diff --git a/.github/scripts/check_cli_flags.py b/.github/scripts/check_cli_flags.py
index af1c9bf..bf27964 100644
--- a/.github/scripts/check_cli_flags.py
+++ b/.github/scripts/check_cli_flags.py
@@ -38,7 +38,7 @@ def main() -> int:
     with open(help_path, encoding="utf-8") as f:
         help_text = f.read()
     if not flags:
-        print("::error::found no flags in to_argv; has src/options.rs moved?")
+        print("::error::found no flags in to_argv; has crates/ccwire/src/options.rs moved?")
         return 1
     missing = []
     for flag in flags:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 096e356..9521398 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -77,7 +77,7 @@ jobs:
         features:
           - { name: default, flags: "" }
           # `runtime` adds the framing's async half and the session tests
-          # over the fake CLI (tests/fake_claude).
+          # over the fake CLI (crates/ccwire/tests/fake_claude).
           - { name: all-features, flags: "--all-features" }
     steps:
       - uses: actions/checkout@v7
@@ -88,7 +88,7 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           key: ${{ matrix.features.name }}
-      # Includes tests/corpus.rs, the golden corpus test.
+      # Includes crates/ccwire/tests/corpus.rs, the golden corpus test.
       - run: cargo test --workspace --all-targets --locked ${{ matrix.features.flags }}
       - run: cargo test --workspace --doc --locked ${{ matrix.features.flags }}
 
@@ -101,13 +101,17 @@ jobs:
       - name: Read rust-version from Cargo.toml
         id: msrv
         run: |
-          if grep -Eq '^rust-version\.workspace|^rust-version *= *\{' Cargo.toml; then
-            echo "::error::Cargo.toml inherits rust-version from a workspace; this repo needs an explicit rust-version = \"x.y\""
-            exit 1
-          fi
+          # One MSRV, the root's [workspace.package] rust-version, which
+          # every crate inherits.
+          for manifest in crates/*/Cargo.toml; do
+            if ! grep -Eq '^rust-version\.workspace *= *true' "$manifest"; then
+              echo "::error::$manifest doesn't inherit rust-version (rust-version.workspace = true)"
+              exit 1
+            fi
+          done
           msrv=$(sed -n 's/^rust-version *= *"\(.*\)"/\1/p' Cargo.toml)
           if [ -z "$msrv" ]; then
-            echo "::error::no rust-version = \"...\" in Cargo.toml"
+            echo "::error::no rust-version = \"...\" in Cargo.toml's [workspace.package]"
             exit 1
           fi
           echo "MSRV: $msrv"
@@ -125,7 +129,7 @@ jobs:
         with:
           toolchain: ${{ steps.msrv.outputs.version }}
       - uses: Swatinem/rust-cache@v2
-      # Every crate in the workspace (they share the root's rust-version).
+      # Every crate in the workspace (they inherit the root's rust-version).
       - run: cargo +${{ steps.msrv.outputs.version }} build --workspace --all-features --locked
       - run: cargo +${{ steps.msrv.outputs.version }} build --workspace --locked
 
diff --git a/.github/workflows/newest-cli.yml b/.github/workflows/newest-cli.yml
index 2ed730f..6d188ad 100644
--- a/.github/workflows/newest-cli.yml
+++ b/.github/workflows/newest-cli.yml
@@ -43,10 +43,10 @@ jobs:
 
       - name: Compare the CLI version with TESTED_CLI_VERSION
         run: |
-          tested=$(sed -n 's/^pub const TESTED_CLI_VERSION: &str = "\(.*\)";/\1/p' src/lib.rs)
+          tested=$(sed -n 's/^pub const TESTED_CLI_VERSION: &str = "\(.*\)";/\1/p' crates/ccwire/src/lib.rs)
           newest=$(claude --version | awk '{print $1}')
           if [ -z "$tested" ]; then
-            echo "::error::no TESTED_CLI_VERSION in src/lib.rs"
+            echo "::error::no TESTED_CLI_VERSION in crates/ccwire/src/lib.rs"
             exit 1
           fi
           {
@@ -55,13 +55,13 @@ jobs:
             echo "- TESTED_CLI_VERSION: \`$tested\`"
           } >> "$GITHUB_STEP_SUMMARY"
           if [ "$newest" != "$tested" ]; then
-            echo "::warning::claude $newest differs from TESTED_CLI_VERSION $tested; re-record the corpus (tests/corpus)"
+            echo "::warning::claude $newest differs from TESTED_CLI_VERSION $tested; re-record the corpus (crates/ccwire/tests/corpus)"
           fi
 
       - name: Check that every to_argv flag is in claude --help
         run: |
           claude --help > "$RUNNER_TEMP/claude-help.txt"
-          python3 .github/scripts/check_cli_flags.py src/options.rs "$RUNNER_TEMP/claude-help.txt"
+          python3 .github/scripts/check_cli_flags.py crates/ccwire/src/options.rs "$RUNNER_TEMP/claude-help.txt"
 
