The READMEs all share the standard install/overlay snippet, but the
sh blocks lacked the "<!-- $MDX skip -->" directive. `dune test`
would shell out to `opam install` against the live switch, which
either prompts interactively or fails with a package conflict —
either way diffing as a test failure.

Bulk-add skip directives in front of every install/overlay block.
Also collapse the doubled "non-deterministic + skip" stack on three
READMEs (memtrace, ocaml-dpop, ocaml-pid1, ocaml-yaml, merlint) where
`skip` already implies the runtime is bypassed.

38 subtrees lacked a (source ...) stanza in their dune-project, so
their generated .opam files had no dev-repo: field. That broke
downstream tooling that uses dev-repo to identify the subtree
(notably the root.opam external-dep filter, which couldn't tell
internal packages from external ones).

Add (source (tangled gazagnaire.org/<subtree>)) to each, matching
the URL configured in sources.toml. dune regenerates dev-repo:,
homepage: and bug-reports: in every affected .opam.

Pure formatting changes from `dune fmt`: doc comment placement moves
from above the binding to below it for `type`s, multi-line `match`
expressions collapse onto one line where they fit, and infix operator
applications pick up spaces (`Soup.($?)` -> `Soup.( $? )`). No
semantic changes.

Warning 69 (unused-field, mutable-never-assigned). Four independent
record fields were flagged as mutable but the code only mutates their
referents in place, never rebinds the record slot itself:

- ocaml-wal/lib/wal.ml: [t.file] (the Eio file resource; methods call
Eio.File.pwrite_all etc., the slot is set once at open time).
- ocaml-block/lib/block.ml: [Memory.state.data] (the backing bytes,
written via Bytes.blit_string; [Bytes.t] is already mutable).
- ocaml-sse/lib/sse.ml: [Parser.t.data_buf] (a Buffer.t, written via
Buffer.add_*; the slot never changes).
- ocaml-zephyr/lib/zephyr.ml: drop [mode : Read | Write] entirely —
set at open-time, read nowhere. The open_read / open_write
constructors already distinguish the two call shapes, so mode
tracking was redundant.

Previously the eight git-x subcommands sat flat at top level (split,
check, fix, verify, filter-paths, split-commit, drop-commit, reword),
with 'split' ambiguous between the subtree split and the per-directory
commit split.

Regrouped into two namespaces that mirror the object they act on:

git-x tree
split (was: git-x split)
add (new — inject a standalone history under a prefix)
drop (was: git-x filter-paths)
check (was: git-x check)
fix (was: git-x fix)
verify (was: git-x verify)

git-x commit
split (was: git-x split-commit)
drop (was: git-x drop-commit)
reword (was: git-x reword)

Each subcommand lives in cmd_<group>_<verb>.{ml,mli}; cmd_tree.ml and
cmd_commit.ml are the Cmd.group wrappers. git_x.ml registers just the
two groups.

'tree add' is a thin wrapper over Git.Subtree.add, which already
existed in the library but had no CLI exposure. It accepts a ref (e.g.
FETCH_HEAD after 'git fetch URL REF') and a --prefix, then builds a
subtree-merge commit with the current user's git config identity.

Log source names are updated to match (git-x.tree.split,
git-x.tree.fix). The cram test under test/cram/tree_split.t is
updated to use the new 'git-x tree split' invocation throughout.

Moves package metadata into dune-project for kdf, monopam-info,
ocaml-ax25, ocaml-collision, ocaml-crypto (4 subpackages), ocaml-csv,
ocaml-respond, ocaml-sdnv, ocaml-tls (2 subpackages), ocaml-vec3, and
ocaml-x509, and flags each .opam with the generated-by-dune header.

Running dune build after the ocaml-toml build break is resolved will
regenerate the .opam files from dune-project and reveal any
canonical-form drift in a separate commit.

Drops the "t" suffix and follows the value/codec/toml/core pattern
(jsont.json_base style). The internal raw TOML module moves from
[Toml] to [Value] (file: lib/value.ml, was lib/toml.ml) to make room
for the top-level Toml facade (file: lib/toml.ml, was lib/tomlt.ml).

External callers now reach the raw AST through [Toml.Value.X] instead
of [Tomlt.Toml.X]. Every downstream reference updated in lockstep.

Adds the missing test/ directory with a small alcotest suite covering
zero, add, sub, scale, dot, cross, length, normalize, negate, distance,
equal, and pp.

Generate .opam.template files with x-quality-* fields based on
detected package features:
- x-quality-build: has lib/ with .ml files
- x-quality-test: has test/ with .ml files
- x-quality-fuzz: has fuzz/ with .ml files
- x-quality-interop: has test/interop/ directory
- x-quality-cram: has test/*.t/ directories

These fields are picked up by dune's opam generation and will be
checked by merlint E910 for consistency.

Also: add fmt dep to ocaml-sse/lib/dune (Fmt.pf used without dep).

- Add missing .ocamlformat to 4 packages (E500)
- stix: use Fmt.failwith instead of failwith (Fmt.str ...) (E700)
- mbr: rename _unused1/_unused2 fields — underscore prefix implies
unused but they're stored in the record (E726)

- Update .ocamlformat to 0.29.0 across all 591 files
- csvt: reuse single Buffer.t for field reads (no alloc per field)
- sexpt: Obj members decoded from stream into Dict, typed Variant GADT
- Reformat all source files for 0.29.0

New READMEs for: ocaml-auth, ocaml-cose, ocaml-http, ocaml-osv,
ocaml-rego, ocaml-scitt, ocaml-sigstore, ocaml-vec3.

Expanded: ca-certs (7→40 lines), osrelease (8→45 lines).

Each includes: synopsis, installation, usage example, API overview,
and license. Skipped ocaml-cel and ocaml-chor (no code yet).

Resolve E400 (missing documentation), E410 (bad doc style), E615
(missing test suite), and E616 (use failf) across the monorepo.
Also fix test_timing to reference Requests.Timing instead of
non-existent Http.Timing.