diff --git a/doc/manual/rl-next/c-api.md b/doc/manual/rl-next/c-api.md
deleted file mode 100644
index 3b2abfda5..000000000
--- a/doc/manual/rl-next/c-api.md
+++ /dev/null
@@ -1,19 +0,0 @@
----
-synopsis: "C API: functions for locking and loading a flake"
-issues: 10435
-prs: [12877, 13098]
----
-
-This release adds functions to the C API for handling the loading of flakes. Previously, this had to be worked around by using `builtins.getFlake`.
-C API consumers and language bindings now have access to basic locking functionality.
-
-It does not expose the full locking API, so that the implementation can evolve more freely.
-Locking is controlled with the functions, which cover the common use cases for consuming a flake:
-- `nix_flake_lock_flags_set_mode_check`
-- `nix_flake_lock_flags_set_mode_virtual`
-- `nix_flake_lock_flags_set_mode_write_as_needed`
-- `nix_flake_lock_flags_add_input_override`, which also enables `virtual`
-
-This change also introduces the new `nix-fetchers-c` library, whose single purpose for now is to manage the (`nix.conf`) settings for the built-in fetchers.
-
-More details can be found in the [C API documentation](@docroot@/c-api.md).
diff --git a/doc/manual/rl-next/duplicate-copy.md b/doc/manual/rl-next/duplicate-copy.md
deleted file mode 100644
index 884d8d8e1..000000000
--- a/doc/manual/rl-next/duplicate-copy.md
+++ /dev/null
@@ -1,8 +0,0 @@
----
-synopsis: "No longer copy flakes that are in the nix store"
-issues: 10435
-prs: [12877, 13098]
----
-
-Previously, we would duplicate entries like `path:/nix/store/*` back into the Nix store.
-This was prominently visible for pinned system flake registry entries in NixOS, e.g., when running `nix run nixpkgs#hello`.
diff --git a/doc/manual/rl-next/eval-cache-errors.md b/doc/manual/rl-next/eval-cache-errors.md
deleted file mode 100644
index 8e20512d2..000000000
--- a/doc/manual/rl-next/eval-cache-errors.md
+++ /dev/null
@@ -1,9 +0,0 @@
----
-synopsis: "Consistently preserve error messages from cached evaluation"
-issues: [12762]
-prs: [12809]
----
-
-In one code path, we are not returning the errors cached from prior evaluation, but instead throwing generic errors stemming from the lack of value (due to the error).
-These generic error messages were far less informative.
-Now we consistently return the original error message.
diff --git a/doc/manual/rl-next/faster-blake3.md b/doc/manual/rl-next/faster-blake3.md
deleted file mode 100644
index be6f80bae..000000000
--- a/doc/manual/rl-next/faster-blake3.md
+++ /dev/null
@@ -1,8 +0,0 @@
----
-synopsis: "Faster blake3 hashing"
-issues:
-prs: [12676]
----
-
-The implementation for blake3 hashing is now multi-threaded and used memory-mapped IO.
-Benchmark results can be found the [pull request](https://github.com/NixOS/nix/pull/12676).
diff --git a/doc/manual/rl-next/fixed-s3-progress-bar.md b/doc/manual/rl-next/fixed-s3-progress-bar.md
deleted file mode 100644
index cb29151a2..000000000
--- a/doc/manual/rl-next/fixed-s3-progress-bar.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-synopsis: "Fix progress bar for S3 binary caches and make file transfers interruptible"
-issues: [12877, 13098]
-prs: [12538]
----
-
-The progress bar now correctly display upload/download progress for S3 up/downloads. S3 uploads are now interruptible.
diff --git a/doc/manual/rl-next/github-host-attr.md b/doc/manual/rl-next/github-host-attr.md
deleted file mode 100644
index 330f00074..000000000
--- a/doc/manual/rl-next/github-host-attr.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-synopsis: "Add host attribute of github/gitlab flakerefs to URL serialization"
-issues:
-prs: [12580]
----
-
-Resolved an issue where `github:` or `gitlab:` URLs lost their `host` attribute when written to a lockfile, resulting in invalid URLs.
diff --git a/doc/manual/rl-next/multiple-signatures.md b/doc/manual/rl-next/multiple-signatures.md
deleted file mode 100644
index 4493f4262..000000000
--- a/doc/manual/rl-next/multiple-signatures.md
+++ /dev/null
@@ -1,15 +0,0 @@
----
-synopsis: "Multiple signatures support in store urls"
-issues:
-prs: [12976]
----
-
-Added support for a `secretKeyFiles` URI parameter in Nix store URIs, allowing multiple signing key files to be specified as a comma-separated list.
