diff --git a/aurorastation.dme b/aurorastation.dme
index ab54338032d..ce703c65f2f 100644
--- a/aurorastation.dme
+++ b/aurorastation.dme
@@ -277,6 +277,7 @@
 #include "code\__HELPERS\logging\subsystems\mapfinalization.dm"
 #include "code\__HELPERS\logging\subsystems\odyssey.dm"
 #include "code\__HELPERS\logging\subsystems\persistence.dm"
+#include "code\__HELPERS\logging\subsystems\sentry.dm"
 #include "code\__HELPERS\logging\subsystems\ZAS.dm"
 #include "code\__HELPERS\paths\jps.dm"
 #include "code\__HELPERS\paths\path.dm"
@@ -389,6 +390,7 @@
 #include "code\controllers\subsystems\records.dm"
 #include "code\controllers\subsystems\responseteam.dm"
 #include "code\controllers\subsystems\runechat.dm"
+#include "code\controllers\subsystems\sentry.dm"
 #include "code\controllers\subsystems\skills.dm"
 #include "code\controllers\subsystems\skybox.dm"
 #include "code\controllers\subsystems\sound_loops.dm"
@@ -3780,6 +3782,7 @@
 #include "code\modules\research\xenoarchaeology\tools\tools_pickaxe.dm"
 #include "code\modules\security levels\keycard authentication.dm"
 #include "code\modules\security levels\security levels.dm"
+#include "code\modules\sentry\sentry_event.dm"
 #include "code\modules\shareddream\area.dm"
 #include "code\modules\shareddream\brainghost.dm"
 #include "code\modules\shareddream\dream_entry.dm"
diff --git a/code/__DEFINES/subsystems.dm b/code/__DEFINES/subsystems.dm
index 3b55776d7c3..ba0e7057a45 100644
--- a/code/__DEFINES/subsystems.dm
+++ b/code/__DEFINES/subsystems.dm
@@ -225,6 +225,7 @@
 #define INIT_ORDER_DBCORE 95
 #define INIT_ORDER_AUTH 94 //Admin permissions should be loaded early on
 #define INIT_ORDER_SOUNDS 83
+#define INIT_ORDER_SENTRY 79
 #define INIT_ORDER_DISCORD 78
 #define INIT_ORDER_JOBS 65 // Must init before atoms, to set up properly the dynamic job lists.
 #define INIT_ORDER_AI_CONTROLLERS 55 //So the controller can get the ref
diff --git a/code/__HELPERS/logging/_logging.dm b/code/__HELPERS/logging/_logging.dm
index 9a9711dea60..0920ad53d44 100644
--- a/code/__HELPERS/logging/_logging.dm
+++ b/code/__HELPERS/logging/_logging.dm
@@ -98,6 +98,9 @@ GLOBAL_LIST_INIT(testing_global_profiler, list("_PROFILE_NAME" = "Global"))
 
 		log_runtime("========= END OF RUNTIME DUMP =========")
 
+	if(SSsentry)
+		SSsentry.capture_exception(e, null, usr)
+
 
 //pretty print a direction bitflag, can be useful for debugging.
 /proc/print_dir(var/dir)
diff --git a/code/__HELPERS/logging/debug.dm b/code/__HELPERS/logging/debug.dm
index 44ce5274dc5..255e0150def 100644
--- a/code/__HELPERS/logging/debug.dm
+++ b/code/__HELPERS/logging/debug.dm
@@ -63,6 +63,8 @@
 /// Logging for DB errors
 /proc/log_sql(text)
 	WRITE_LOG(GLOB.config.logfiles["sql_error_log"], "SQL: [text]")
+	if(SSsentry)
+		SSsentry.capture_message(text, "error", "sql")
 
 /// Logging for world/Topic
 /proc/_log_topic(text)
diff --git a/code/__HELPERS/logging/subsystems/dbcore.dm b/code/__HELPERS/logging/subsystems/dbcore.dm
index e4e3f7d4f72..94e0067b2e2 100644
--- a/code/__HELPERS/logging/subsystems/dbcore.dm
+++ b/code/__HELPERS/logging/subsystems/dbcore.dm
@@ -1,3 +1,5 @@
 /proc/log_subsystem_dbcore(text)
 	if (GLOB.config?.logsettings["log_subsystems_dbcore"])
 		WRITE_LOG(GLOB.config.logfiles["world_subsystems_dbcore_log"], "SSdbcore: [text]")
+	if(SSsentry)
+		SSsentry.capture_message(text, "error", "sql")
diff --git a/code/__HELPERS/logging/subsystems/sentry.dm b/code/__HELPERS/logging/subsystems/sentry.dm
new file mode 100644
index 00000000000..d7b3470a992
--- /dev/null
+++ b/code/__HELPERS/logging/subsystems/sentry.dm
@@ -0,0 +1,4 @@
+/// Logging for the Sentry subsystem itself (not the events it forwards).
