Width-aware rendering: the banner now fits any terminal

.github/workflows/ci.yml

@@ -16,9 +16,9 @@ jobs:
         with:
           go-version: '1.22'
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
+        uses: golangci/golangci-lint-action@v8
         with:
-          version: latest
+          version: v2.5.0
           args: --timeout=5m
       - name: Check formatting
         run: |

.gitignore

@@ -11,7 +11,7 @@ RELEASE.md
 
 # Go build artifacts
 bin/
-sysgreet
+/sysgreet
 *.test
 *.exe
 *.exe~

.golangci.yml

@@ -1,46 +1,54 @@
+version: "2"
 run:
-  timeout: 5m
-  tests: true
   modules-download-mode: readonly
-
+  tests: true
 linters:
   enable:
-    - errcheck
-    - gosimple
-    - govet
-    - ineffassign
-    - staticcheck
-    - unused
-    - gofmt
-    - goimports
-    - misspell
-    - unconvert
-    - unparam
+    - copyloopvar
     - goconst
     - gocyclo
     - gosec
-    - copyloopvar
-
-linters-settings:
-  gocyclo:
-    min-complexity: 15
-  goconst:
-    min-len: 3
-    min-occurrences: 3
-  misspell:
-    locale: US
-
+    - misspell
+    - unconvert
+    - unparam
+  settings:
+    goconst:
+      min-len: 3
+      min-occurrences: 3
+    gocyclo:
+      min-complexity: 15
+    misspell:
+      locale: US
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    rules:
+      - linters:
+          - gocyclo
+          - gosec
+          - unparam
+        path: _test\.go
+      - linters:
+          - staticcheck
+        text: cgo-gcc-prolog
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
 issues:
-  exclude-rules:
-    # Exclude some linters from running on tests files
-    - path: _test\.go
-      linters:
-        - gocyclo
-        - gosec
-        - unparam
-    # Ignore CGO warnings from dependencies
-    - text: "cgo-gcc-prolog"
-      linters:
-        - staticcheck
   max-issues-per-linter: 0
   max-same-issues: 0
+formatters:
+  enable:
+    - gofmt
+    - goimports
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$

CHANGELOG.md

@@ -1,5 +1,31 @@
 # Changelog
 
+## v1.1.0
+
+### Added
+
+- **Width-aware rendering** - Sysgreet now detects the terminal width and guarantees the banner never wraps mid-glyph. When the configured font is too wide it steps down gracefully: drop the domain from the hostname (the full name moves to an info line), try a narrower font, and finally render a clean single-line ruled header. Narrow tmux panes and phone SSH sessions stay readable.
+- **`Small` font** - A narrower FIGlet font (from the standard figlet distribution) embedded as the last art step before the plain-header fallback.
+- **Truecolor gradients** - On terminals advertising `COLORTERM=truecolor`, gradient stops are interpolated into a smooth 24-bit fade. 16-color terminals keep the existing per-line cycling.
+- **`--json` flag** - Emit the banner as structured JSON for scripting (section data includes raw percentages for thresholding in pipelines). Never prompts for bootstrap.
+- **New flags** - `--font` (per-run font override), `--width` (assume a terminal width), `--no-color`, `--config` (explicit config path), `--list-fonts`.
+- **`layout.max_width`** - Config key (and `SYSGREET_LAYOUT_MAX_WIDTH`) to cap banner width below the detected terminal size.
+- **Windows legacy console support** - Virtual terminal processing is enabled before writing escapes; when the console refuses, output falls back to plain text instead of printing raw escape codes.
+
+### Fixed
+
+- **`NO_COLOR` now covers the whole banner** - Previously the hostname art kept its gradient with `NO_COLOR` set; escape sequences are now fully suppressed, including when output is piped or `TERM=dumb`.
+- **Piped output is plain** - `sysgreet > motd.txt` no longer embeds ANSI codes; color is keyed off whether stdout is a terminal.
+- **`--text` and `--demo` honor your config** - Both modes previously ignored the config file, so custom fonts and gradients silently didn't apply.
+- **Compact mode is actually compact** - `layout.compact` now emits a true single line using the plain hostname instead of embedding the multi-line art.
+- **Unknown fonts fall back deterministically** - A typo in `ascii.font` now falls back to the default font (logged under `SYSGREET_DEBUG`) instead of picking a random font every login.
+- **Long body lines clip cleanly** - Info lines that exceed the terminal width are truncated with an ellipsis instead of wrapping.
+
+### Changed
+
+- **Collectors run concurrently** - All five collectors gather in parallel under a shared 250 ms deadline, so a slow metric source can never hang a login. Windows logins no longer pay the 100 ms CPU sample serially.
+- **One color palette** - The ANSI color tables previously duplicated (and drifted) across packages now live in a single `internal/terminal` package alongside width and capability detection.
+
 ## v0.9.1
 
 ### Added

CONTRIBUTING.md

@@ -154,7 +154,8 @@ sysgreet/
 │   ├── collectors/        # System data collectors
 │   ├── config/            # Configuration loading
 │   ├── network/           # Network utilities
-│   └── render/            # Layout and color rendering
+│   ├── render/            # Layout, clipping, and JSON rendering
+│   └── terminal/          # Terminal width/color detection, ANSI palette
 ├── test/
 │   ├── benchmarks/        # Performance benchmarks
 │   └── integration/       # Platform-specific integration tests
@@ -199,6 +200,18 @@ Sysgreet has strict performance requirements:
 
 When adding new collectors or features, ensure they don't violate these constraints.
 