-This enables signing paths with multiple keys. This helps with [RFC #149](https://github.com/NixOS/rfcs/pull/149) to enable binary cache key rotation in the NixOS infra.
-
-Example usage:
-
-```bash
-nix copy --to "file:///tmp/store?secret-keys=/tmp/key1,/tmp/key2" \
-  "$(nix build --print-out-paths nixpkgs#hello)"
-```
diff --git a/doc/manual/rl-next/nix-flake-show.md b/doc/manual/rl-next/nix-flake-show.md
deleted file mode 100644
index 70f96f10f..000000000
--- a/doc/manual/rl-next/nix-flake-show.md
+++ /dev/null
@@ -1,8 +0,0 @@
----
-synopsis: "nix flake show now skips over import-from-derivation"
-issues: 4265
-prs: [12583]
----
-
-Previously, if a flake contained outputs relying on [import from derivation](@docroot@/language/import-from-derivation.md) during evaluation, `nix flake show` would fail to display the rest of the flake. The updated behavior skips such outputs, allowing the rest of the flake to be shown.
-
diff --git a/doc/manual/rl-next/nix-formatter.md b/doc/manual/rl-next/nix-formatter.md
deleted file mode 100644
index 56bdd7c19..000000000
--- a/doc/manual/rl-next/nix-formatter.md
+++ /dev/null
@@ -1,16 +0,0 @@
----
-synopsis: "Add `nix formatter build` and `nix formatter run` commands"
-issues:
-prs: [13063]
----
-
-`nix formatter run` is an alias for `nix fmt`. Nothing new there.
-
-`nix formatter build` is sort of like `nix build`: it builds, links, and prints a path to the formatter program:
-
-```
-$ nix formatter build
-/nix/store/cb9w44vkhk2x4adfxwgdkkf5gjmm856j-treefmt/bin/treefmt
-```
-
-Note that unlike `nix build`, this prints the full path to the program, not just the store path (in the example above that would be `/nix/store/cb9w44vkhk2x4adfxwgdkkf5gjmm856j-treefmt`).
diff --git a/doc/manual/rl-next/osc-8-xterm-style-fix.md b/doc/manual/rl-next/osc-8-xterm-style-fix.md
deleted file mode 100644
index 335d7850b..000000000
--- a/doc/manual/rl-next/osc-8-xterm-style-fix.md
+++ /dev/null
@@ -1,8 +0,0 @@
----
-synopsis: "Amend OSC 8 escape stripping for xterm-style separator"
-issues:
-prs: [13109]
----
-
-Improve terminal escape code filtering to understand a second type of hyperlink escape codes.
-This in particular prevents parts of GCC 14's diagnostics from being improperly filtered away.
diff --git a/doc/manual/rl-next/pretty-json.md b/doc/manual/rl-next/pretty-json.md
deleted file mode 100644
index 98c0155d1..000000000
--- a/doc/manual/rl-next/pretty-json.md
+++ /dev/null
@@ -1,12 +0,0 @@
----
-synopsis: "Prettified JSON output on the terminal"
-issues: 12555
-prs: [12652]
----
-
-This makes the output easier to read.
-
-Scripts are mostly unaffected because for those, stdout will be a file or a pipe, not a terminal, and for those, the old single-line behavior applies.
-
-`--json --pretty` can be passed to enable it even if the output is not a terminal.
-If your script creates a pseudoterminal for Nix's stdout, you can pass `--no-pretty` to disable the new behavior.
diff --git a/doc/manual/rl-next/repl-continuation.md b/doc/manual/rl-next/repl-continuation.md
deleted file mode 100644
index 2d9fd43c0..000000000
--- a/doc/manual/rl-next/repl-continuation.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-synopsis: "Repl: improve continuation prompt for incomplete expressions"
-issues:
-prs: [12846]
----
-
-Improved REPL user experience by updating the continuation prompt from invisible blank spaces to a visible `" > "`, enhancing clarity when entering multi-line expressions.
diff --git a/doc/manual/rl-next/repl-reload-flakes.md b/doc/manual/rl-next/repl-reload-flakes.md
deleted file mode 100644
index c4ffc8bac..000000000
--- a/doc/manual/rl-next/repl-reload-flakes.md
+++ /dev/null
@@ -1,9 +0,0 @@
----
-synopsis: "REPL `:load-flake` and `:reload` now work together"
-issues: [8753]
-prs: [13180]
----
-
-Previously, `:reload` only reloaded the files specified with `:load` (or on the command line).
