Prospective · frozen 2026-10-08 snapshot

Hegotá candidate complexity assessment

EL-rubric total by EIP-8081 list: Scheduled 77 (2 EIPs); with Considered 385 (19); with Proposed 513 across 25 scored EIPs, using the lists after ACDE 247. 8 entries are not applicable to the Execution Layer rubric. EIP-7666 and EIP-8355 were declined (DFI) and remain listed below, excluded from every total.

Independent LLM Evaluation. These scores were produced with Claude Opus 5.5 under checklist revision 3, the same LLM and rubric as the retrospective study, independently of the STEEL team’s ongoing manual assessment work. The Human column below records where that manual work stands for each candidate.

EIP-8081 lists as of ACDE 247 (EIPs f154af8, 2026-10-08). Scores are unchanged from the assessment at 6dac5e7. Not yet assessed, so not shown or counted: EIP-7907 Meter Contract Code Size (PFI), EIP-8360 TCREATE Opcode (CFI).

Common information cutoff: 2026-10-07T22:23:55Z. The assessment covers Execution Layer and execution-client networking surfaces only. It does not predict final fork scope or include observed outcomes. Combine the lists into a scope in the Hegotá scope builder.

Scored EL surfaces

8 not applicable

Low / Medium / High

6 / 12 / 9

Under-specified at snapshot

26 / 27

Human checklists

15 of 35

Complete 2
Available in open PR 8
Draft PR 5
Pending 20

15 Human/LLM comparisons

Human checklist sources: ethspecs/pm at 2026-08-14 plus 24 open pull requests (captured 2026-09-13)

Statuses follow the real source state. Complete is merged on main; Available in open PR exists only in an open pull request; Draft PR is in a draft pull request; Incomplete has unresolved cells or inconsistent totals and carries no score; Pending has no checklist anywhere. A missing checklist is never a zero.

#73 Add complexity assessments · EIP-4758, EIP-7709, EIP-8188, EIP-8205 · updated 2026-05-29
#105 Add EIP-4758 complexity assessment · EIP-4758 · updated 2026-08-17
#106 Add EIP-8146 complexity assessment · EIP-8146 · updated 2026-08-17
#108 Add EIP-8279 complexity assessment (draft) · EIP-8279 · updated 2026-08-17
#109 Add EIP-8200 complexity assessment (draft) · EIP-8200 · updated 2026-08-18
#110 Add EIP-8372 complexity assessment (draft) · EIP-8372 · updated 2026-08-24
#111 Add EIP-8250 complexity assessment (draft) · EIP-8250 · updated 2026-08-18
#112 Add EIP-7666 complexity assessment (draft) · EIP-7666 · updated 2026-08-18
#113 Add EIP-7645 complexity assessment · EIP-7645 · updated 2026-08-18
#114 Add EIP-2488 complexity assessment · EIP-2488 · updated 2026-08-18
#115 Add EIP-3298 complexity assessment · EIP-3298 · updated 2026-08-18
#116 Update EIP-5920 complexity assessment to checklist revision 2 · EIP-5920 · updated 2026-08-18
#118 Update EIP-7668 complexity assessment to checklist revision 2 · EIP-7668 · updated 2026-08-18
#120 Add EIP-7709 complexity assessment · EIP-7709 · updated 2026-08-24
#122 Rename checklist "anchors" to "criteria" (draft) · EIP-5920, EIP-7668, EIP-7805, EIP-8141 · updated 2026-08-20
#124 Add EIP-7862 complexity assessment · EIP-7862 · updated 2026-08-24
#125 Add EIP-8188 complexity assessment · EIP-7862, EIP-8188 · updated 2026-08-24
#126 Add EIP-8115 complexity assessment (draft) · EIP-8115 · updated 2026-08-24
#127 Add EIP-8304 complexity assessment · EIP-8304 · updated 2026-08-24
#128 Add EIP-7819 complexity assessment (draft) · EIP-7819 · updated 2026-08-24
#129 Add EIP-8368 complexity assessment (draft) · EIP-8368 · updated 2026-08-24
#132 Add EIP-7906 complexity assessment · EIP-7906 · updated 2026-08-24
#133 Add EIP-8272 complexity assessment · EIP-8272 · updated 2026-08-25
#134 Add EIP-7923 complexity assessment · EIP-7923 · updated 2026-08-25

Where the Complexity Comes From

Each segment sums one criterion across the fork's scored LLM assessments. Hover or focus a segment for its points, share, and the number of contributing EIPs.