       # Only with the secret: a skipped step costs nothing and needs no key.
       - name: Live turn (needs ANTHROPIC_API_KEY)
diff --git a/Cargo.toml b/Cargo.toml
index b4db871..9a4168d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,70 +1,43 @@
-[package]
-name = "ccwire"
-description = "A Rust SDK for Claude Code: the stream-json protocol, typed"
-version = "0.1.1"
+# ccwire: a Rust SDK for Claude Code. `ccwire` is the stream-json protocol
+# and session core, `ccwire-oauth` a client for the Claude account endpoints
+# an OAuth login can call. Each crate keeps its own version, README and
+# exclude list; the rest is shared here.
+[workspace]
+resolver = "3"
+members = ["crates/*"]
+
+[workspace.package]
 edition = "2024"
 license = "Apache-2.0"
-readme = "README.md"
 repository = "https://github.com/talaagent/ccwire"
-documentation = "https://docs.rs/ccwire"
 authors = ["Ian Macalinao <github@igm.pub>"]
+# The MSRV of every crate (CI's `msrv` job reads it from here).
 rust-version = "1.85"
-keywords = ["claude", "claude-code", "agent", "sdk"]
-categories = ["api-bindings"]
-# The golden corpus (and scrub.py, its tool) stays in the repo; its test
-# goes with it, as it include_str!s the corpus. So do the repo's CI, release
-# and Nix files.
-exclude = [
-    "tests/corpus",
-    "tests/corpus.rs",
-    ".github",
-    ".gitignore",
-    "clippy.toml",
-    "deny.toml",
-    "release-plz.toml",
-    "flake.nix",
-    "flake.lock",
-]
-
-[features]
-default = []
-# The async layers over tokio: the framing's async reader and writer, and
-# the session core. The `protocol` module and the sync framing never need it.
-runtime = ["dep:tokio"]
-# Logs every `Other` and `Malformed` frame (debug and warn, with its type),
-# besides counting them (`protocol::stats`, always on).
-tracing = ["dep:tracing"]
 
+# Each crate turns on the features it uses (`features = [...]` beside
+# `workspace = true`); the entries here only pin versions and turn default
+# features off where a crate wants them off.
+[workspace.dependencies]
+httpdate = "1"
+# reqwest's default TLS is rustls (aws-lc-rs provider, the platform's
+# roots); http2 for the API, no system proxy lookup, no cookies.
+reqwest = { version = "0.13", default-features = false, features = [
+    "rustls",
+    "http2",
+    "charset",
+] }
+serde = { version = "1", features = ["derive"] }
 # serde_json without `preserve_order` or `float_roundtrip`: frames compare
 # as `Value`s, so key order and the last float digit don't matter.
-[dependencies]
-serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 thiserror = "2"
-# Only what the session core uses: async I/O traits and buffering (io-util),
-# its channels (sync) and its reader/writer tasks (rt).
-tokio = { version = "1", default-features = false, features = [
-    "io-util",
-    "sync",
-    "rt",
-], optional = true }
-tracing = { version = "0.1", default-features = false, features = [
-    "std",
-], optional = true }
-
-[dev-dependencies]
-# The tests' runtimes (current-thread and multi-thread) and their hang
-# guard.
-tokio = { version = "1", default-features = false, features = [
-    "io-util",
-    "sync",
-    "rt",
-    "rt-multi-thread",
-    "macros",
-    "time",
-] }
+tokio = { version = "1", default-features = false }
+tracing = { version = "0.1", default-features = false, features = ["std"] }
+url = "2"
+wiremock = "0.6"
+zeroize = "1"
 
-[lints.clippy]
+[workspace.lints.clippy]
 pedantic = { level = "warn", priority = -1 }
 complexity = { level = "deny", priority = -1 }
 must_use_candidate = "allow"
@@ -83,7 +56,3 @@ await_holding_lock = "deny"
 disallowed_methods = "deny"
 disallowed_types = "deny"
 large_futures = "allow"
-
-# ccwire is the root package; the rest of the repo's crates are members.