-Now, it also works with the flakes specified with `:load-flake` (or on the command line).
-This makes it correctly reload everything that was previously loaded, regardless of what sort of thing (plain file or flake) each item is.
diff --git a/doc/manual/rl-next/retry-on-http-429.md b/doc/manual/rl-next/retry-on-http-429.md
deleted file mode 100644
index c5872356e..000000000
--- a/doc/manual/rl-next/retry-on-http-429.md
+++ /dev/null
@@ -1,8 +0,0 @@
----
-synopsis: "Increase retry delays on HTTP 429 Too Many Requests"
-issues:
-prs: [13052]
----
-
-When downloading Nix, the retry delay was previously set to 0.25 seconds. It has now been increased to 1 minute to better handle transient CI errors, particularly on GitHub.
-
diff --git a/doc/manual/rl-next/s3-sts-authentication.md b/doc/manual/rl-next/s3-sts-authentication.md
deleted file mode 100644
index 470202b16..000000000
--- a/doc/manual/rl-next/s3-sts-authentication.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-synopsis: "S3: opt-in the STSProfileCredentialsProvider"
-issues:
-prs: [12646]
----
-
-Added support for STS-based authentication for S3-based binary caches, i.e. enabling seamless integration with `aws sso login`.
diff --git a/doc/manual/rl-next/substituter-timeout.md b/doc/manual/rl-next/substituter-timeout.md
deleted file mode 100644
index 78f59590b..000000000
--- a/doc/manual/rl-next/substituter-timeout.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-synopsis: "Reduce connect timeout for http substituter"
-issues:
-prs: [12876]
----
-
-Previously, the Nix setting `connect-timeout` had no limit. It is now set to `5s`, offering a more practical default for users self-hosting binary caches, which may occasionally become unavailable, such as during updates.
diff --git a/doc/manual/source/SUMMARY.md.in b/doc/manual/source/SUMMARY.md.in
index 140be98ad..6711bd4be 100644
--- a/doc/manual/source/SUMMARY.md.in
+++ b/doc/manual/source/SUMMARY.md.in
@@ -136,6 +136,7 @@
   - [Contributing](development/contributing.md)
 - [Releases](release-notes/index.md)
 {{#include ./SUMMARY-rl-next.md}}
+  - [Release 2.29 (2025-05-14)](release-notes/rl-2.29.md)
   - [Release 2.28 (2025-04-02)](release-notes/rl-2.28.md)
   - [Release 2.27 (2025-03-03)](release-notes/rl-2.27.md)
   - [Release 2.26 (2025-01-22)](release-notes/rl-2.26.md)
diff --git a/doc/manual/source/release-notes/rl-2.29.md b/doc/manual/source/release-notes/rl-2.29.md
new file mode 100644
index 000000000..c74f1ad5d
--- /dev/null
+++ b/doc/manual/source/release-notes/rl-2.29.md
@@ -0,0 +1,155 @@
+# Release 2.29.0 (2025-05-14)
+
+- C API: functions for locking and loading a flake [#10435](https://github.com/NixOS/nix/issues/10435) [#12877](https://github.com/NixOS/nix/pull/12877) [#13098](https://github.com/NixOS/nix/pull/13098)
+
+  This release adds functions to the C API for handling the loading of flakes. Previously, this had to be worked around by using `builtins.getFlake`.
+  C API consumers and language bindings now have access to basic locking functionality.
+
+  It does not expose the full locking API, so that the implementation can evolve more freely.
+  Locking is controlled with the functions, which cover the common use cases for consuming a flake:
+  - `nix_flake_lock_flags_set_mode_check`
+  - `nix_flake_lock_flags_set_mode_virtual`
+  - `nix_flake_lock_flags_set_mode_write_as_needed`
+  - `nix_flake_lock_flags_add_input_override`, which also enables `virtual`
+
+  This change also introduces the new `nix-fetchers-c` library, whose single purpose for now is to manage the (`nix.conf`) settings for the built-in fetchers.
+
+  More details can be found in the [C API documentation](@docroot@/c-api.md).
+
+- No longer copy flakes that are in the nix store [#10435](https://github.com/NixOS/nix/issues/10435) [#12877](https://github.com/NixOS/nix/pull/12877) [#13098](https://github.com/NixOS/nix/pull/13098)
+
+  Previously, we would duplicate entries like `path:/nix/store/*` back into the Nix store.
+  This was prominently visible for pinned system flake registry entries in NixOS, e.g., when running `nix run nixpkgs#hello`.