View Absolute complexity (bar length is the fork total) Composition (each fork normalized to 100%)

Hegotá513 points · 25 EIPs

Composition table: points per criterion and fork

Hegotá: criterion points across 27 scored candidates
Criterion	Hegotá
Added opcodes	13 · 3% · 5 EIPs
Modified opcodes	15 · 3% · 5 EIPs
Modified precompiles	3 · 1% · 1 EIP
Added system contracts	9 · 2% · 5 EIPs
Modified system contracts	4 · 1% · 3 EIPs
EVM Gas rule changes	18 · 4% · 12 EIPs
State-access ordering within opcode execution	15 · 3% · 8 EIPs
Blob gas accounting changes	5 · 1% · 3 EIPs
State gas accounting changes	14 · 3% · 7 EIPs
New EVM gas refund	2 · 0% · 1 EIP
New transaction types	3 · 1% · 1 EIP
New or modified transaction validity mechanisms	20 · 4% · 10 EIPs
New block / header fields	3 · 1% · 1 EIP
Encoding changes (RLP/SSZ)	33 · 6% · 11 EIPs
Block syncing changes	18 · 4% · 9 EIPs
New fork activation mechanism	9 · 2% · 3 EIPs
Engine API changes	9 · 2% · 5 EIPs
Transition-tool interface changes	16 · 3% · 11 EIPs
Patterns affecting pre-existing tests	40 · 8% · 23 EIPs
New invariant on pre-existing tests	10 · 2% · 6 EIPs
New test-framework primitives	30 · 6% · 21 EIPs
Security risks	40 · 8% · 24 EIPs
Performance risks	29 · 6% · 19 EIPs
Edge/boundary conditions	51 · 10% · 23 EIPs
Cryptography	6 · 1% · 3 EIPs
Cross-EIP interactions	59 · 12% · 23 EIPs
Unspecified behavior requiring cross-client consensus	39 · 8% · 24 EIPs
Total	513

Complexity Assessments

LLM rows were produced by Claude Opus 5.5 at high effort, evaluating the EIP revision linked in the Assessment Input column against revision 3 of STEEL’s complexity-assessment template. Human rows are STEEL reviewers’ published checklists; their status badge links to the pull request or merged report. Select rows from either evaluator to compare them, or open an EIP for its full assessment.

All EIPs were evaluated at the same ethereum/EIPs commit, 6dac5e7. Human checklist evaluation dates are not recorded.

Hegotá candidates at EIPs 6dac5e7: one row per evaluator, with not-applicable entries and pending human checklists counted above