+/proc/log_subsystem_sentry(text)
+	if (GLOB.config?.logsettings["log_subsystems_sentry"])
+		WRITE_LOG(GLOB.config.logfiles["world_subsystems_sentry_log"], "SSsentry: [text]")
diff --git a/code/controllers/configuration.dm b/code/controllers/configuration.dm
index 80360837fcc..07baf8b089d 100644
--- a/code/controllers/configuration.dm
+++ b/code/controllers/configuration.dm
@@ -70,6 +70,7 @@ GLOBAL_LIST_EMPTY(gamemode_cache)
 	"log_subsystems_zas" = FALSE, // ZAS
 	"log_subsystems_zas_debug" = FALSE, // ZAS debug
 	"log_subsystems_http" = TRUE, //HTTP Log
+	"log_subsystems_sentry" = TRUE, //Sentry subsystem self-diagnostics
 
 	/*#### MODULES ####*/
 
@@ -129,6 +130,7 @@ GLOBAL_LIST_EMPTY(gamemode_cache)
 	"world_subsystems_zas" = "subsystems/zas.log",
 	"world_subsystems_zas_debug" = "subsystems/zas.log",
 	"world_subsystems_http" = "subsystems/http.log",
+	"world_subsystems_sentry_log" = "subsystems/sentry.log",
 
 	/*#### MODULES ####*/
 
@@ -1188,6 +1190,41 @@ GENERAL_PROTECT_DATUM(/datum/configuration)
 					SSdiscord.alert_visibility = TRUE
 				else
 					log_config("Unknown setting in discord configuration: '[name]'")
+
+		else if (type == "sentry")
+			if (!SSsentry)
+				log_config("Sentry: Attempted to read config/sentry.txt before SSsentry was initialized.")
+				return
+
+			switch (name)
+				if ("enabled")
+					SSsentry._config_enabled_flag = TRUE
+				if ("dsn")
+					if (!SSsentry.parse_dsn(value))
+						log_config("Sentry: Invalid DSN '[value]' in config/sentry.txt")
+				if ("environment")
+					SSsentry.environment = value
+				if ("server_name")
+					SSsentry.server_name = value
+				if ("capture_runtimes")
+					SSsentry.capture_runtimes = text2num(value) ? TRUE : FALSE
+				if ("capture_sql")
+					SSsentry.capture_sql = text2num(value) ? TRUE : FALSE
+				if ("capture_hard_dels")
+					SSsentry.capture_hard_dels = text2num(value) ? TRUE : FALSE
+				if ("capture_profiler")
+					SSsentry.capture_profiler = text2num(value) ? TRUE : FALSE
+				if ("profiler_top_n")
+					SSsentry.profiler_top_n = text2num(value)
+				if ("dedup_window")
+					SSsentry.dedup_window = text2num(value)
+				if ("scrub_ckeys")
+					SSsentry.scrub_ckeys = text2num(value) ? TRUE : FALSE
+				if ("max_consecutive_failures")
+					SSsentry.max_consecutive_failures = text2num(value)
+				else
+					log_config("Sentry: Unknown setting '[name]' in config/sentry.txt")
+
 	load_logging_config()
 	load_away_sites_config()
 	load_exoplanets_config()
diff --git a/code/controllers/subsystems/garbage.dm b/code/controllers/subsystems/garbage.dm
index 2fb5dea2b4d..37e9b91fa51 100644
--- a/code/controllers/subsystems/garbage.dm
+++ b/code/controllers/subsystems/garbage.dm
@@ -312,6 +312,14 @@ SUBSYSTEM_DEF(garbage)
 			log_game("Error: [type]([refID]) took longer than [threshold] seconds to delete (took [round(time/10, 0.1)] seconds to delete)")
 			message_admins("Error: [type]([refID]) took longer than [threshold] seconds to delete (took [round(time/10, 0.1)] seconds to delete).")
