SN21 — Transition plan (weekly → daily)
| Version | 1.3 |
| Audience | Miners |
| Status | Authoritative for cutover dates and bridge rules |
| Last updated | 2026-08-04 |
| Update independently of | SN21_SCORING.md · SN21_REWARDS.md · SN21_STAKING.md |
This document is the cutover schedule from the last weekly epoch to the daily prediction stream. Steady-state scoring and rewards are in the companion docs; this file is only about what happens when.
Daily wall clock: miner submissions use a midnight EST cut-off each day (same clock as the daily basket / prediction-lock cycle). See miner_quickstart.md §3 and MINER_MODEL_SPEC.md.
Where we are
| Fact | Detail |
|---|---|
| Last weekly epoch concluded | Sunday 2 August 2026 |
| Last weekly scored | Monday 3 August 2026 |
| Weekly payout window | Monday 3 August noon EST → midnight EST Sunday 9 August 2026 |
| Daily stream starts | Tuesday 4 August 2026 — the day the first live basket was delivered |
Two dates, and they are different. A basket is named for the day whose
changes it contains, and it is delivered the next morning. The first live
basket isBD-2026-08-03: it covers Monday 3 August and was delivered on
Tuesday 4 August. Every basket follows that pattern —BD-<date>always
means "the changes that happened on<date>", delivered the morning after.
Scoring clocks run from the basket's own date, which is why the first 7-day
scores land on 18 August (3 Aug + 1 + 7 + 7).
After the bridge period, emissions follow SN21_REWARDS.md. Stake rules: SN21_STAKING.md.
Master timeline
All dates 2026. Times in EST where stated.
Alpha = minimum hold that day (SN21_STAKING.md).
Burn = planned share of miner emissions burned (not paid to miners) — indicative only (see note below).
Burn rates — planned and indicative only
Burn percentages in this document are a working plan, not a guarantee.
Bittensor’s emissions-allocation methodology is changing significantly. SN21 may adjust burn at any time — up or down, on or off the dates below — in order to protect and grow alpha value for all holders. When a burn change is made, it will be announced through the usual miner channels as soon as practical; miners should not model returns as if the table below were fixed.
| Date | What happens | Burn (indicative) | Alpha |
|---|---|---|---|
| Sun 2 Aug | Last weekly epoch concludes. | — | 0 |
| Mon 3 Aug | Last weekly epoch scored. | 45% | 0 |
| Mon 3 Aug noon EST → Sun 9 Aug midnight EST | Emissions paid as normal from that weekly score. | 45% | 0 |
| Tue 4–5 Aug | Training bundle published — settled weekly-era episodes with full 7/14/28-day outcomes (same input schema as the daily stream; a like-for-like daily bundle cannot exist until the first 28-day daily outcomes settle on 8 Sep). Fetch: SN21_training_bundle.jsonl — 3,069 episodes, on the releases page. |
45% | 0 |
| Tue 4 Aug | First live daily basket delivered — BD-2026-08-03, covering Monday 3 August. |
45% | 0 |
| Mon 10 Aug | Bridge starts: weekly score still drives weights, but only bridge-eligible miners are paid (see below). | 30% | 150 |
| Tue 18 Aug | First daily 7-day settled scores begin feeding payouts. | 30% | 300 |
| Tue 25 Aug | First daily 14-day settled scores begin feeding payouts. | 15% | 450 |
| Tue 8 Sep | First daily 28-day (35-day settled) scores begin feeding payouts. | 15% | 700 |
| Tue 15 Sep | Terminal alpha hold in force; burn steps to target. Steady-state daily stream. | 0% | 1,000 |
Same timeline — stake ramp only
| Effective from | Minimum alpha hold |
|---|---|
| Through 9 Aug | 0 |
| 10 Aug | 150 |
| 18 Aug | 300 |
| 25 Aug | 450 |
| 8 Sep | 700 |
| 15 Sep onward | 1,000 |
Same timeline — burn only (indicative)
| From | Planned burn (indicative) |
|---|---|
| 3 Aug → 9 Aug (weekly payout window) | 45% |
| 10 Aug → 24 Aug | 30% |
| 25 Aug → 14 Sep | 15% |
| 15 Sep onward | 0% |
These figures may change without waiting for the next four-weekly parameter review if needed to protect alpha.
Same timeline — when daily horizons first pay
| Horizon | First payout date |
|---|---|
| 7-day | Tue 18 Aug |
| 14-day | Tue 25 Aug |
| 28-day (35 settled) | Tue 8 Sep |
Emissions while horizons are still ramping in — full pool, thinner signal
Qualifying miners are not paid a reduced share of emissions just because only 7-day (or only 7+14-day) rows have settled yet.
- After the indicative burn, 100% of the miner emission pool still flows through current weights (bridge, then the daily curve) to eligible miners.
- Horizons are not separate emission pots. We do not “give 100% to 7-day, then resplit when 14-day arrives.”
- What ramps is evidence in your standing: each settled (episode × horizon) enters at its published blend weight (see SN21_SCORING.md). Early on you have fewer rows, so standings are thinner / noisier — but the pie paid to the earning set is still the full post-burn miner pool.
- When 14-day and 28-day rows land, they add to standings; they do not unlock a larger emission budget by themselves.
You can still earn zero if you fail bridge eligibility, miss the alpha hold, or (once on the curve) fall outside the earning set — that is eligibility, not a horizon-based haircut on the pool.
Bridge eligibility (from Monday 10 August)
From Monday 10 August, carried-over weekly weights are paid only to miners who meet both of the following.
1. Submitted (participating on the daily stream)
Days follow the midnight EST wall clock. A miner submitted on a day if, when the subnet ran a live daily basket that day:
- they delivered valid predictions for at least 75% of the episodes in that day’s basket
(predictions_out / episodes_in ≥ 0.75), and - delivery means usable prediction payloads, not merely “the container exited 0”.
Not counted against you:
- Days the subnet did not ship a basket (operator / infrastructure outage) — subnet-down, not a miner miss.
- Days with an empty basket (nothing to predict).
Miss decay on the bridge:
| Consecutive missed live days (ignoring subnet-down) | Bridge weight multiplier |
|---|---|
| 0 | 100% |
| 1 | 50% |
| 2 | 25% |
| 3+ | 0% |
Only consecutive misses at the end of the window matter: miss Monday, submit every day since → you are participating again.
“Submitted some scores” (bridge): at least one submitted live day under the rule above, and consecutive-miss streak below the zero threshold.
2. Hold criteria (alpha stake)
Hold at least the alpha required that day (table above).
Fail the hold → not paid, even if you submitted.
What miners should do
| When | Action |
|---|---|
| From 4 Aug | Use the training bundle; run against live daily baskets. |
| Before 10 Aug | Be ready to submit every live day; hold ≥150 alpha. |
| Through 15 Sep | Follow the stake ramp; expect 7d → 14d → 28d settlements on the dates in the master table. |
Scoring & rewards: SN21_SCORING.md · SN21_REWARDS.md.
What ends / what stays
Ends: weekly mining windows after the 3–9 Aug payout window; weekly tier/EMA as the primary allocator; dust to inactive UIDs that never participate or never meet the hold.
Stays: sealed predictions before outcomes; reproducible scores; published scoring components; announced parameter changes (four-weekly reviews in steady state).