-[workspace]
-members = ["ccwire-oauth"]
diff --git a/README.md b/README.md
index 8b1f674..c5ce776 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ Until the first crates.io release, use the git repository:
 ccwire = { git = "https://github.com/talaagent/ccwire", features = ["runtime"] }
 ```
 
-The workspace also has [`ccwire-oauth`](https://github.com/talaagent/ccwire/tree/main/ccwire-oauth), a typed client for
+The workspace also has [`ccwire-oauth`](https://github.com/talaagent/ccwire/tree/main/crates/ccwire-oauth), a typed client for
 the Claude account endpoints an OAuth login can call.
 
 ## `ccwire::protocol`
diff --git a/ccwire-oauth/Cargo.toml b/ccwire-oauth/Cargo.toml
deleted file mode 100644
index 5eb0249..0000000
--- a/ccwire-oauth/Cargo.toml
+++ /dev/null
@@ -1,61 +0,0 @@
-[package]
-name = "ccwire-oauth"
-description = "A typed async client for the Claude account endpoints an OAuth login can call"
-version = "0.1.0"
-edition = "2024"
-license = "Apache-2.0"
-readme = "README.md"
-repository = "https://github.com/talaagent/ccwire"
-documentation = "https://docs.rs/ccwire-oauth"
-authors = ["Ian Macalinao <github@igm.pub>"]
-rust-version = "1.85"
-keywords = ["claude", "oauth", "usage", "api-client"]
-categories = ["api-bindings"]
-# The recorded fixtures stay in the repo; the tests that include_str! them
-# go with them.
-exclude = ["tests"]
-
-[dependencies]
-httpdate = "1"
-# reqwest's default TLS is rustls (aws-lc-rs provider, the platform's
-# roots); http2 for the API, no system proxy lookup, no cookies.
-reqwest = { version = "0.13", default-features = false, features = [
-    "rustls",
-    "http2",
-    "charset",
-] }
-serde = { version = "1", features = ["derive"] }
-serde_json = "1"
-thiserror = "2"
-# Only tokio::spawn, for refresh_and_store; reqwest already runs on tokio.
-tokio = { version = "1", default-features = false, features = ["rt"] }
-url = "2"
-zeroize = "1"
-
-[dev-dependencies]
-tokio = { version = "1", default-features = false, features = [
-    "rt",
-    "macros",
-    "sync",
-] }
-wiremock = "0.6"
-
-[lints.rust]
-missing_docs = "warn"
-
-[lints.clippy]
-pedantic = { level = "warn", priority = -1 }
-complexity = { level = "deny", priority = -1 }
-must_use_candidate = "allow"
-needless_pass_by_value = "allow"
-unnecessary_wraps = "allow"
-unwrap_used = "deny"
-std_instead_of_alloc = "deny"
-std_instead_of_core = "deny"
-cognitive_complexity = "deny"
-too_many_lines = "deny"
-clone_on_ref_ptr = "deny"
-await_holding_lock = "deny"
-disallowed_methods = "deny"
-disallowed_types = "deny"
-large_futures = "allow"
diff --git a/ccwire-oauth/LICENSE b/ccwire-oauth/LICENSE
deleted file mode 100644
index 1b5ec8b..0000000
--- a/ccwire-oauth/LICENSE
+++ /dev/null
@@ -1,176 +0,0 @@
-                              Apache License
-                        Version 2.0, January 2004
-                     http://www.apache.org/licenses/
-
-TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-1. Definitions.
-
-   "License" shall mean the terms and conditions for use, reproduction,
-   and distribution as defined by Sections 1 through 9 of this document.
-
-   "Licensor" shall mean the copyright owner or entity authorized by
-   the copyright owner that is granting the License.
-
-   "Legal Entity" shall mean the union of the acting entity and all
-   other entities that control, are controlled by, or are under common
-   control with that entity. For the purposes of this definition,
-   "control" means (i) the power, direct or indirect, to cause the
-   direction or management of such entity, whether by contract or
-   otherwise, or (ii) ownership of fifty percent (50%) or more of the
-   outstanding shares, or (iii) beneficial ownership of such entity.
-
-   "You" (or "Your") shall mean an individual or Legal Entity
-   exercising permissions granted by this License.
-
-   "Source" form shall mean the preferred form for making modifications,
-   including but not limited to software source code, documentation
-   source, and configuration files.
-
-   "Object" form shall mean any form resulting from mechanical
-   transformation or translation of a Source form, including but
-   not limited to compiled object code, generated documentation,
-   and conversions to other media types.
-
-   "Work" shall mean the work of authorship, whether in Source or
-   Object form, made available under the License, as indicated by a
-   copyright notice that is included in or attached to the work
-   (an example is provided in the Appendix below).