 			type_info.qdel_flags |= QDEL_ITEM_ADMINS_WARNED
+			if(SSsentry)
+				SSsentry.capture_message(
+					"Hard delete overrun: [type] ([refID])",
+					"warning",
+					"garbage",
+					tags = list("datum_type" = "[type]"),
+					extra = list("ref_id" = refID, "time_ms" = tick_usage)
+				)
 		type_info.hard_deletes_over_threshold++
 		var/overrun_limit = 0 // Used to be CONFIG_GET(number/hard_deletes_overrun_limit)
 		if (overrun_limit && type_info.hard_deletes_over_threshold >= overrun_limit)
diff --git a/code/controllers/subsystems/profiler.dm b/code/controllers/subsystems/profiler.dm
index 781b849b3d3..f7c92e18e2e 100644
--- a/code/controllers/subsystems/profiler.dm
+++ b/code/controllers/subsystems/profiler.dm
@@ -72,6 +72,9 @@ SUBSYSTEM_DEF(profiler)
 	WRITE_FILE(sendmaps_file, current_sendmaps_data)
 	write_cost = MC_AVERAGE(write_cost, TICK_DELTA_TO_MS(TICK_USAGE_REAL - timer))
 
+	if(SSsentry)
+		SSsentry.capture_profiler_dump(current_profile_data, fetch_cost, write_cost)
+
 #undef PROFILER_FILENAME
 #undef SENDMAPS_FILENAME
 #undef PROFILER_PATH
diff --git a/code/controllers/subsystems/sentry.dm b/code/controllers/subsystems/sentry.dm
new file mode 100644
index 00000000000..329755aa986
--- /dev/null
+++ b/code/controllers/subsystems/sentry.dm
@@ -0,0 +1,382 @@
+/**
+ * # SSsentry — Sentry.io Integration
+ *
+ * Captures runtime exceptions, SQL errors, and hard-delete overruns and
+ * forwards them to sentry.io as structured events via the Sentry Envelope API.
+ *
+ * ## Setup
+ * Copy config/example/sentry.txt to config/sentry.txt, set DSN and uncomment ENABLED.
+ * The subsystem is off by default; it only activates when both ENABLED and DSN are present.
+ *
+ * ## Capture sites (wired elsewhere)
+ * - world/Error()           → runtime exceptions    (error_handler.dm)
+ * - log_exception()         → caught exceptions     (_logging.dm)
+ * - log_sql()               → DB / ARGPARSE errors  (debug.dm)
+ * - SSgarbage/HardDelete()  → over-threshold hard dels (garbage.dm)
+ *
+ * ## Kill-switch
+ * After max_consecutive_failures HTTP errors the subsystem sets active = FALSE
+ * and stops sending. An admin can reset it in-round via VV (set active = TRUE).
+ */
+
+SUBSYSTEM_DEF(sentry)
+	name = "Sentry"
+	init_order = INIT_ORDER_SENTRY
+	flags = SS_NO_FIRE | SS_NO_DISPLAY
+
+	// ---- config flags ----
+	/// Master on/off switch. Set to TRUE when ENABLED + valid DSN are both present.
+	var/enabled = FALSE
+	/// Runtime kill-switch: flipped to FALSE after too many consecutive HTTP failures.
+	var/active = TRUE
+	/// Capture uncaught and caught runtime exceptions.
+	var/capture_runtimes = TRUE
+	/// Capture SQL errors and ARGPARSE failures.
+	var/capture_sql = TRUE
+	/// Capture hard-delete overruns.
+	var/capture_hard_dels = TRUE
+	/// Capture per-window BYOND profiler dumps as events with the raw JSON attached. Off by default — payloads are large.
+	var/capture_profiler = FALSE
+	/// How many of the hottest procs to include in the event extras alongside the attachment.
+	var/profiler_top_n = 20
+	/// Hash ckeys with md5 before sending instead of sending them in the clear.
+	var/scrub_ckeys = TRUE
+
+	// ---- DSN fields (populated by _parse_dsn) ----
+	var/dsn_key = ""
+	var/dsn_host = ""
+	var/dsn_project_id = ""
+	/// Fully constructed envelope POST URL built from the DSN.
+	var/endpoint_url = ""
+
+	// ---- event context ----
+	/// Maps to Sentry's "environment" field (e.g. "production", "staging").
+	var/environment = "production"
+	/// Maps to Sentry's "release" field. Populated from git HEAD SHA at init.
+	var/release = ""
+	/// Maps to Sentry's "server_name" field.
+	var/server_name = ""
+
+	// ---- runtime state ----
+	/// Per-round dedup table: erroruid (file:line) → world.time of last send.
+	var/list/sent_this_round
+	/// How long (in deciseconds of game time) to suppress duplicate file:line events. Defaults to 600 (60 s).
+	var/dedup_window = 600
+	/// Count of consecutive HTTP failures. Reset on any success.
+	var/consecutive_failures = 0
+	/// Kill-switch threshold.
+	var/max_consecutive_failures = 10
+
+	// Internal flag used during config loading — tracks whether ENABLED was seen.
+	var/_config_enabled_flag = FALSE
+
+// Hide DSN key from VV to avoid credential exposure.
