Automate Docker container image updates
This report presents the forensic synthetic code analysis of nicholas-fedor/watchtower, a Go project with 4,016 GitHub stars. SynthScan v2.0 examined 114,077 lines of code across 370 source files, recording 363 pattern matches distributed across 8 syntactic categories. The overall adjusted score of 4.4 places this repository in the Likely human-written band.
The scanner applied 160+ deterministic lexical heuristics, multi-line block detectors, abstract syntax tree depth profilers, and a cross-file Jaccard similarity matrix to construct a statistically normalised synthetic code estimate. All matches are individually weighted by severity coefficient and contextual multiplier before summation, and the resulting headline score is temporally discounted to account for the repository's development history relative to the commercial emergence of large language model coding tooling (November 2022 onward).
This chart maps the temporal evolution of the adjusted synthetic code score across successive scan runs. An upward trajectory indicates ongoing incorporation of AI-generated code or expanding LLM-assisted scaffolding; a stable or declining trajectory may reflect active human refactoring, code removal, or the adoption of stricter authorship policies. The dashed secondary line (right axis) independently tracks total raw pattern hit count, which can diverge from the normalised score when codebase size changes significantly between scans.
Classifies detected patterns by their diagnostic confidence and structural impact. CRITICAL patterns (coefficient 10) represent definitive synthetic signatures — hallucinated imports, explicit LLM attribution metadata — virtually never produced by human authors. HIGH (5) indicates strong structural tells such as cross-file repetition or cross-linguistic idioms. MEDIUM (2) covers recognisable conversational padding and AI-specific vocabulary. LOW (1) captures subtle indicators like tautological comments and generic boilerplate that require density to carry independent signal.
This horizontal bar chart decomposes the repository's raw synthetic code score by top-level directory, allowing you to pinpoint precisely which modules or components carry the highest AI authorship density. Directories with disproportionately high scores relative to their size warrant targeted manual review: concentrated AI signatures often trace back to mass-generated configuration layers, auto-ported test suites, LLM-scaffolded boilerplate classes, or entire subsystems authored under heavy copilot assistance. Use this view to prioritise your human code-review effort.
The scanner identified 363 distinct pattern matches across 8 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a statistically significant AI authorship indicator. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.
Reading the findings table: The Severity column indicates the diagnostic confidence level (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — comment-context matches receive a ×1.5 weight because LLMs systematically over-annotate. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier as dense clusters constitute far stronger evidence of synthetic authorship than isolated hits.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | main.go | 1 | // @title Watchtower HTTP API | COMMENT |
| LOW | main.go | 21 | // @tag.name health | COMMENT |
| LOW | cmd/notify-upgrade.go | 61 | // - _: A slice of strings representing positional arguments, unused here as the command accepts no arguments (enforce | COMMENT |
| LOW | cmd/doc.go | 1 | // Package cmd contains the command-line interface (CLI) definitions and execution logic for Watchtower. | COMMENT |
| LOW | cmd/root.go | 41 | client container.Client | COMMENT |
| LOW | cmd/root.go | 61 | COMMENT | |
| LOW | cmd/root.go | 81 | // | COMMENT |
| LOW | cmd/root.go | 101 | // When set, only containers whose image matches one of these patterns are monitored. | COMMENT |
| LOW | cmd/root.go | 121 | // timeout specifies the maximum duration allowed for container stop operations during updates. | COMMENT |
| LOW | cmd/root.go | 141 | // It is configured in preRun via the --rolling-restart flag or the WATCHTOWER_ROLLING_RESTART environment variable, | COMMENT |
| LOW | cmd/root.go | 161 | scope string | COMMENT |
| LOW | cmd/root.go | 181 | // notificationSplitByContainer is a boolean flag enabling separate notifications for each updated container. | COMMENT |
| LOW | cmd/root.go | 201 | // When true, Watchtower uses a short-lived orchestrator container to perform the self-update | COMMENT |
| LOW | cmd/root.go | 221 | // It is initialized to time.Sleep by default, providing a way to mock sleep behavior during testing | COMMENT |
| LOW | cmd/root.go | 521 | // Set up the notification system with types specified via flags (e.g., email, Slack). | COMMENT |
| LOW | cmd/root.go | 721 | // It validates the environment, performs one-time updates if specified, | COMMENT |
| LOW | cmd/root.go | 741 | COMMENT | |
| LOW | internal/metrics/doc.go | 1 | // Package metrics provides tracking and exposure of Watchtower scan metrics. | COMMENT |
| LOW | internal/flags/flags.go | 681 | // markFlagDeprecated marks a pflag as deprecated with a migration hint. | COMMENT |
| LOW | internal/flags/flags.go | 721 | COMMENT | |