-
-   "Derivative Works" shall mean any work, whether in Source or Object
-   form, that is based on (or derived from) the Work and for which the
-   editorial revisions, annotations, elaborations, or other modifications
-   represent, as a whole, an original work of authorship. For the purposes
-   of this License, Derivative Works shall not include works that remain
-   separable from, or merely link (or bind by name) to the interfaces of,
-   the Work and Derivative Works thereof.
-
-   "Contribution" shall mean any work of authorship, including
-   the original version of the Work and any modifications or additions
-   to that Work or Derivative Works thereof, that is intentionally
-   submitted to Licensor for inclusion in the Work by the copyright owner
-   or by an individual or Legal Entity authorized to submit on behalf of
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-   to the Licensor or its representatives, including but not limited to
-   communication on electronic mailing lists, source code control systems,
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-   Licensor for the purpose of discussing and improving the Work, but
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-   on behalf of whom a Contribution has been received by Licensor and
-   subsequently incorporated within the Work.
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-2. Grant of Copyright License. Subject to the terms and conditions of
-   this License, each Contributor hereby grants to You a perpetual,
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-   You may add Your own copyright statement to Your modifications and
-   may provide additional or different license terms and conditions
-   for use, reproduction, or distribution of Your modifications, or
-   for any such Derivative Works as a whole, provided Your use,
-   reproduction, and distribution of the Work otherwise complies with
-   the conditions stated in this License.
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-5. Submission of Contributions. Unless You explicitly state otherwise,
-   any Contribution intentionally submitted for inclusion in the Work
-   by You to the Licensor shall be under the terms and conditions of
-   this License, without any additional terms or conditions.
-   Notwithstanding the above, nothing herein shall supersede or modify
-   the terms of any separate license agreement you may have executed
-   with Licensor regarding such Contributions.
-
-6. Trademarks. This License does not grant permission to use the trade
-   names, trademarks, service marks, or product names of the Licensor,
-   except as required for reasonable and customary use in describing the
-   origin of the Work and reproducing the content of the NOTICE file.
-
-7. Disclaimer of Warranty. Unless required by applicable law or
-   agreed to in writing, Licensor provides the Work (and each
-   Contributor provides its Contributions) on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-   implied, including, without limitation, any warranties or conditions
-   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
-   PARTICULAR PURPOSE. You are solely responsible for determining the
-   appropriateness of using or redistributing the Work and assume any
-   risks associated with Your exercise of permissions under this License.
-
-8. Limitation of Liability. In no event and under no legal theory,
-   whether in tort (including negligence), contract, or otherwise,
-   unless required by applicable law (such as deliberate and grossly
-   negligent acts) or agreed to in writing, shall any Contributor be
-   liable to You for damages, including any direct, indirect, special,
-   incidental, or consequential damages of any character arising as a
-   result of this License or out of the use or inability to use the
-   Work (including but not limited to damages for loss of goodwill,
-   work stoppage, computer failure or malfunction, or any and all
-   other commercial damages or losses), even if such Contributor
-   has been advised of the possibility of such damages.
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-   the Work or Derivative Works thereof, You may choose to offer,
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-   on Your own behalf and on Your sole responsibility, not on behalf
-   of any other Contributor, and only if You agree to indemnify,
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-   incurred by, or claims asserted against, such Contributor by reason
-   of your accepting any such warranty or additional liability.
-
-END OF TERMS AND CONDITIONS
diff --git a/crates/ccwire-oauth/Cargo.toml b/crates/ccwire-oauth/Cargo.toml
new file mode 100644
index 0000000..f658385
--- /dev/null
+++ b/crates/ccwire-oauth/Cargo.toml
@@ -0,0 +1,35 @@
+[package]
+name = "ccwire-oauth"
+description = "A typed async client for the Claude account endpoints an OAuth login can call"
+version = "0.1.0"
+edition.workspace = true
+license.workspace = true
+readme = "README.md"
+repository.workspace = true
+documentation = "https://docs.rs/ccwire-oauth"
+authors.workspace = true
+rust-version.workspace = true
+keywords = ["claude", "oauth", "usage", "api-client"]
+categories = ["api-bindings"]
+# The recorded fixtures stay in the repo; the tests that include_str! them
+# go with them.
+exclude = ["tests"]
+
+[dependencies]
+httpdate.workspace = true
+reqwest.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+thiserror.workspace = true
+# Only tokio::spawn, for refresh_and_store; reqwest already runs on tokio.