+/datum/controller/subsystem/sentry/can_vv_get(var_name)
+	if (var_name == NAMEOF(src, dsn_key))
+		return FALSE
+	return ..()
+
+/datum/controller/subsystem/sentry/vv_edit_var(var_name, var_value)
+	if (var_name == NAMEOF(src, dsn_key))
+		return FALSE
+	return ..()
+
+/datum/controller/subsystem/sentry/Initialize(timeofday)
+	sent_this_round = list()
+	server_name = GLOB.config?.server_name || ""
+
+	if (fexists("config/sentry.txt"))
+		GLOB.config.load("config/sentry.txt", "sentry")
+	else
+		log_subsystem_sentry("config/sentry.txt not found — disabled.")
+		return SS_INIT_NO_NEED
+
+	if (!_config_enabled_flag)
+		log_subsystem_sentry("ENABLED not set in config/sentry.txt — disabled.")
+		return SS_INIT_NO_NEED
+
+	if (!endpoint_url)
+		log_subsystem_sentry("Valid DSN not found in config/sentry.txt — disabled.")
+		return SS_INIT_NO_NEED
+
+	enabled = TRUE
+	release = rustg_git_revparse("HEAD")
+	log_subsystem_sentry("Initialized. env=[environment] release=[release] project=[dsn_project_id] host=[dsn_host]")
+	return SS_INIT_SUCCESS
+
+/datum/controller/subsystem/sentry/stat_entry(msg)
+	msg = "enabled=[enabled] active=[active] failures=[consecutive_failures]"
+	return ..()
+
+// ---------------------------------------------------------------------------
+// DSN parsing (called from configuration.dm type == "sentry" handler)
+// ---------------------------------------------------------------------------
+
+/**
+ * Parse a Sentry DSN and populate dsn_key, dsn_host, dsn_project_id, endpoint_url.
+ *
+ * Expected format: https://KEY@HOST/PROJECT_ID
+ * Returns TRUE on success, FALSE on malformed input.
+ */
+/datum/controller/subsystem/sentry/proc/parse_dsn(dsn)
+	if (!dsn || dsn == "")
+		return FALSE
+
+	var/rest = dsn
+	var/protocol = "https"
+
+	if (findtext(rest, "https://") == 1)
+		rest = copytext(rest, 9)
+	else if (findtext(rest, "http://") == 1)
+		rest = copytext(rest, 8)
+		protocol = "http"
+	else
+		return FALSE
+
+	var/at_pos = findtext(rest, "@")
+	if (!at_pos)
+		return FALSE
+
+	dsn_key = copytext(rest, 1, at_pos)
+	rest    = copytext(rest, at_pos + 1)
+
+	var/slash_pos = findtext(rest, "/")
+	if (!slash_pos)
+		return FALSE
+
+	dsn_host       = copytext(rest, 1, slash_pos)
+	dsn_project_id = copytext(rest, slash_pos + 1)
+	endpoint_url   = "[protocol]://[dsn_host]/api/[dsn_project_id]/envelope/"
+	return TRUE
+
+// ---------------------------------------------------------------------------
+// Public capture API
+// ---------------------------------------------------------------------------
+
+/**
+ * Capture an uncaught or caught runtime exception.
+ *
+ * Call from world/Error() and log_exception().
+ *
+ * Arguments:
+ * * e         — the /exception datum
+ * * desclines — optional list of extra context lines from error_handler
+ * * usr_ref   — usr at time of exception (may be null)
+ */
+/datum/controller/subsystem/sentry/proc/capture_exception(exception/e, list/desclines, usr_ref)
+	SHOULD_NOT_SLEEP(TRUE)
+	if (!enabled || !active || !capture_runtimes || isnull(e))
+		return
+
+	var/erroruid = "[e.file]:[e.line]"
+	// Dedup: skip if the same file:line was already sent within dedup_window deciseconds of game time.
+	if (sent_this_round[erroruid] && (world.time - sent_this_round[erroruid]) < dedup_window)
+		return
+	sent_this_round[erroruid] = world.time
+
+	var/datum/sentry_event/ev = new()
+	ev.level  = "error"
+	ev.logger = "world.Error"
+	ev.set_exception(e, desclines)
+
+	if (!isnull(usr_ref))
+		if (scrub_ckeys)
+			ev.set_usr_scrubbed(usr_ref)
+		else
+			ev.set_usr(usr_ref)
+
+	_send_event(ev)
+
+/**
+ * Capture a message-style event (SQL error, hard delete, etc.).