EIP-3298 Remove storage-clear refund and refund cap	CFI	2026-10-08	LLMChecklist v3	Complete	10	Low	No
EIP-3298 Remove storage-clear refund and refund cap	CFI	Not recorded	HumanChecklist v2	Open PR	6	Low	—
EIP-4758 Deactivate SELFDESTRUCT	CFI	2026-10-08	LLMChecklist v3	Complete	11	Low	Yes
EIP-4758 Deactivate SELFDESTRUCT	CFI	Not recorded	HumanChecklist v2	Open PR	8	Low	—
EIP-5920 PAY opcode	CFI	2026-10-08	LLMChecklist v3	Complete	18	Medium	Yes
EIP-5920 PAY opcode	CFI	Not recorded	HumanChecklist v2	Open PR	14	Medium	—
EIP-7666 EVM-ify the identity precompile	DFI	2026-10-08	LLMChecklist v3	Complete	18	Medium	Yes
EIP-7666 EVM-ify the identity precompile	DFI	Not recorded	HumanChecklist v2	Draft PR	12	Medium	—
EIP-7668 Remove bloom filters	CFI	2026-10-08	LLMChecklist v3	Complete	12	Medium	Yes
EIP-7668 Remove bloom filters	CFI	Not recorded	HumanChecklist v2	Open PR	7	Low	—
EIP-7709 Read BLOCKHASH from Storage and Update Cost	CFI	2026-10-08	LLMChecklist v3	Complete	14	Medium	Yes
EIP-7709 Read BLOCKHASH from Storage and Update Cost	CFI	Not recorded	HumanChecklist v2	Open PR	17	Medium	—
EIP-7805 Fork-choice enforced Inclusion Lists (FOCIL)	SFI	2026-10-08	LLMChecklist v3	Complete	25	High	Yes
EIP-7805 Fork-choice enforced Inclusion Lists (FOCIL)	SFI	Not recorded	HumanChecklist v1	Complete	15	Medium	—
EIP-7906 Transaction Assertions via State Diff Opcode	CFI	2026-10-08	LLMChecklist v3	Complete	27	High	Yes
EIP-7906 Transaction Assertions via State Diff Opcode	CFI	Not recorded	HumanChecklist v2	Open PR	23	High	—
EIP-7979 Call and Return Opcodes for the EVM	CFI	2026-10-08	LLMChecklist v3	Complete	13	Medium	Yes
EIP-8025 Optional Execution Proofs	PFI	2026-10-08	LLMChecklist v3	Complete	25	High	Yes
EIP-8077 eth/XX - announce transactions with nonce	CFI	2026-10-08	LLMChecklist v3	Complete	8	Low	Yes
EIP-8116 Replace cumulative receipt fields	CFI	2026-10-08	LLMChecklist v3	Complete	9	Low	Yes
EIP-8131 Unified Transaction Content Floor	CFI	2026-10-08	LLMChecklist v3	Complete	16	Medium	Yes
EIP-8141 Frame Transaction	SFI	2026-10-08	LLMChecklist v3	Complete	52	High	Yes
EIP-8141 Frame Transaction	SFI	Not recorded	HumanChecklist v1	Complete	38	High	—
EIP-8142 Block-in-Blobs (BiB)	PFI	2026-10-08	LLMChecklist v3	Complete	41	High	Yes
EIP-8148 Custom sweep threshold for validators	PFI	2026-10-08	LLMChecklist v3	Complete	19	Medium	Yes
EIP-8151 Account Code Restricted ecRecover	CFI	2026-10-08	LLMChecklist v3	Complete	18	Medium	Yes
EIP-8198 Quick Slots	CFI	2026-10-08	LLMChecklist v3	Complete	17	Medium	Yes
EIP-8205 Withdrawal credentials preregistration	PFI	2026-10-08	LLMChecklist v3	Complete	16	Medium	Yes
EIP-8205 Withdrawal credentials preregistration	PFI	Not recorded	HumanChecklist v1	Open PR	5	Low	—
EIP-8250 Keyed Nonces for Frame Transactions	CFI	2026-10-08	LLMChecklist v3	Complete	42	High	Yes
EIP-8250 Keyed Nonces for Frame Transactions	CFI	Not recorded	HumanChecklist v2	Draft PR	22 published 20	Medium	—
EIP-8253 Bump nonce of zero-nonce storage accounts	CFI	2026-10-08	LLMChecklist v3	Complete	11	Low	Yes
EIP-8272 Recent Roots for Frame Transactions	CFI	2026-10-08	LLMChecklist v3	Complete	24	High	Yes
EIP-8272 Recent Roots for Frame Transactions	CFI	Not recorded	HumanChecklist v2	Open PR	14	Medium	—
EIP-8279 Block Access List Byte Floor	CFI	2026-10-08	LLMChecklist v3	Complete	24	High	Yes
EIP-8279 Block Access List Byte Floor	CFI	Not recorded	HumanChecklist v2	Draft PR	22	Medium	—
EIP-8298 SETCODEFROM Code Reuse Instruction	CFI	2026-10-08	LLMChecklist v3	Complete	34	High	Yes
EIP-8355 Precompiles for ML-DSA Verification	DFI	2026-10-08	LLMChecklist v3	Complete	12	Medium	Yes
EIP-8368 CPSB Recalibration for New Gas Limit	PFI	2026-10-08	LLMChecklist v3	Complete	11	Low	Yes
EIP-8368 CPSB Recalibration for New Gas Limit	PFI	Not recorded	HumanChecklist v2	Draft PR	16	Medium	—
EIP-8372 Normalized state gas limit	PFI	2026-10-08	LLMChecklist v3	Complete	16	Medium	Yes
EIP-8372 Normalized state gas limit	PFI	Not recorded	HumanChecklist v2	Draft PR	20	Medium	—