+tokio = { workspace = true, features = ["rt"] }
+url.workspace = true
+zeroize.workspace = true
+
+[dev-dependencies]
+tokio = { workspace = true, features = ["rt", "macros", "sync"] }
+wiremock.workspace = true
+
+# missing_docs is warned in src/lib.rs (#![warn(missing_docs)]).
+[lints]
+workspace = true
diff --git a/crates/ccwire-oauth/LICENSE b/crates/ccwire-oauth/LICENSE
new file mode 120000
index 0000000..30cff74
--- /dev/null
+++ b/crates/ccwire-oauth/LICENSE
@@ -0,0 +1 @@
+../../LICENSE
\ No newline at end of file
diff --git a/ccwire-oauth/README.md b/crates/ccwire-oauth/README.md
similarity index 100%
rename from ccwire-oauth/README.md
rename to crates/ccwire-oauth/README.md
diff --git a/ccwire-oauth/src/client.rs b/crates/ccwire-oauth/src/client.rs
similarity index 100%
rename from ccwire-oauth/src/client.rs
rename to crates/ccwire-oauth/src/client.rs
diff --git a/ccwire-oauth/src/error.rs b/crates/ccwire-oauth/src/error.rs
similarity index 100%
rename from ccwire-oauth/src/error.rs
rename to crates/ccwire-oauth/src/error.rs
diff --git a/ccwire-oauth/src/lenient.rs b/crates/ccwire-oauth/src/lenient.rs
similarity index 100%
rename from ccwire-oauth/src/lenient.rs
rename to crates/ccwire-oauth/src/lenient.rs
diff --git a/ccwire-oauth/src/lib.rs b/crates/ccwire-oauth/src/lib.rs
similarity index 100%
rename from ccwire-oauth/src/lib.rs
rename to crates/ccwire-oauth/src/lib.rs
diff --git a/ccwire-oauth/src/secret.rs b/crates/ccwire-oauth/src/secret.rs
similarity index 100%
rename from ccwire-oauth/src/secret.rs
rename to crates/ccwire-oauth/src/secret.rs
diff --git a/ccwire-oauth/src/token.rs b/crates/ccwire-oauth/src/token.rs
similarity index 100%
rename from ccwire-oauth/src/token.rs
rename to crates/ccwire-oauth/src/token.rs
diff --git a/ccwire-oauth/src/types.rs b/crates/ccwire-oauth/src/types.rs
similarity index 100%
rename from ccwire-oauth/src/types.rs
rename to crates/ccwire-oauth/src/types.rs
diff --git a/ccwire-oauth/tests/client.rs b/crates/ccwire-oauth/tests/client.rs
similarity index 100%
rename from ccwire-oauth/tests/client.rs
rename to crates/ccwire-oauth/tests/client.rs
diff --git a/ccwire-oauth/tests/fixtures/README.md b/crates/ccwire-oauth/tests/fixtures/README.md
similarity index 100%
rename from ccwire-oauth/tests/fixtures/README.md
rename to crates/ccwire-oauth/tests/fixtures/README.md
diff --git a/ccwire-oauth/tests/fixtures/api_error_auth.json b/crates/ccwire-oauth/tests/fixtures/api_error_auth.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/api_error_auth.json
rename to crates/ccwire-oauth/tests/fixtures/api_error_auth.json
diff --git a/ccwire-oauth/tests/fixtures/api_error_rate_limit.json b/crates/ccwire-oauth/tests/fixtures/api_error_rate_limit.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/api_error_rate_limit.json
rename to crates/ccwire-oauth/tests/fixtures/api_error_rate_limit.json
diff --git a/ccwire-oauth/tests/fixtures/overage_spend_limit.json b/crates/ccwire-oauth/tests/fixtures/overage_spend_limit.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/overage_spend_limit.json
rename to crates/ccwire-oauth/tests/fixtures/overage_spend_limit.json
diff --git a/ccwire-oauth/tests/fixtures/prepaid_credits.json b/crates/ccwire-oauth/tests/fixtures/prepaid_credits.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/prepaid_credits.json
rename to crates/ccwire-oauth/tests/fixtures/prepaid_credits.json
diff --git a/ccwire-oauth/tests/fixtures/profile.json b/crates/ccwire-oauth/tests/fixtures/profile.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/profile.json