+ *
+ * Arguments:
+ * * message — human-readable description
+ * * level   — Sentry severity: "error", "warning", "info"
+ * * logger  — logical name shown in Sentry (e.g. "sql", "garbage")
+ * * tags    — optional assoc list of short indexed tags
+ * * extra   — optional assoc list of non-indexed context
+ */
+/datum/controller/subsystem/sentry/proc/capture_message(message, level = "error", logger = "game", list/tags, list/extra)
+	SHOULD_NOT_SLEEP(TRUE)
+	if (!enabled || !active)
+		return
+
+	var/datum/sentry_event/ev = new()
+	ev.level  = level
+	ev.logger = logger
+	ev.set_message(message)
+
+	if (tags)
+		for (var/k in tags)
+			ev.tags[k] = tags[k]
+	if (extra)
+		for (var/k in extra)
+			ev.extra[k] = extra[k]
+
+	_send_event(ev)
+
+/**
+ * Capture a BYOND profiler dump as a Sentry event with the raw JSON attached.
+ *
+ * Sentry's Profiling product expects sample-based stack frames; BYOND's profiler
+ * is aggregated per-proc, so this ships as a regular event (logger="profiler",
+ * level="info") with the top-N hottest procs in `extra` and the full JSON
+ * payload as an event attachment for offline inspection.
+ *
+ * Arguments:
+ * * profile_json — raw JSON string from world.Profile(PROFILE_REFRESH, format="json")
+ * * fetch_ms     — SSprofiler fetch_cost at time of dump
+ * * write_ms     — SSprofiler write_cost at time of dump
+ */
+/datum/controller/subsystem/sentry/proc/capture_profiler_dump(profile_json, fetch_ms, write_ms)
+	SHOULD_NOT_SLEEP(TRUE)
+	if (!enabled || !active || !capture_profiler)
+		return
+	if (!profile_json || !length(profile_json))
+		return
+
+	var/list/parsed = json_decode(profile_json)
+	if (!islist(parsed))
+		return
+
+	var/list/top = _profiler_top_n(parsed, profiler_top_n)
+
+	var/datum/sentry_event/ev = new()
+	ev.level  = "info"
+	ev.logger = "profiler"
+	ev.set_message("Profiler dump (procs=[length(parsed)] top=[length(top)])")
+	ev.tags["fetch_ms"]   = "[round(fetch_ms, 0.1)]"
+	ev.tags["write_ms"]   = "[round(write_ms, 0.1)]"
+	ev.tags["proc_count"] = "[length(parsed)]"
+	ev.extra["top_procs"] = top
+
+	_send_event(ev, profile_json, "profile.json", "application/json")
+
+/// Return the top-N profiler entries by self-time, descending. Pass-through fields so format changes don't break.
+/datum/controller/subsystem/sentry/proc/_profiler_top_n(list/entries, n)
+	if (!islist(entries) || !length(entries))
+		return list()
+	var/list/sorted = entries.Copy()
+	sortTim(sorted, GLOBAL_PROC_REF(cmp_sentry_profiler_self_desc))
+	if (length(sorted) > n)
+		sorted.Cut(n + 1)
+	return sorted
+
+/proc/cmp_sentry_profiler_self_desc(list/A, list/B)
+	var/a_self = islist(A) ? A["self"] : 0
+	var/b_self = islist(B) ? B["self"] : 0
+	return b_self - a_self
+
+// ---------------------------------------------------------------------------
+// Internal dispatch
+// ---------------------------------------------------------------------------
+
+/datum/controller/subsystem/sentry/proc/_send_event(datum/sentry_event/ev, attachment_body = null, attachment_filename = null, attachment_content_type = null)
+	SHOULD_NOT_SLEEP(TRUE)
+	PRIVATE_PROC(TRUE)
+
+	if (!enabled || !active)
+		return
+
+	// Stamp common context.
+	ev.tags["round_id"]      = "[GLOB.round_id]"
+	ev.tags["byond_version"] = "[world.version]"
+	ev.environment = environment
+	ev.server_name = server_name
+	ev.release     = release
+
+	var/envelope_body = _build_envelope(ev, attachment_body, attachment_filename, attachment_content_type)
+	if (!envelope_body)
+		return
+
+	var/list/req_headers = list(
+		"Content-Type"  = "application/x-sentry-envelope",
+		"X-Sentry-Auth" = "Sentry sentry_version=7,sentry_key=[dsn_key],sentry_client=aurora.sentry/1.0"
+	)
+
+	if (!isnull(SShttp))
+		var/datum/callback/cb = CALLBACK(src, PROC_REF(_on_response))
+		SShttp.create_async_request(RUSTG_HTTP_METHOD_POST, endpoint_url, envelope_body, req_headers, cb)
+	else
+		// SShttp not yet available (very early runtime) — fire-and-forget directly via rust_g.
