v0.0.26 - Add mnemonic-stdin and mnemonic-fd startup input modes with tests/docs

README.md

@@ -80,6 +80,13 @@ When started, `n_signer` immediately enters terminal input mode:
 
 No startup files are read or written. The mnemonic — typed or generated — lives only in `mlock`'d memory and is zeroized on shutdown or crash.
 
+For parent-process launchers, startup can also be non-interactive:
+
+- `--mnemonic-stdin`: read one mnemonic line from stdin at startup, then continue normally.
+- `--mnemonic-fd N`: read one mnemonic line from inherited file descriptor `N` at startup.
+
+These modes avoid putting mnemonic material in argv/environment and are designed for supervised spawners. See [`plans/mnemonic_startup_input.md`](plans/mnemonic_startup_input.md) for the full behavior contract.
+
 ### 3.2 Running phase (status display + signer)
 
 After unlock, terminal becomes a live status and control console. Example layout:
@@ -366,6 +373,7 @@ Build outputs a single executable artifact.
 - [`build_static.sh`](build_static.sh): musl-static build path
 - [`Makefile`](Makefile): local build targets
 - [`Dockerfile.alpine-musl`](Dockerfile.alpine-musl): reproducible Alpine musl toolchain
+- [`resources/tui_continuous/tui_continuous.h`](resources/tui_continuous/tui_continuous.h) + [`resources/tui_continuous/tui_continuous.c`](resources/tui_continuous/tui_continuous.c): vendored continuous-TUI component (from `~/lt/aesthetics`, API baseline `TUI_CONTINUOUS_VERSION 0.0.9`)
 - [`increment_and_push.sh`](increment_and_push.sh): version/tag/release workflow
 - [`src/main.c`](src/main.c): version macros (`NSIGNER_VERSION*`)