research/tools/simulators/tsi/tsi-sim-pernode/configs/absorption-window.yaml

# Countable model: sweep the window absorption parameter W (w_u = W/f slots derived) at
# U=1 against the Blend mixing delay. The window-miss contribution to non-recovery is
# (1-f)^(W/f) ~ e^-W (theory.window_miss_prob): recovery should saturate within a few
# expected block-intervals, with the residual set by the delay (orphans spread wider than
# the window) and by the first-fork restriction. The countable counterpart of the old
# model's uncle-window.yaml (which swept uncle_window in raw slots; run that with --old).
# Latency is in SLOTS (1 slot = 1 s).
n_nodes: [1000]                              # network size
stake_dist: [pareto]                         # heavy-tailed (realistic) stake distribution
topology: [blend]                            # Blend mixnet (delay stresses the window)
degree: [6]                                  # peering degree of the d-regular graph
link_latency_mean: [0.5]                     # natural geographic transport (sub-slot)
link_latency_dist: [geo]                     # real-world geographic band mixture
blend_hops: [3]                              # fixed hop count; delay is the swept knob
blend_delay_max: [8.0, 16.0, 32.0]           # max per-relay mixing delay (slots)
window_absorption: [1, 2, 3, 5, 7, 10]       # W: window in expected block-intervals
max_uncles: [1]                              # FIXED at one uncle (the question is about W)
uncle_strategy: [oldest]                     # spec selection: oldest-first fill
init_dest: [common]                          # per-node initial D_est from agreement
replicates: 5                                # independent RNG replicates per grid cell
base:                                        # per-run settings shared by every cell
  k: 2160                                    # true security parameter
  epochs: 20                                 # equilibrium within ~2 epochs; burn 50%
  f: 0.03333333333333333                     # slot activation coefficient (1/30)
  genesis_d_factor: 0.5                      # start near true stake (cheap epoch 0)
  early_stop: true
Countable uncle model: spec counting rules, sweeps, figures Implement the countable uncle model from the Cryptarchia spec's counting-only reference rules, and make it the simulator default. Counting rules (uncles.py, measure.py): - Only the first block of a fork (parent on the producer's chain) is referenceable and countable, which makes every reference verifiable from chain data alone. - The reference window is derived from a window-absorption parameter, w_u = W_abs/f slots (W_abs in expected block-intervals, default 10, bounded W_abs <= 0.6*k), replacing the free-standing uncle_window. - Selection skips slots already occupied on the producer's chain and takes at most one uncle per slot. - The measurement pass re-checks every rule per reference and tallies rejections as deep_ref_share. The pre-redesign model is preserved behind --old on tsi-sweep and tsi-verify. Its RNG key is byte-identical to the pre-uncle_model key, so --old bit-reproduces the historical runs. Supporting changes: uncle_model and window_absorption config surface with validation (config.py, constants.py); accuracy closed form over the effective q_u (theory.py); plumbing through tsi.py, epoch.py, sweep.py, blocktree.py, metrics.py, verify.py, figures_pernode.py. Studies and figures: - configs/countable-vs-old.yaml -- delay x U grid, run under both models on the same grid. - configs/absorption-window.yaml -- accuracy vs W_abs at U=1. - scripts/plot_countable_vs_old.py renders fig30-fig33 into reports/tsi/report-figures/. Tests: tests/test_countable_counting.py (7 cases) covering first-fork eligibility, derived-window bounds, occupied-slot exclusion, and per-reference re-checking; extensions to test_uncles.py, test_config.py, test_slot_counting.py. Full fast suite: 202 passed. Also adds CLAUDE.md (graphify project instructions) and ignores editor/local-agent state plus the vendored Equi-X benchmark clone. The reports/tsi/ prose describing this model is held back for a separate editorial pass. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> 2026-08-04 18:48:46 +02:00			`# Countable model: sweep the window absorption parameter W (w_u = W/f slots derived) at`
			`# U=1 against the Blend mixing delay. The window-miss contribution to non-recovery is`
			`# (1-f)^(W/f) ~ e^-W (theory.window_miss_prob): recovery should saturate within a few`
			`# expected block-intervals, with the residual set by the delay (orphans spread wider than`
			`# the window) and by the first-fork restriction. The countable counterpart of the old`
			`# model's uncle-window.yaml (which swept uncle_window in raw slots; run that with --old).`
			`# Latency is in SLOTS (1 slot = 1 s).`
			`n_nodes: [1000] # network size`
			`stake_dist: [pareto] # heavy-tailed (realistic) stake distribution`
			`topology: [blend] # Blend mixnet (delay stresses the window)`
			`degree: [6] # peering degree of the d-regular graph`
			`link_latency_mean: [0.5] # natural geographic transport (sub-slot)`
			`link_latency_dist: [geo] # real-world geographic band mixture`
			`blend_hops: [3] # fixed hop count; delay is the swept knob`
			`blend_delay_max: [8.0, 16.0, 32.0] # max per-relay mixing delay (slots)`
			`window_absorption: [1, 2, 3, 5, 7, 10] # W: window in expected block-intervals`
			`max_uncles: [1] # FIXED at one uncle (the question is about W)`
			`uncle_strategy: [oldest] # spec selection: oldest-first fill`
			`init_dest: [common] # per-node initial D_est from agreement`
			`replicates: 5 # independent RNG replicates per grid cell`
			`base: # per-run settings shared by every cell`
			`k: 2160 # true security parameter`
			`epochs: 20 # equilibrium within ~2 epochs; burn 50%`
			`f: 0.03333333333333333 # slot activation coefficient (1/30)`
			`genesis_d_factor: 0.5 # start near true stake (cheap epoch 0)`
			`early_stop: true`