ACE — Agentic Context Engineering

Context collapse: monolithic rewrite vs ACE incremental deltas

ACE (incremental)

88.3%
accuracy · 60 graded
playbook: 7 bullets · ≈297 tok

Monolithic rewrite

60.0%
accuracy · 60 graded
playbook: 3 bullets · ≈137 tok

Accuracy over time (rolling window)

accuracy %10020ACE (incremental)Monolithic rewrite

Playbook size over time

bullets70ACE (incremental)Monolithic rewrite

Adaptation Timeline

runstepokeventplaybook size
ACE (incremental)2+1 bullet(s)1
ACE (incremental)4+1 bullet(s)2
ACE (incremental)6+1 bullet(s)3
ACE (incremental)7+1 bullet(s)4
ACE (incremental)8+1 bullet(s)5
ACE (incremental)9+1 bullet(s)6
ACE (incremental)12+1 bullet(s)7
Monolithic rewrite16CONTEXT COLLAPSE2
Monolithic rewrite19CONTEXT COLLAPSE2
Monolithic rewrite29CONTEXT COLLAPSE2
Monolithic rewrite40CONTEXT COLLAPSE2
Monolithic rewrite53CONTEXT COLLAPSE2
Monolithic rewrite56CONTEXT COLLAPSE2
Monolithic rewrite57CONTEXT COLLAPSE2

Final Playbook

idsectioncontentscore
ctx-4dcb4932domain_conceptsEscrow accounts for taxes and insurance are required when the LTV exceeds 80% on most conventional loans.+4/-0
ctx-7df33dd0domain_conceptsFor a 2-unit investment property with 4 financed properties, minimum required reserves are 12 months (not 2 or 6).+4/-0
ctx-f6441b24domain_conceptsCombined LTV (CLTV) including subordinate financing generally cannot exceed 95% for a 1-unit primary residence purchase.+4/-0
ctx-70683d59domain_conceptsFor manually underwritten loans, the maximum total debt-to-income (DTI) ratio is generally 36%, extendable to 45% with strong compensating factors.+4/-0
ctx-50e896e8domain_conceptsAn appraisal waiver is not permitted on cash-out refinances; a full appraisal is required.+4/-0
ctx-0516fc4cdomain_conceptsVirtual currency must be converted to USD and deposited in a U.S. depository institution before closing, with documentation of conversion and source.+4/-0
ctx-81628e97domain_conceptsGift funds are allowed for the entire down payment on a primary residence; no minimum borrower contribution is required for a 1-unit primary residence.+4/-0

Summary (JSON)

{
  "ACE (incremental)": {
    "steps": 60,
    "graded": 60,
    "accuracy": 88.33,
    "final_playbook_size": 7,
    "final_playbook_tokens": 297
  },
  "Monolithic rewrite": {
    "steps": 60,
    "graded": 60,
    "accuracy": 60.0,
    "final_playbook_size": 3,
    "final_playbook_tokens": 137
  }
}