+
+- Consistently preserve error messages from cached evaluation [#12762](https://github.com/NixOS/nix/issues/12762) [#12809](https://github.com/NixOS/nix/pull/12809)
+
+  In one code path, we are not returning the errors cached from prior evaluation, but instead throwing generic errors stemming from the lack of value (due to the error).
+  These generic error messages were far less informative.
+  Now we consistently return the original error message.
+
+- Faster blake3 hashing [#12676](https://github.com/NixOS/nix/pull/12676)
+
+  The implementation for blake3 hashing is now multi-threaded and used memory-mapped IO.
+  Benchmark results can be found the [pull request](https://github.com/NixOS/nix/pull/12676).
+
+- Fix progress bar for S3 binary caches and make file transfers interruptible [#12877](https://github.com/NixOS/nix/issues/12877) [#13098](https://github.com/NixOS/nix/issues/13098) [#12538](https://github.com/NixOS/nix/pull/12538)
+
+  The progress bar now correctly display upload/download progress for S3 up/downloads. S3 uploads are now interruptible.
+
+- Add host attribute of github/gitlab flakerefs to URL serialization [#12580](https://github.com/NixOS/nix/pull/12580)
+
+  Resolved an issue where `github:` or `gitlab:` URLs lost their `host` attribute when written to a lockfile, resulting in invalid URLs.
+
+- Multiple signatures support in store urls [#12976](https://github.com/NixOS/nix/pull/12976)
+
+  Added support for a `secretKeyFiles` URI parameter in Nix store URIs, allowing multiple signing key files to be specified as a comma-separated list.
+  This enables signing paths with multiple keys. This helps with [RFC #149](https://github.com/NixOS/rfcs/pull/149) to enable binary cache key rotation in the NixOS infra.
+
+  Example usage:
+
+  ```bash
+  nix copy --to "file:///tmp/store?secret-keys=/tmp/key1,/tmp/key2" \
+    "$(nix build --print-out-paths nixpkgs#hello)"
+  ```
+
+- nix flake show now skips over import-from-derivation [#4265](https://github.com/NixOS/nix/issues/4265) [#12583](https://github.com/NixOS/nix/pull/12583)
+
+  Previously, if a flake contained outputs relying on [import from derivation](@docroot@/language/import-from-derivation.md) during evaluation, `nix flake show` would fail to display the rest of the flake. The updated behavior skips such outputs, allowing the rest of the flake to be shown.
+
+- Add `nix formatter build` and `nix formatter run` commands [#13063](https://github.com/NixOS/nix/pull/13063)
+
+  `nix formatter run` is an alias for `nix fmt`. Nothing new there.
+
+  `nix formatter build` is sort of like `nix build`: it builds, links, and prints a path to the formatter program:
+
+  ```
+  $ nix formatter build
+  /nix/store/cb9w44vkhk2x4adfxwgdkkf5gjmm856j-treefmt/bin/treefmt
+  ```
+
+  Note that unlike `nix build`, this prints the full path to the program, not just the store path (in the example above that would be `/nix/store/cb9w44vkhk2x4adfxwgdkkf5gjmm856j-treefmt`).
+
+- Amend OSC 8 escape stripping for xterm-style separator [#13109](https://github.com/NixOS/nix/pull/13109)
+
+  Improve terminal escape code filtering to understand a second type of hyperlink escape codes.
+  This in particular prevents parts of GCC 14's diagnostics from being improperly filtered away.
+
+- Prettified JSON output on the terminal [#12555](https://github.com/NixOS/nix/issues/12555) [#12652](https://github.com/NixOS/nix/pull/12652)
+
+  This makes the output easier to read.
+
+  Scripts are mostly unaffected because for those, stdout will be a file or a pipe, not a terminal, and for those, the old single-line behavior applies.
+
+  `--json --pretty` can be passed to enable it even if the output is not a terminal.
+  If your script creates a pseudoterminal for Nix's stdout, you can pass `--no-pretty` to disable the new behavior.
+
+- Repl: improve continuation prompt for incomplete expressions [#12846](https://github.com/NixOS/nix/pull/12846)
+
+  Improved REPL user experience by updating the continuation prompt from invisible blank spaces to a visible `" > "`, enhancing clarity when entering multi-line expressions.
+
+- REPL `:load-flake` and `:reload` now work together [#8753](https://github.com/NixOS/nix/issues/8753) [#13180](https://github.com/NixOS/nix/pull/13180)
+
+  Previously, `:reload` only reloaded the files specified with `:load` (or on the command line).
+  Now, it also works with the flakes specified with `:load-flake` (or on the command line).
+  This makes it correctly reload everything that was previously loaded, regardless of what sort of thing (plain file or flake) each item is.