Scored proposals

Every scored assessment as a stacked complexity bar, ranked by total on one shared scale. Switch evaluator to rank the human checklists, or show both per EIP. The 8 not-applicable entries remain in the table above.

Evaluator LLM (27) Human (15) Both, ranked by LLM

EIP-8141 Frame TransactionSFIChecklist revision 3
EIP-8250 Keyed Nonces for Frame TransactionsCFIChecklist revision 3
EIP-8142 Block-in-Blobs (BiB)PFIChecklist revision 3
EIP-8298 SETCODEFROM Code Reuse InstructionCFIChecklist revision 3
EIP-7906 Transaction Assertions via State Diff OpcodeCFIChecklist revision 3
EIP-7805 Fork-choice enforced Inclusion Lists (FOCIL)SFIChecklist revision 3
EIP-8025 Optional Execution ProofsPFIChecklist revision 3
EIP-8272 Recent Roots for Frame TransactionsCFIChecklist revision 3
EIP-8279 Block Access List Byte FloorCFIChecklist revision 3
EIP-8148 Custom sweep threshold for validatorsPFIChecklist revision 3
EIP-5920 PAY opcodeCFIChecklist revision 3
EIP-7666 EVM-ify the identity precompileDFIChecklist revision 3
EIP-8151 Account Code Restricted ecRecoverCFIChecklist revision 3
EIP-8198 Quick SlotsCFIChecklist revision 3
EIP-8131 Unified Transaction Content FloorCFIChecklist revision 3
EIP-8205 Withdrawal credentials preregistrationPFIChecklist revision 3
EIP-8372 Normalized state gas limitPFIChecklist revision 3
EIP-7709 Read BLOCKHASH from Storage and Update CostCFIChecklist revision 3
EIP-7979 Call and Return Opcodes for the EVMCFIChecklist revision 3
EIP-7668 Remove bloom filtersCFIChecklist revision 3
EIP-8355 Precompiles for ML-DSA VerificationDFIChecklist revision 3
EIP-4758 Deactivate SELFDESTRUCTCFIChecklist revision 3
EIP-8253 Bump nonce of zero-nonce storage accountsCFIChecklist revision 3
EIP-8368 CPSB Recalibration for New Gas LimitPFIChecklist revision 3
EIP-3298 Remove storage-clear refund and refund capCFIChecklist revision 3
EIP-8116 Replace cumulative receipt fieldsCFIChecklist revision 3
EIP-8077 eth/XX - announce transactions with nonceCFIChecklist revision 3

Caveats

EL-rubric totals cover execution-layer testing work only; consensus-only and informational entries have no score, not a score of zero.
EIP-8081's lists are still changing; a total describes one snapshot, not the eventual Hegotá scope.
Overlapping EIPs and split proposals can double count or hide shared work.
Layer dispositions for the seven candidates added since the previous snapshot are provisional.