| LOW | internal/flags/flags.go | 1041 | }).Debug("Configured Docker environment variables") | COMMENT |
| LOW | internal/flags/flags.go | 1481 | // | COMMENT |
| LOW | internal/flags/doc.go | 1 | // Package flags manages command-line flags and environment variables for Watchtower configuration. | COMMENT |
| LOW | internal/util/util.go | 81 | // | COMMENT |
| LOW | internal/util/util.go | 201 | COMMENT | |
| LOW | internal/util/util.go | 261 | // Returns: | COMMENT |
| LOW | internal/util/util.go | 321 | } | COMMENT |
| LOW | internal/util/doc.go | 1 | // Package util provides utility functions for Watchtower operations. | COMMENT |
| LOW | internal/scheduling/scheduling.go | 61 | // Parameters: | COMMENT |
| LOW | internal/scheduling/scheduling.go | 281 | } | COMMENT |
| LOW | internal/actions/ephemeral.go | 41 | // errOrchestratorCreateFailed indicates a failure to create the new container. | COMMENT |
| LOW | internal/actions/ephemeral.go | 61 | // This function returns immediately after starting the orchestrator. The | COMMENT |
| LOW | internal/actions/ephemeral.go | 161 | // | COMMENT |
| LOW | internal/actions/ephemeral.go | 181 | // 2. INSPECT: Get the old container's full configuration | COMMENT |
| LOW | internal/actions/ephemeral.go | 281 | COMMENT | |
| LOW | internal/actions/ephemeral.go | 361 | // after the source Watchtower process is stopped by the orchestrator. | COMMENT |
| LOW | internal/actions/ephemeral.go | 441 | // name for the new one. If StopContainer returns NotFound, removal is skipped | COMMENT |
| LOW | internal/actions/ephemeral.go | 561 | clog.WithError(err).Error("Failed to create and start new container") | COMMENT |
| LOW | internal/actions/update.go | 581 | "container", | COMMENT |
| LOW | internal/actions/update.go | 701 | logrus.WithField( | COMMENT |
| LOW | internal/actions/update.go | 761 | } | COMMENT |
| LOW | internal/actions/update.go | 1061 | COMMENT | |
| LOW | internal/actions/update.go | 1181 | // Uses the container name with ":latest" as the fallback image. | COMMENT |
| LOW | internal/actions/update.go | 1341 | // It stops each container, tracking stopped images and errors, to prepare for restarts while | COMMENT |
| LOW | internal/actions/update.go | 1421 | // | COMMENT |
| LOW | internal/actions/update.go | 1521 | } | COMMENT |
| LOW | internal/actions/update.go | 1681 | COMMENT | |
| LOW | internal/actions/cleanup.go | 21 | COMMENT | |
| LOW | internal/actions/cleanup.go | 101 | return removed, err | COMMENT |
| LOW | internal/actions/cleanup.go | 381 | "excess_containers_found": len(excessContainers), | COMMENT |
| LOW | internal/actions/cleanup.go | 521 | for _, c := range containersToRemoveMap { | COMMENT |
| LOW | internal/actions/cleanup.go | 681 | // | COMMENT |
| LOW | internal/actions/actions.go | 61 | SkipSelfUpdate bool // Skip Watchtower self-update | COMMENT |
| LOW | internal/actions/actions.go | 241 | func (emptyReport) All() []types.ContainerReport { return nil } | COMMENT |
| LOW | internal/actions/actions.go | 281 | Failed: 0, | COMMENT |
| LOW | internal/actions/actions.go | 381 | // | COMMENT |
| LOW | internal/actions/actions.go | 481 | // | COMMENT |
| LOW | internal/actions/actions.go | 521 | } | COMMENT |
| LOW | internal/actions/actions.go | 621 | "failed": len(result.Failed()), | COMMENT |
| LOW | internal/actions/actions.go | 661 | COMMENT | |
| 226 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | cliff.toml | 9 | # ────────────────────────────────────────────────────────────── | COMMENT |
| MEDIUM | cliff.toml | 12 | # ────────────────────────────────────────────────────────────── | COMMENT |
| MEDIUM | cliff.toml | 23 | # ────────────────────────────────────────────────────────────── | STRING |
| MEDIUM | cliff.toml | 26 | # ────────────────────────────────────────────────────────────── | STRING |
| MEDIUM | cliff.toml | 61 | # ────────────────────────────────────────────────────────────── | STRING |
| MEDIUM | cliff.toml | 64 | # ────────────────────────────────────────────────────────────── | STRING |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 6 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 8 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 15 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 17 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 23 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 25 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 30 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 32 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 38 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 40 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 70 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 72 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 76 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 78 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 95 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 97 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 115 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 117 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 123 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM⚡ | examples/lifecycle-hooks/synology-stop/synology-stop.sh | 125 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 7 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 9 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 44 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 46 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 70 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 72 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 116 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 118 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 148 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 150 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 180 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 182 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 221 | # ------------------------------------------------------------------ | COMMENT |