+		rustg_http_request_async(RUSTG_HTTP_METHOD_POST, endpoint_url, envelope_body, json_encode(req_headers), null)
+
+/datum/controller/subsystem/sentry/proc/_on_response(datum/http_response/res)
+	PRIVATE_PROC(TRUE)
+
+	if (!res || res.errored || (res.status_code && res.status_code >= 400))
+		consecutive_failures++
+		if (consecutive_failures >= max_consecutive_failures)
+			active = FALSE
+			var/last_err = res ? (res.errored ? "[res.error]" : "HTTP [res.status_code]") : "null response"
+			log_subsystem_sentry("Kill-switch triggered after [consecutive_failures] consecutive failures. Last: [last_err]")
+			admin_notice(SPAN_DANGER("Sentry kill-switch triggered after [consecutive_failures] consecutive HTTP failures ([last_err]). \
+				Event reporting is disabled. Reset via VV: SSsentry → active = TRUE."), R_ADMIN|R_MOD|R_DEV)
+		return
+
+	consecutive_failures = 0
+
+// ---------------------------------------------------------------------------
+// Envelope serialization
+// ---------------------------------------------------------------------------
+
+/**
+ * Build a Sentry envelope: header + event item, plus an optional attachment item.
+ *
+ * Layout:
+ *   {envelope-header}\n
+ *   {event-item-header}\n
+ *   {event-payload}\n
+ *   [{attachment-item-header}\n{attachment-payload}\n]   ← only when attachment_body set
+ */
+/datum/controller/subsystem/sentry/proc/_build_envelope(datum/sentry_event/ev, attachment_body = null, attachment_filename = null, attachment_content_type = null)
+	PRIVATE_PROC(TRUE)
+
+	ev.event_id  = _generate_event_id()
+	ev.timestamp = _iso8601_now()
+
+	var/payload_json = json_encode(ev.to_list())
+	if (!payload_json)
+		return null
+
+	var/list/env_header = list(
+		"event_id" = ev.event_id,
+		"sent_at"  = ev.timestamp,
+		"sdk"      = list("name" = "aurora.sentry", "version" = "1.0")
+	)
+	var/list/item_header = list(
+		"type"         = "event",
+		"content_type" = "application/json",
+		"length"       = length(payload_json)
+	)
+
+	var/envelope = "[json_encode(env_header)]\n[json_encode(item_header)]\n[payload_json]\n"
+
+	if (attachment_body && length(attachment_body))
+		var/list/att_header = list(
+			"type"            = "attachment",
+			"length"          = length(attachment_body),
+			"content_type"    = attachment_content_type || "application/octet-stream",
+			"filename"        = attachment_filename || "attachment.bin",
+			"attachment_type" = "event.attachment"
+		)
+		envelope += "[json_encode(att_header)]\n[attachment_body]\n"
+
+	return envelope
+
+/// Generate a pseudo-random 32-char hex event ID via md5.
+/datum/controller/subsystem/sentry/proc/_generate_event_id()
+	PRIVATE_PROC(TRUE)
+
+	return md5("[world.time][world.realtime][rand(0, 9999999)]")
+
+/// Return current time as ISO-8601 UTC string (YYYY-MM-DDTHH:MM:SSZ).
+/datum/controller/subsystem/sentry/proc/_iso8601_now()
+	PRIVATE_PROC(TRUE)
+
+	var/t = time2text(world.realtime, "YYYY-MM-DD hh:mm:ss")
+	var/space = findtext(t, " ")
+	if (space)
+		return "[copytext(t, 1, space)]T[copytext(t, space + 1)]Z"
+	return t
diff --git a/code/defines/procs/dbcore.dm b/code/defines/procs/dbcore.dm
index 820f7310c95..6f1e965fac7 100644
--- a/code/defines/procs/dbcore.dm
+++ b/code/defines/procs/dbcore.dm
@@ -195,8 +195,7 @@ Delayed insert mode was removed in mysql 7 and only works with MyISAM type table
 
 	var/error = ErrorMsg()
 	if (error)
-		log_sql("SQL Error: '[error]'")
-		log_sql(" - during query: [sql_query]")
+		log_sql("SQL Error: '[error]' during query: [sql_query]")
 		// This is hacky and should probably be changed
 		if (error == "MySQL server has gone away")
 			log_game("MySQL connection drop detected, attempting to reconnect.")
@@ -319,11 +318,9 @@ Delayed insert mode was removed in mysql 7 and only works with MyISAM type table
 					parsed += cache[curr_arg]
 				else
 #ifdef UNIT_TEST
-					log_world("ERROR: SQL ARGPARSE: Unpopulated argument found in an SQL query.")
-					log_world("ERROR: SQL ARGPARSE: [curr_arg]. Query: [query_to_parse]")
+					log_world("ERROR: SQL ARGPARSE: Unpopulated argument found in an SQL query: [curr_arg]. Query: [query_to_parse]")
 #else
-					log_sql("SQL ARGPARSE: Unpopulated argument found in an SQL query.")