Download all assessments Publication JSON

Criterion legend and glossary

Every stacked bar, comparison matrix, and criterion table on this site uses the same criterion colours, abbreviations, and order. Colour marks the criterion group; the abbreviation and name identify the criterion. Scores are 0–3 per criterion (4 is exceptional; cross-EIP interactions is uncapped).

EVM surface

Opcodes, precompiles, and system contracts that are added or modified.

Added opcodes
Introduces new opcodes
Modified opcodes
Modifies pre-existing opcodes
Added precompiles
Introduces new precompiles
Modified precompiles
Modifies pre-existing precompiles logic or gas-accounting
Added system contracts
Introduces new system contract, stateful or not
Modified system contracts
Modifies pre-existing system contracts

Gas and accounting

Execution, blob, and state gas rules, refunds, and where charges happen inside opcodes.

EVM Gas rule changes
New EVM gas accounting rules
State-access ordering within opcode execution · not in checklist revision 1
Changes *where inside an opcode's execution* state is accessed, or where gas is charged relative to that access. Because a state access is recorded in the block-level access list only if execution had enough gas to reach it, this ordering is consensus-critical: moving it changes the BAL at every gas boundary of every affected opcode.
Blob gas accounting changes
New Blob gas accounting rules which potentially affect pre-existing tests
State gas accounting changes · not in checklist revision 1
New state gas accounting rules. State gas is the cost of *writing* state, as opposed to accessing or executing it: `StateGasCosts`, `COST_PER_STATE_BYTE`, the block-level state gas budget, and the spill path into execution gas.
New EVM gas refund
New gas-refund mechanism

Blocks, transactions, and encoding

Transaction types and validity, block and header fields, encodings, syncing, and activation-time changes.

New transaction types
Introduces a new transaction type
New or modified transaction validity mechanisms
Creates new or modifies pre-existing transaction types' validation mechanisms
New block / header fields
Introduces new block or block header fields
Encoding changes (RLP/SSZ)
Introduces encoding changes at the transaction/block/interfaces level
Block syncing changes
Modifies block RLP validation mechanisms that require test client syncing.
New fork activation mechanism
Modifies state, internal variables, or similar, at the fork activation block

Client interfaces

Engine API and transition-tool interface changes.

Engine API changes
Introduces new fields to the Engine API directives
Engine API encoding changes · Checklist revision 1 only
Engine API encoding changes (the revision-1 template defines no anchor text for this row).
Transition-tool interface changes
Modifies or adds new fields to the transition tool interface.

Testing impact

Rework, new invariants, and new primitives required in the test framework.

Patterns affecting pre-existing tests
Implements a new validation mechanism or rule that translates in reworking pre-existing tests
New invariant on pre-existing tests · not in checklist revision 1
Tests that are **not about this EIP** must nonetheless assert something this EIP produces. Their logic does not change; they gain a new thing to check.
New test-framework primitives · not in checklist revision 1
Requires new abstractions in the test framework itself — expectation types, modifiers, helpers — beyond writing test functions with what already exists.

Risk and validation

Security, performance, boundary conditions, and cryptography that need validation.

Security risks
Introduces or modifies mechanisms that could compromise the security of the chain, users, validators, or other stakeholders, if not implemented properly.
Performance risks
Introduces or modifies mechanisms and requires performance validation.
Edge/boundary conditions
Feature contains edge/boundary conditions.
Cryptography
Introduces new cryptography mechanisms or modifies existing functionality that involves cryptography

Coordination

Cross-EIP interactions and behavior that clients must agree on before tests exist.

Cross-EIP interactions
Introduces or modifies mechanisms that affect other EIPs in either the same or past forks.
Unspecified behavior requiring cross-client consensus · not in checklist revision 1
The EIP text does not determine the answer for cases a test can construct. Clients must agree on a previously unspecified detail before tests can be baselined. The cost here is coordination and re-baselining, not test writing.