| MEDIUM | …lifecycle-hooks/synology-stop/test_synology_parsing.sh | 223 | # ------------------------------------------------------------------ | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | pkg/registry/auth/auth_test.go | 1358 | // required fields (e.g., service). Ensures robust error handling for malformed inputs. | COMMENT |
| MEDIUM | pkg/registry/auth/auth_fuzz_test.go | 18 | // with malformed authentication challenge strings. It ensures robust parsing of WWW-Authenticate headers | COMMENT |
| MEDIUM | pkg/registry/auth/auth_fuzz_test.go | 100 | // FuzzGetBearerHeader fuzzes the JSON unmarshaling in GetBearerHeader to ensure robust parsing | COMMENT |
| MEDIUM | pkg/registry/auth/auth_fuzz_test.go | 156 | // with various base64-encoded inputs. It ensures robust decoding and unmarshaling of JSON credentials, | COMMENT |
| MEDIUM | pkg/registry/auth/auth_fuzz_test.go | 188 | // with malformed authentication challenge strings. It ensures robust URL construction from | COMMENT |
| MEDIUM | pkg/registry/digest/digest_integration_fuzz_test.go | 84 | // FuzzDigestsMatch fuzzes the digestsMatch function to ensure robust handling of malformed inputs. | COMMENT |
| MEDIUM | pkg/registry/digest/digest_integration_fuzz_test.go | 119 | // FuzzBuildManifestURL fuzzes the buildManifestURL function to ensure robust URL construction. | COMMENT |
| MEDIUM | pkg/registry/manifest/manifest_fuzz_test.go | 16 | // to ensure robust parsing. It tests valid references, malformed strings, and edge cases to prevent | COMMENT |
| MEDIUM | pkg/notifications/shoutrrr_fuzz_test.go | 8 | // FuzzGetShoutrrrTemplate fuzzes the getShoutrrrTemplate function to ensure robust parsing of template strings. | COMMENT |
| MEDIUM | pkg/notifications/shoutrrr_fuzz_test.go | 26 | // FuzzSanitizeURLForLogging fuzzes the sanitizeURLForLogging function to ensure robust URL parsing. | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | internal/metrics/doc.go | 8 | // Usage example: | COMMENT |
| LOW | internal/flags/doc.go | 10 | // Usage example: | COMMENT |
| LOW | internal/util/doc.go | 13 | // Usage example: | COMMENT |
| LOW | internal/actions/doc.go | 12 | // Usage example: | COMMENT |
| LOW | pkg/filters/doc.go | 8 | // Usage example: | COMMENT |
| LOW | pkg/types/doc.go | 13 | // Usage example: | COMMENT |
| LOW | pkg/sorter/doc.go | 9 | // Usage example: | COMMENT |
| LOW | pkg/compose/doc.go | 11 | // Usage example: | COMMENT |
| LOW | pkg/lifecycle/doc.go | 8 | // Usage example: | COMMENT |
| LOW | pkg/container/doc.go | 12 | // Usage example: | COMMENT |
| LOW | pkg/registry/doc.go | 12 | // Usage example: | COMMENT |
| LOW | pkg/notifications/doc.go | 15 | // Usage example: | COMMENT |
| LOW | pkg/session/doc.go | 11 | // Usage example: | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | docs/http-api/configuration/tls/index.md | 27 | ### Step 1: Obtain a Certificate and Private Key | COMMENT |
| LOW | docs/http-api/configuration/tls/index.md | 59 | ### Step 2: Prepare Files for the Container | COMMENT |
| LOW | docs/http-api/configuration/tls/index.md | 70 | ### Step 3: Mount and Configure Watchtower | COMMENT |
| LOW | docs/http-api/configuration/tls/index.md | 110 | ### Step 4: Connect Using HTTPS | COMMENT |
| LOW⚡ | pkg/container/cycles.go | 70 | // Step 1: Mark node as visiting (gray) and add to current exploration path | COMMENT |
| LOW⚡ | pkg/container/cycles.go | 76 | // Step 2: Explore all dependencies (neighbors) of this node | COMMENT |
| LOW | pkg/container/cycles.go | 109 | // Step 3: Backtrack - remove node from current path and mark as fully visited (black) | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | scripts/docker-util.sh | 2 | # This file is meant to be sourced into other scripts and contain some utility functions for docker e2e testing | COMMENT |
| MEDIUM | .circleci/continue-config.yml | 14 | # Define a job to be invoked later in a workflow. | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW⚡ | pkg/container/cycles.go | 70 | // Step 1: Mark node as visiting (gray) and add to current exploration path | COMMENT |
| LOW⚡ | pkg/container/cycles.go | 76 | // Step 2: Explore all dependencies (neighbors) of this node | COMMENT |
| LOW | pkg/container/cycles.go | 109 | // Step 3: Backtrack - remove node from current path and mark as fully visited (black) | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | test/scripts/test_tls_integration.sh | 52 | # Check if certs exist | COMMENT |
| LOW | .github/workflows/release-nightly.yaml | 69 | # Check if there are any changes in the watched paths since last successful nightly run | COMMENT |