rename to crates/ccwire-oauth/tests/fixtures/profile.json
diff --git a/ccwire-oauth/tests/fixtures/profile_email_address.json b/crates/ccwire-oauth/tests/fixtures/profile_email_address.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/profile_email_address.json
rename to crates/ccwire-oauth/tests/fixtures/profile_email_address.json
diff --git a/ccwire-oauth/tests/fixtures/roles.json b/crates/ccwire-oauth/tests/fixtures/roles.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/roles.json
rename to crates/ccwire-oauth/tests/fixtures/roles.json
diff --git a/ccwire-oauth/tests/fixtures/token.json b/crates/ccwire-oauth/tests/fixtures/token.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/token.json
rename to crates/ccwire-oauth/tests/fixtures/token.json
diff --git a/ccwire-oauth/tests/fixtures/token_invalid_grant.json b/crates/ccwire-oauth/tests/fixtures/token_invalid_grant.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/token_invalid_grant.json
rename to crates/ccwire-oauth/tests/fixtures/token_invalid_grant.json
diff --git a/ccwire-oauth/tests/fixtures/token_no_rotation.json b/crates/ccwire-oauth/tests/fixtures/token_no_rotation.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/token_no_rotation.json
rename to crates/ccwire-oauth/tests/fixtures/token_no_rotation.json
diff --git a/ccwire-oauth/tests/fixtures/usage.json b/crates/ccwire-oauth/tests/fixtures/usage.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/usage.json
rename to crates/ccwire-oauth/tests/fixtures/usage.json
diff --git a/ccwire-oauth/tests/fixtures/usage_idle.json b/crates/ccwire-oauth/tests/fixtures/usage_idle.json
similarity index 100%
rename from ccwire-oauth/tests/fixtures/usage_idle.json
rename to crates/ccwire-oauth/tests/fixtures/usage_idle.json
diff --git a/crates/ccwire/Cargo.toml b/crates/ccwire/Cargo.toml
new file mode 100644
index 0000000..5c0a493
--- /dev/null
+++ b/crates/ccwire/Cargo.toml
@@ -0,0 +1,54 @@
+[package]
+name = "ccwire"
+description = "A Rust SDK for Claude Code: the stream-json protocol, typed"
+version = "0.1.1"
+edition.workspace = true
+license.workspace = true
+# The repository README (a symlink): the crate's README on crates.io.
+readme = "README.md"
+repository.workspace = true
+documentation = "https://docs.rs/ccwire"
+authors.workspace = true
+rust-version.workspace = true
+keywords = ["claude", "claude-code", "agent", "sdk"]
+categories = ["api-bindings"]
+# The golden corpus (and scrub.py, its tool) stays in the repo; its test
+# goes with it, as it include_str!s the corpus.
+exclude = ["tests/corpus", "tests/corpus.rs"]
+
+[features]
+default = []
+# The async layers over tokio: the framing's async reader and writer, and
+# the session core. The `protocol` module and the sync framing never need it.
+runtime = ["dep:tokio"]
+# Logs every `Other` and `Malformed` frame (debug and warn, with its type),
+# besides counting them (`protocol::stats`, always on).
+tracing = ["dep:tracing"]
+
+[dependencies]
+serde.workspace = true
+serde_json.workspace = true
+thiserror.workspace = true
+# Only what the session core uses: async I/O traits and buffering (io-util),
+# its channels (sync) and its reader/writer tasks (rt).
+tokio = { workspace = true, features = [
+    "io-util",
+    "sync",
+    "rt",
+], optional = true }
+tracing = { workspace = true, optional = true }
+
+[dev-dependencies]
+# The tests' runtimes (current-thread and multi-thread) and their hang
+# guard.
