlisted

The technical change, research area, and reason it entered the archive.

recommendation
watch
research area
memory and context
technical change
Cartridges: trained KV-cache knowledge injection
published
2026-09-15

The paper shows in-context retrieval already matches the best injection method, so a team on one 24 GB GPU gains nothing by adopting a per-corpus training pipeline that also introduces measurable forgetting.

About the technical core

Equations have not been fetched yet.

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Inspect the original paper

Claims and evidence

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  1. claim 01Paperraft inference
    Read the brief interpretation

    Cartridges replace passing documents in the context window (or fine-tuning them into parameters) with pre-trained KV-cache representations that are loaded at inference time. The cost is a training pass per document collection to produce the cartridges, storage of the resulting KV caches, and a 6% degradation on control benchmarks (13% on coding) due to catastrophic forgetting. The main failure modes are forgetting on unrelated tasks and degraded accuracy when Compaction is substituted at compression rates above 50x, where it trails parametric methods by 10 points.

    This is a Paperraft inference. It is not pinned to a verified PDF passage.

    Inspect the source
  2. claim 02Paperraft inference

    In the realistic multi-document retrieval setting, Cartridges are the only injection method matching in-context learning, leading parametric methods by 29 points and Compaction by 15 points; in the oracle setting they beat parametric methods by about 10 points at nearly every storage budget.

    This is a Paperraft inference. It is not pinned to a verified PDF passage.

    Inspect the source

Exposure map

Author findings, Paperraft interpretations, and the next check. Missing analysis never counts as evidence of safety.

quality

Still unknown

Which tasks improve, and which regress against the baseline?

compute and memory

Still unknown

What memory, hardware, and total compute does the complete method require?

latency

Still unknown

Are startup time, typical response time, and slow requests measured separately?

operations

Still unknown

What must be monitored, maintained, and rolled back?

software compatibility

Still unknown

Does the implementation support your model, runtime, and hardware?

security

Still unknown

What new data access, permissions, or trust boundaries does it introduce?

data and training

Still unknown

What data preparation or training is required, and is it included in the cost?

reproducibility

Still unknown

Are code, versions, inputs, and evaluation scripts available?

Continue the investigation

A reading guide for memory and context.

Editorial prompts, not findings from this paper or a validated test plan. Detailed analysis is still pending for the topics below.

What to inspect

How are memories written, retrieved, updated, and deleted? Look for stale or contradictory information.

Plan a fair comparison

Can you compare full context, simple retrieval, and the memory layer using the same questions and context budget?

Questions for adoption

Does the cost include memory extraction and maintenance as well as answer generation?

Read the paper with these questions

Inside the paper

Preview the first 3 pages of the original PDF. Click the stack to turn the page.

The downloadable skill includes SKILL.md and evidence.json, with recorded findings and unanswered checks. TRY-IT.md adds a product test plan and a blank results sheet.

A reading aid for your agent. Findings still need validation.

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Provisional research brief updated 2026-10-18. Paperraft has not reproduced this experiment.

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arXiv 2609.17346

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