-					log_sql("SQL ARGPARSE: [curr_arg]. Query: [query_to_parse]")
+					log_sql("SQL ARGPARSE: Unpopulated argument found in an SQL query: [curr_arg]. Query: [query_to_parse]")
 #endif
 					return null
 
diff --git a/code/modules/error_handler/error_handler.dm b/code/modules/error_handler/error_handler.dm
index 7041695fdd5..af3fe9f6957 100644
--- a/code/modules/error_handler/error_handler.dm
+++ b/code/modules/error_handler/error_handler.dm
@@ -137,6 +137,9 @@ GLOBAL_VAR_INIT(total_runtimes_skipped, 0)
 
 	// This writes the regular format (unwrapping newlines and inserting timestamps as needed).
 	log_runtime("runtime error: [E.name]\n[E.desc]")
+
+	if(SSsentry)
+		SSsentry.capture_exception(E, desclines, usr)
 #undef ERROR_USEFUL_LEN
 
 
diff --git a/code/modules/sentry/sentry_event.dm b/code/modules/sentry/sentry_event.dm
new file mode 100644
index 00000000000..3d9be36337e
--- /dev/null
+++ b/code/modules/sentry/sentry_event.dm
@@ -0,0 +1,137 @@
+/**
+ * # Sentry Event
+ *
+ * Payload builder for a single Sentry event.
+ * Populated by SSsentry capture procs, then serialized via to_list() for
+ * json_encode() before being sent in the envelope body.
+ */
+/datum/sentry_event
+	/// 32-char hex UUID, stamped by SSsentry just before sending.
+	var/event_id = ""
+	/// ISO-8601 UTC timestamp, stamped by SSsentry just before sending.
+	var/timestamp = ""
+	/// Sentry level: "fatal", "error", "warning", "info", "debug".
+	var/level = "error"
+	/// Logical logger name shown in Sentry (e.g. "world.Error", "sql", "garbage").
+	var/logger = ""
+	/// Sentry environment tag, e.g. "production".
+	var/environment = ""
+	/// Sentry release string.
+	var/release = ""
+	/// Human-readable server identifier.
+	var/server_name = ""
+
+	// ---- tags & extra ----
+	/// Assoc list of short indexed tags visible in Sentry's issue sidebar.
+	var/list/tags
+	/// Assoc list of arbitrary extra context (not indexed).
+	var/list/extra
+
+	// ---- exception fields (mutually exclusive with message) ----
+	var/exc_type  = ""
+	var/exc_value = ""
+	var/exc_file  = ""
+	var/exc_line  = 0
+	/// Flat list of detail lines from error_handler's desclines (optional).
+	var/list/exc_desc_lines
+
+	// ---- message fields ----
+	var/message_text = ""
+
+	// ---- user context ----
+	/// Sentry user id — either raw ckey or md5(ckey) depending on scrub setting.
+	var/usr_id = ""
+
+/datum/sentry_event/New()
+	tags  = list()
+	extra = list()
+
+// ---------------------------------------------------------------------------
+// Payload setters
+// ---------------------------------------------------------------------------
+
+/**
+ * Populate exception fields from a BYOND /exception datum.
+ * desclines is the optional list of extra context from world/Error().
+ */
+/datum/sentry_event/proc/set_exception(exception/e, list/desclines)
+	exc_type  = e.name || "RuntimeError"
+	exc_value = e.desc || ""
+	exc_file  = e.file || ""
+	exc_line  = e.line || 0
+	if (LAZYLEN(desclines))
+		exc_desc_lines = desclines.Copy()
+
+/// Set message text for SQL-error and hard-delete style events.
+/datum/sentry_event/proc/set_message(text)
+	message_text = text
+
+/// Set usr context without scrubbing (ckey sent in the clear).
+/datum/sentry_event/proc/set_usr(atom/usr_ref)
+	if (istype(usr_ref, /mob))
+		var/mob/m = usr_ref
+		usr_id = m.ckey || m.name || "unknown"
+	else if (istype(usr_ref, /client))
+		var/client/c = usr_ref
+		usr_id = c.ckey || "unknown"
+
+/// Set usr context with ckey hashed (md5) for PII compliance.
+/datum/sentry_event/proc/set_usr_scrubbed(atom/usr_ref)
+	var/raw_ckey = ""
+	if (istype(usr_ref, /mob))
+		var/mob/m = usr_ref
+		raw_ckey = m.ckey || ""
+	else if (istype(usr_ref, /client))
+		var/client/c = usr_ref
+		raw_ckey = c.ckey || ""
+	usr_id = raw_ckey ? md5(raw_ckey) : "anonymous"
+
+// ---------------------------------------------------------------------------
+// Serialization
+// ---------------------------------------------------------------------------
+
+/**
+ * Return an associative list ready for json_encode().