+tokio = { workspace = true, features = [
+    "io-util",
+    "sync",
+    "rt",
+    "rt-multi-thread",
+    "macros",
+    "time",
+] }
+
+[lints]
+workspace = true
diff --git a/crates/ccwire/LICENSE b/crates/ccwire/LICENSE
new file mode 120000
index 0000000..30cff74
--- /dev/null
+++ b/crates/ccwire/LICENSE
@@ -0,0 +1 @@
+../../LICENSE
\ No newline at end of file
diff --git a/crates/ccwire/README.md b/crates/ccwire/README.md
new file mode 120000
index 0000000..fe84005
--- /dev/null
+++ b/crates/ccwire/README.md
@@ -0,0 +1 @@
+../../README.md
\ No newline at end of file
diff --git a/src/framing.rs b/crates/ccwire/src/framing.rs
similarity index 100%
rename from src/framing.rs
rename to crates/ccwire/src/framing.rs
diff --git a/src/lib.rs b/crates/ccwire/src/lib.rs
similarity index 100%
rename from src/lib.rs
rename to crates/ccwire/src/lib.rs
diff --git a/src/options.rs b/crates/ccwire/src/options.rs
similarity index 100%
rename from src/options.rs
rename to crates/ccwire/src/options.rs
diff --git a/src/options/tests.rs b/crates/ccwire/src/options/tests.rs
similarity index 100%
rename from src/options/tests.rs
rename to crates/ccwire/src/options/tests.rs
diff --git a/src/protocol/content.rs b/crates/ccwire/src/protocol/content.rs
similarity index 100%
rename from src/protocol/content.rs
rename to crates/ccwire/src/protocol/content.rs
diff --git a/src/protocol/control.rs b/crates/ccwire/src/protocol/control.rs
similarity index 100%
rename from src/protocol/control.rs
rename to crates/ccwire/src/protocol/control.rs
diff --git a/src/protocol/field.rs b/crates/ccwire/src/protocol/field.rs
similarity index 100%
rename from src/protocol/field.rs
rename to crates/ccwire/src/protocol/field.rs
diff --git a/src/protocol/inbound.rs b/crates/ccwire/src/protocol/inbound.rs
similarity index 100%
rename from src/protocol/inbound.rs
rename to crates/ccwire/src/protocol/inbound.rs
diff --git a/src/protocol/input.rs b/crates/ccwire/src/protocol/input.rs
similarity index 100%
rename from src/protocol/input.rs
rename to crates/ccwire/src/protocol/input.rs
diff --git a/src/protocol/message.rs b/crates/ccwire/src/protocol/message.rs
similarity index 100%
rename from src/protocol/message.rs
rename to crates/ccwire/src/protocol/message.rs
diff --git a/src/protocol/mod.rs b/crates/ccwire/src/protocol/mod.rs
similarity index 100%
rename from src/protocol/mod.rs
rename to crates/ccwire/src/protocol/mod.rs
diff --git a/src/protocol/partial.rs b/crates/ccwire/src/protocol/partial.rs
similarity index 100%
rename from src/protocol/partial.rs
rename to crates/ccwire/src/protocol/partial.rs
diff --git a/src/protocol/result.rs b/crates/ccwire/src/protocol/result.rs
similarity index 100%
rename from src/protocol/result.rs
rename to crates/ccwire/src/protocol/result.rs
diff --git a/src/protocol/stats.rs b/crates/ccwire/src/protocol/stats.rs
similarity index 100%
rename from src/protocol/stats.rs
rename to crates/ccwire/src/protocol/stats.rs
diff --git a/src/protocol/system.rs b/crates/ccwire/src/protocol/system.rs
similarity index 100%
rename from src/protocol/system.rs
rename to crates/ccwire/src/protocol/system.rs
diff --git a/src/session.rs b/crates/ccwire/src/session.rs
similarity index 100%
rename from src/session.rs
rename to crates/ccwire/src/session.rs
diff --git a/tests/corpus.rs b/crates/ccwire/tests/corpus.rs
similarity index 100%
rename from tests/corpus.rs
rename to crates/ccwire/tests/corpus.rs
diff --git a/tests/corpus/README.md b/crates/ccwire/tests/corpus/README.md
similarity index 100%
rename from tests/corpus/README.md
rename to crates/ccwire/tests/corpus/README.md
diff --git a/tests/corpus/activity.jsonl b/crates/ccwire/tests/corpus/activity.jsonl
similarity index 100%
rename from tests/corpus/activity.jsonl
rename to crates/ccwire/tests/corpus/activity.jsonl
diff --git a/tests/corpus/multiturn.jsonl b/crates/ccwire/tests/corpus/multiturn.jsonl
similarity index 100%
rename from tests/corpus/multiturn.jsonl
rename to crates/ccwire/tests/corpus/multiturn.jsonl
diff --git a/tests/corpus/partial-text.jsonl b/crates/ccwire/tests/corpus/partial-text.jsonl
similarity index 100%
rename from tests/corpus/partial-text.jsonl
rename to crates/ccwire/tests/corpus/partial-text.jsonl
diff --git a/tests/corpus/partial-tool.jsonl b/crates/ccwire/tests/corpus/partial-tool.jsonl