+Collectors run concurrently inside `Providers.Gather` under a shared 250 ms
+deadline, so honor the `context.Context` you receive — a collector that
+ignores cancellation can still delay a login.
+
+## Output Rules
+
+- Never print wider than the terminal. The ascii renderer receives a
+  `MaxWidth` and walks a fallback ladder; anything you add to the banner body
+  is clipped by the render layer. Don't bypass either.
+- All color must flow through `internal/terminal` so `NO_COLOR`, `TERM=dumb`,
+  piped output, and Windows console quirks stay handled in one place.
+
 ## Documentation
 
 ### README Updates

README.md

@@ -38,17 +38,26 @@ network or depending on external runtimes.
 
 - **Single static binary** - Go 1.22+, no CGO, no daemons, no service
   dependencies.
+- **Fits any terminal** - Sysgreet measures the terminal before printing and
+  steps the banner down gracefully (shorter hostname, then a narrower font,
+  then a clean one-line header) instead of wrapping ASCII art into garbage.
+  Split tmux panes and phone SSH sessions stay readable.
 - **Cross-platform parity** - Linux/macOS show load averages; Windows surfaces
-  CPU usage. Interface filtering avoids noisy virtual adapters everywhere.
+  CPU usage (and legacy consoles get plain text instead of raw escape codes).
+  Interface filtering avoids noisy virtual adapters everywhere.
 - **Configurable yet optional** - YAML or TOML profiles toggle sections, pick
   fonts/colors, set layout order, and cap the interface list. Defaults "just
   work" with zero files.
 - **Graceful degradation** - Missing metrics or SSH metadata simply fall back;
   the banner keeps rendering.
-- **Performance-guarded** - Startup benchmark (<50 ms median, <80 ms p95) runs in
-  CI; process RSS stays <15 MB.
-- **Professional aesthetics** - Unicode block fonts with gradient colors,
-  automatic monochrome fallback, 80-column mindful layout.
+- **Performance-guarded** - Collectors run in parallel under a hard 250 ms
+  deadline; the startup benchmark (<50 ms median, <80 ms p95) runs in CI and
+  process RSS stays <15 MB.
+- **Professional aesthetics** - Unicode block fonts with gradient colors —
+  smooth 24-bit fades on truecolor terminals — plus automatic monochrome
+  fallback and full `NO_COLOR` support.
+- **Script-friendly** - `--json` emits the same data as structured JSON;
+  piped output is always plain text.
 
 ---
 
@@ -107,6 +116,19 @@ sysgreet --disable
 sysgreet --text "Production DB"
 sysgreet --text "Coffee Break"
 sysgreet --text "Deploy Day"
+
+# JSON mode - structured output for scripts (no art, no prompts)
+sysgreet --json | jq -r '.hostname'
+```
+
+**Useful flags:**
+
+```bash
+sysgreet --list-fonts          # Print the embedded fonts
+sysgreet --font "ANSI Shadow"  # One-off font override
+sysgreet --width 60            # Preview how a 60-column session renders
+sysgreet --no-color            # Plain output (NO_COLOR works too)
+sysgreet --config ~/alt.yaml   # Point at a specific config file
 ```
 
 > **Tip:** Use `--text` to create custom banners for different environments, reminders, or just for fun. Great for distinguishing production boxes, marking maintenance windows, or adding personality to your terminals.
@@ -119,7 +141,10 @@ sysgreet --text "Deploy Day"
 
 Sysgreet looks for configuration in this order:
 
-1. `SYSGREET_CONFIG` environment variable (absolute or `~/` paths)
+1. `--config` flag or `SYSGREET_CONFIG` environment variable (absolute or
+   `~/` paths). An explicit path is exclusive — if the file is missing,
+   sysgreet uses built-in defaults rather than silently reading another
+   config.
 2. `~/.config/sysgreet/config.yaml` (or `.yml`, `.toml`)
 3. `~/.sysgreet.yaml` / `.toml`
 
@@ -147,6 +172,7 @@ display:
 
 layout:
   compact: false
+  max_width: 0 # cap banner width in columns; 0 = detected terminal width
   sections: ["header", "network", "system", "resources"]
 
 network:
@@ -182,12 +208,28 @@ Environment variables override everything (e.g.
   yellow, ≥90% in red). Windows surfaces realtime CPU usage; Unix hosts show load
   averages.
 
+### Terminal width handling
+
+The hostname art is only printed when it actually fits. On narrow terminals
+sysgreet steps down automatically:
+
+1. Full hostname in your configured font
+2. Hostname without the domain (`pve1.home.lan` → `PVE1`, with the full name
+   kept on an info line)
+3. Progressively narrower fonts (`standard`, then `Small`)
+4. A single ruled line — `═════ PVE1 ═════` — that fits any width
+
+Set `layout.max_width` to cap the width below what the terminal reports, or
+pass `--width` to preview a specific size.
+
 ---
 
 ## Performance guarantees
 
 - **Startup** - `< 50 ms` median, `< 80 ms` p95 (validated by
   `go test -bench Startup ./test/benchmarks`)
+- **Never hangs a login** - Collectors run concurrently under a shared 250 ms
+  deadline; a stuck metric source just drops its section
 - **Binary footprint** - `< 10 MB` for all release targets (GoReleaser checks)
 - **Runtime memory** - `< 15 MB` RSS for default banner
 - **No network activity** - All data collected locally, offline-safe
@@ -237,7 +279,6 @@ platform-specific improvements before diving in.
 
 ## Roadmap
 
-- Optional JSON output for scripting in CI/CD pipelines
 - Extended GPU/storage telemetry for workstation profiles
 - Pluggable section framework (e.g., Kubernetes context, vault status)
 - Prebuilt Windows installer for enterprise onboarding