+ * Omits empty/null fields to keep payloads lean.
+ */
+/datum/sentry_event/proc/to_list()
+	var/list/out = list(
+		"event_id"  = event_id,
+		"timestamp" = timestamp,
+		"platform"  = "other",
+		"level"     = level
+	)
+
+	if (logger)      out["logger"]      = logger
+	if (environment) out["environment"] = environment
+	if (release)     out["release"]     = release
+	if (server_name) out["server_name"] = server_name
+
+	if (length(tags))  out["tags"]  = tags
+	if (length(extra)) out["extra"] = extra
+
+	if (usr_id)
+		out["user"] = list("id" = usr_id)
+
+	// --- exception payload ---
+	if (exc_type)
+		var/list/exc_val = list(
+			"type"  = exc_type,
+			"value" = exc_value
+		)
+		if (exc_file)
+			exc_val["stacktrace"] = list(
+				"frames" = list(list(
+					"filename" = exc_file,
+					"lineno"   = exc_line
+				))
+			)
+		if (LAZYLEN(exc_desc_lines))
+			exc_val["extra"] = list("detail" = exc_desc_lines.Join("\n"))
+		out["exception"] = list("values" = list(exc_val))
+
+	// --- message payload ---
+	if (message_text)
+		out["message"] = list("formatted" = message_text)
+
+	return out
diff --git a/config/example/sentry.txt b/config/example/sentry.txt
new file mode 100644
index 00000000000..b768bd2fd4b
--- /dev/null
+++ b/config/example/sentry.txt
@@ -0,0 +1,46 @@
+## Sentry.io Integration for Aurora Station
+##
+## Copy this file to config/sentry.txt and fill in your project DSN.
+## Without ENABLED uncommented the subsystem does nothing.
+##
+## DSN format: https://PUBLIC_KEY@HOST/PROJECT_ID
+## Find your DSN at: Settings → Projects → <your project> → SDK Setup → DSN
+
+## Uncomment to activate.
+# ENABLED
+
+## Your project DSN (required).
+# DSN https://examplekey@o0.ingest.sentry.io/0
+
+## Sentry environment tag. Shown in the Sentry UI.
+## Defaults to "production".
+# ENVIRONMENT production
+
+## Server name shown on each event. Defaults to the value of SERVERNAME in config.txt.
+# SERVER_NAME my-server
+
+## Which categories of events to forward (1 = enabled, 0 = disabled).
+## CAPTURE_RUNTIMES, CAPTURE_SQL, CAPTURE_HARD_DELS default to 1 (enabled).
+## CAPTURE_PROFILER defaults to 0 — each dump attaches the full profiler JSON,
+## which can be large. Only enable if you actually want it in Sentry.
+# CAPTURE_RUNTIMES 1
+# CAPTURE_SQL 1
+# CAPTURE_HARD_DELS 1
+# CAPTURE_PROFILER 0
+
+## How many of the hottest procs (by self-time) to include in event extras
+## alongside the attached JSON. Defaults to 20.
+# PROFILER_TOP_N 20
+
+## How long (in deciseconds of game time) to suppress duplicate file:line exceptions.
+## Set to 0 to disable deduplication. Defaults to 600 (60 seconds).
+# DEDUP_WINDOW 600
+
+## Hash (md5) ckeys before sending instead of forwarding them in the clear.
+## Defaults to 1 (enabled).
+# SCRUB_CKEYS 1
+
+## Disable Sentry after this many consecutive HTTP failures (kill-switch).
+## An admin can reset it in-round via VV (SSsentry → active = TRUE).
+## Defaults to 10.
+# MAX_CONSECUTIVE_FAILURES 10
diff --git a/html/changelogs/arrow768-sentry-sdk.yml b/html/changelogs/arrow768-sentry-sdk.yml
new file mode 100644
index 00000000000..b33d0595187
--- /dev/null
+++ b/html/changelogs/arrow768-sentry-sdk.yml
@@ -0,0 +1,8 @@
+author: arrow768
+
+delete-after: True
+
+changes:
+  - code_imp: "Added Sentry.io integration (SSsentry) for capturing runtime exceptions, SQL errors, and hard-delete overruns to an external error tracking service."
+  - code_imp: "SSsentry can now ship per-window BYOND profiler dumps to Sentry as events with the raw JSON attached and the top-N hottest procs in the event extras (opt-in via CAPTURE_PROFILER)."
+  - server: "Added config/sentry.txt support for configuring the Sentry DSN and capture settings. See config/example/sentry.txt for setup instructions."