similarity index 100%
rename from tests/corpus/partial-tool.jsonl
rename to crates/ccwire/tests/corpus/partial-tool.jsonl
diff --git a/tests/corpus/scrub.py b/crates/ccwire/tests/corpus/scrub.py
similarity index 100%
rename from tests/corpus/scrub.py
rename to crates/ccwire/tests/corpus/scrub.py
diff --git a/tests/corpus/stream.jsonl b/crates/ccwire/tests/corpus/stream.jsonl
similarity index 100%
rename from tests/corpus/stream.jsonl
rename to crates/ccwire/tests/corpus/stream.jsonl
diff --git a/tests/corpus/subagents-background.jsonl b/crates/ccwire/tests/corpus/subagents-background.jsonl
similarity index 100%
rename from tests/corpus/subagents-background.jsonl
rename to crates/ccwire/tests/corpus/subagents-background.jsonl
diff --git a/tests/corpus/subagents-fanout.jsonl b/crates/ccwire/tests/corpus/subagents-fanout.jsonl
similarity index 100%
rename from tests/corpus/subagents-fanout.jsonl
rename to crates/ccwire/tests/corpus/subagents-fanout.jsonl
diff --git a/tests/corpus/subagents-nested.jsonl b/crates/ccwire/tests/corpus/subagents-nested.jsonl
similarity index 100%
rename from tests/corpus/subagents-nested.jsonl
rename to crates/ccwire/tests/corpus/subagents-nested.jsonl
diff --git a/tests/corpus/subagents-self_resume.jsonl b/crates/ccwire/tests/corpus/subagents-self_resume.jsonl
similarity index 100%
rename from tests/corpus/subagents-self_resume.jsonl
rename to crates/ccwire/tests/corpus/subagents-self_resume.jsonl
diff --git a/tests/corpus/subagents-single.jsonl b/crates/ccwire/tests/corpus/subagents-single.jsonl
similarity index 100%
rename from tests/corpus/subagents-single.jsonl
rename to crates/ccwire/tests/corpus/subagents-single.jsonl
diff --git a/tests/corpus/synthetic.jsonl b/crates/ccwire/tests/corpus/synthetic.jsonl
similarity index 100%
rename from tests/corpus/synthetic.jsonl
rename to crates/ccwire/tests/corpus/synthetic.jsonl
diff --git a/tests/fake_claude/mod.rs b/crates/ccwire/tests/fake_claude/mod.rs
similarity index 100%
rename from tests/fake_claude/mod.rs
rename to crates/ccwire/tests/fake_claude/mod.rs
diff --git a/tests/framing.rs b/crates/ccwire/tests/framing.rs
similarity index 100%
rename from tests/framing.rs
rename to crates/ccwire/tests/framing.rs
diff --git a/tests/property.rs b/crates/ccwire/tests/property.rs
similarity index 100%
rename from tests/property.rs
rename to crates/ccwire/tests/property.rs
diff --git a/tests/protocol.rs b/crates/ccwire/tests/protocol.rs
similarity index 100%
rename from tests/protocol.rs
rename to crates/ccwire/tests/protocol.rs
diff --git a/tests/session.rs b/crates/ccwire/tests/session.rs
similarity index 100%
rename from tests/session.rs
rename to crates/ccwire/tests/session.rs
diff --git a/deny.toml b/deny.toml
index 1aaaaa3..a9804ed 100644
--- a/deny.toml
+++ b/deny.toml
@@ -30,7 +30,11 @@ confidence-threshold = 0.9
 # The list is the policy, not an inventory: no warning for an allowed
 # license no dependency uses (yet).
 unused-allowed-license = "allow"
-exceptions = []
+exceptions = [
+    # Mozilla's root certificates as data (reqwest -> rustls-platform-verifier,
+    # ccwire-oauth): CDLA-Permissive-2.0, a permissive data license.
+    { crate = "webpki-root-certs", allow = ["CDLA-Permissive-2.0"] },
+]
 
 [licenses.private]
 ignore = false
diff --git a/flake.nix b/flake.nix
index 8bbe394..8ddb48f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -13,7 +13,7 @@
         "aarch64-darwin"
       ];
       forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f nixpkgs.legacyPackages.${system});
-      manifest = (nixpkgs.lib.importTOML ./Cargo.toml).package;
+      manifest = (nixpkgs.lib.importTOML ./crates/ccwire/Cargo.toml).package;
     in
     {
       # The whole workspace, built and tested (every feature) in the sandbox.
diff --git a/release-plz.toml b/release-plz.toml
index 78b97ca..d344819 100644
--- a/release-plz.toml
+++ b/release-plz.toml
@@ -22,10 +22,10 @@ pr_draft = false
 name = "ccwire"
 git_tag_name = "v{{ version }}"
 git_release_name = "v{{ version }}"
-changelog_path = "CHANGELOG.md"
+changelog_path = "crates/ccwire/CHANGELOG.md"
 
 [[package]]
 name = "ccwire-oauth"
 git_tag_name = "ccwire-oauth-v{{ version }}"
 git_release_name = "ccwire-oauth-v{{ version }}"
-changelog_path = "ccwire-oauth/CHANGELOG.md"
+changelog_path = "crates/ccwire-oauth/CHANGELOG.md"