+
+- Increase retry delays on HTTP 429 Too Many Requests [#13052](https://github.com/NixOS/nix/pull/13052)
+
+  When downloading Nix, the retry delay was previously set to 0.25 seconds. It has now been increased to 1 minute to better handle transient CI errors, particularly on GitHub.
+
+- S3: opt-in the STSProfileCredentialsProvider [#12646](https://github.com/NixOS/nix/pull/12646)
+
+  Added support for STS-based authentication for S3-based binary caches, i.e. enabling seamless integration with `aws sso login`.
+
+- Reduce connect timeout for http substituter [#12876](https://github.com/NixOS/nix/pull/12876)
+
+  Previously, the Nix setting `connect-timeout` had no limit. It is now set to `5s`, offering a more practical default for users self-hosting binary caches, which may occasionally become unavailable, such as during updates.
+
+
+# Contributors
+
+
+This release was made possible by the following 40 contributors:
+
+- Farid Zakaria [**(@fzakaria)**](https://github.com/fzakaria)
+- The Tumultuous Unicorn Of Darkness [**(@TheTumultuousUnicornOfDarkness)**](https://github.com/TheTumultuousUnicornOfDarkness)
+- Robert Hensing [**(@roberth)**](https://github.com/roberth)
+- Félix [**(@picnoir)**](https://github.com/picnoir)
+- Valentin Gagarin [**(@fricklerhandwerk)**](https://github.com/fricklerhandwerk)
+- Eelco Dolstra [**(@edolstra)**](https://github.com/edolstra)
+- Vincent Breitmoser [**(@Valodim)**](https://github.com/Valodim)
+- Brian McKenna [**(@puffnfresh)**](https://github.com/puffnfresh)
+- ulucs [**(@ulucs)**](https://github.com/ulucs)
+- John Ericson [**(@Ericson2314)**](https://github.com/Ericson2314)
+- Andrey Butirsky [**(@bam80)**](https://github.com/bam80)
+- Dean De Leo [**(@whatsthecraic)**](https://github.com/whatsthecraic)
+- Las Safin [**(@L-as)**](https://github.com/L-as)
+- Sergei Zimmerman [**(@xokdvium)**](https://github.com/xokdvium)
+- Shahar "Dawn" Or [**(@mightyiam)**](https://github.com/mightyiam)
+- Ryan Hendrickson [**(@rhendric)**](https://github.com/rhendric)
+- Rodney Lorrimar [**(@rvl)**](https://github.com/rvl)
+- Erik Nygren [**(@Kirens)**](https://github.com/Kirens)
+- Cole Helbling [**(@cole-h)**](https://github.com/cole-h)
+- Martin Fischer [**(@not-my-profile)**](https://github.com/not-my-profile)
+- Graham Christensen [**(@grahamc)**](https://github.com/grahamc)
+- Vit Gottwald [**(@VitGottwald)**](https://github.com/VitGottwald)
+- silvanshade [**(@silvanshade)**](https://github.com/silvanshade)
+- Illia Bobyr [**(@ilya-bobyr)**](https://github.com/ilya-bobyr)
+- Jeremy Fleischman [**(@jfly)**](https://github.com/jfly)
+- Ruby Rose [**(@oldshensheep)**](https://github.com/oldshensheep)
+- Sergei Trofimovich [**(@trofi)**](https://github.com/trofi)
+- Tim [**(@Jaculabilis)**](https://github.com/Jaculabilis)
+- Anthony Wang [**(@anthowan)**](https://github.com/anthowan)
+- Jörg Thalheim [**(@Mic92)**](https://github.com/Mic92)
+- Sandro [**(@SuperSandro2000)**](https://github.com/SuperSandro2000)
+- tomberek [**(@tomberek)**](https://github.com/tomberek)
+- Dmitry Bogatov [**(@KAction)**](https://github.com/KAction)
+- Sizhe Zhao [**(@Prince213)**](https://github.com/Prince213)
+- jade [**(@lf-)**](https://github.com/lf-)
+- Pierre-Etienne Meunier [**(@P-E-Meunier)**](https://github.com/P-E-Meunier)
+- Alexander Romanov [**(@ajlekcahdp4)**](https://github.com/ajlekcahdp4)
+- Domagoj Mišković [**(@allrealmsoflife)**](https://github.com/allrealmsoflife)
+- Thomas Miedema [**(@thomie)**](https://github.com/thomie)
+- Yannik Sander [**(@ysndr)**](https://github.com/ysndr)
+- Philipp Otterbein
+- Dmitry Bogatov