chore: release

[caiopensrc]

🤖 New release

• c2pa: 0.87.0 -> 0.88.0 (⚠ API breaking changes)
• c2pa-c-ffi: 0.87.0 -> 0.88.0
• c2patool: 0.26.66 -> 0.26.67

⚠ c2pa breaking changes

--- failure inherent_method_missing: pub method removed or renamed ---

Description:
A publicly-visible method or associated fn is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/inherent_method_missing.ron

Failed in:
  Ingredient::set_memory_thumbnail, previously in file /tmp/.tmpGYytCx/c2pa/src/ingredient.rs:453
  Ingredient::from_file, previously in file /tmp/.tmpGYytCx/c2pa/src/ingredient.rs:760
  Ingredient::from_file_with_folder, previously in file /tmp/.tmpGYytCx/c2pa/src/ingredient.rs:772
  Ingredient::from_file_with_options, previously in file /tmp/.tmpGYytCx/c2pa/src/ingredient.rs:795
  Ingredient::from_memory, previously in file /tmp/.tmpGYytCx/c2pa/src/ingredient.rs:894
  Ingredient::with_base_path, previously in file /tmp/.tmpGYytCx/c2pa/src/ingredient.rs:1561
  Manifest::with_base_path, previously in file /tmp/.tmpGYytCx/c2pa/src/manifest.rs:381

--- failure struct_pub_field_missing: pub struct's pub field removed or renamed ---

Description:
A publicly-visible struct has at least one public field that is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/struct_pub_field_missing.ron

Failed in:
  field base_path of struct Builder, previously in file /tmp/.tmpGYytCx/c2pa/src/builder.rs:426
  field intent of struct Builder, previously in file /tmp/.tmpGYytCx/c2pa/src/builder.rs:430

--- failure struct_pub_field_now_doc_hidden: pub struct field is now #[doc(hidden)] ---

Description:
A pub field of a pub struct is now marked #[doc(hidden)] and is no longer part of the public API.
        ref: https://doc.rust-lang.org/rustdoc/write-documentation/the-doc-attribute.html#hidden
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/struct_pub_field_now_doc_hidden.ron

Failed in:
  field Builder.base_path in file /tmp/.tmp7ZDfRj/c2pa-rs/sdk/src/builder.rs:410
  field Builder.intent in file /tmp/.tmp7ZDfRj/c2pa-rs/sdk/src/builder.rs:410

Changelog

c2pa

0.88.0

11 June 2026

Added

• Remove some long deprecated APIs (#2206)

c2pa-c-ffi

0.88.0

11 June 2026

Added

• Remove some long deprecated APIs (#2206)

c2patool

0.26.67

11 June 2026

Added

• Remove some long deprecated APIs (#2206)

---

This PR was generated with release-plz.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.26%. Comparing base (0a1a717) to head (e5be58e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2234   +/-   ##
=======================================
  Coverage   78.26%   78.26%           
=======================================
  Files         175      175           
  Lines       46004    46004           
=======================================
  Hits        36004    36004           
  Misses      10000    10000           

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[codspeed-hq]

Merging this PR will not alter performance

✅ 30 untouched benchmarks
⏩ 64 skipped benchmarks¹

---

_{Comparing release-plz-2026-06-11T20-29-14Z (e5be58e) with main (f999e1a)²}

Footnotes

1. 64 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on main (0a1a717) during the generation of this report, so f999e1a was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