Docs: label unreleased sources as the v0.2.6-dev plan

main keeps its name; the 17 sources with release: None are presented as the
planned contents of v0.2.6 in the README and CHANGELOG. No tag, no registry
change.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -2,7 +2,9 @@
 
 ## Unreleased (on main)
 
-Sources on main that no release admits yet (`release: None` in
+### v0.2.6-dev plan
+
+Sources planned for v0.2.6: on main, but no release admits them yet (`release: None` in
 `src/sources.py`). None has a recorded NERGAL pass, which is required before a
 release can admit it. Together: 17 sources, 1,331,877 documents /
 1,262,417,311 cl100k-proxy tokens.

README.md

@@ -25,7 +25,7 @@ family (Enevoldsen et al., [arXiv:2508.02271](https://arxiv.org/abs/2508.02271))
 
 > **main, not a release (2026-09-29)** · 36 sources · 4,094,255 documents ·
 > **8.38B tokens**: 19 of the 20 v0.2.5 sources (`european_hplt_v3_pl` withdrawn)
-> plus 17 [sources not yet released](#sources-on-main-not-yet-released). Cite
+> plus the 17 sources [planned for v0.2.6](#v026-dev-planned-sources-on-main-not-yet-released). Cite
 > the `v0.2.5` tag, not main.
 
 > **v0.3-dev experimental track** · quality/diversity workflow, source-gate
@@ -220,10 +220,10 @@ Main has changed since:
 
 The 19 v0.2.5 sources still on main total 2,762,378 documents / 7,119.8M tokens.
 
-## Sources on main, not yet released
-Built and documented, but **not** part of v0.2.5 and excluded from every total
+## v0.2.6-dev: planned sources (on main, not yet released)
+The planned content of v0.2.6. Built and documented, but **not** part of v0.2.5 and excluded from every total
 above. None has a recorded [NERGAL](https://huggingface.co/SlayerLab/NERGAL)
-pass yet, which a source needs before a release can admit it (see `AGENTS.md`).
+pass yet, which each needs before v0.2.6 can admit it (see `AGENTS.md`).
 `common_voice_pl` documents are single validated sentences (at most 153
 characters, below the 200-character document gate); whether sentence-level
 units are accepted is an open maintainer decision (see its datasheet).
@@ -247,7 +247,7 @@ units are accepted is an open maintainer decision (see its datasheet).
 | [edukacja_medialna_pl](data/edukacja_medialna_pl/edukacja_medialna_pl.md) | Edukacja Medialna - Polish media-literacy lessons | `CC-BY-SA-3.0` | 252 | 0.7M |
 | [open_agh_chemistry_pl](data/open_agh_chemistry_pl/open_agh_chemistry_pl.md) | Open AGH - four Polish chemistry textbooks | `CC-BY-SA-4.0` | 370 | 0.6M |
 | [kultura_bez_barier_pl](data/kultura_bez_barier_pl/kultura_bez_barier_pl.md) | Kultura bez Barier PL (accessibility guides) | `CC-BY-SA-3.0` | 9 | 0.2M |
-| **total (not released)** | | | **1,331,877** | **1,262.4M** |
+| **total (planned for v0.2.6)** | | | **1,331,877** | **1,262.4M** |
 
 ## Method
 Only **human-authored** text — no synthetic, machine-translated, or auto-transcribed